ATTACHMENT C SPECIAL STATUS PLANT SURVEY REPORT B... · Pasadena in Los Angeles County, California (Exhibit 1). ... dog-walking, mountain biking, and other recreational activities

ATTACHMENT C

SPECIAL STATUS PLANT SURVEY REPORT

January 20, 2014

Mr. David Rydman, P.E. VIA EMAIL

Carollo Engineers, Inc. [email protected]

199 South Los Robles Avenue, Suite 530

Pasadena, California 91101

Subject: Special Status Botanical Surveys for the Arroyo Seco Canyon Project, City of

Pasadena, Los Angeles County, California

Dear Mr. Rydman:

This Letter Report presents the results of special status botanical surveys for the Arroyo Seco

Canyon Project (hereinafter referred to as the “Proposed Project”) located in the City of

Pasadena in Los Angeles County, California (Exhibit 1).

PROJECT LOCATION AND DESCRIPTION

The Proposed Project is located within Arroyo Seco Canyon, which is part of the Los Angeles

Watershed (Hydrologic Unit Code 18070105). The botanical survey area for the Proposed

Project consists of four separate areas along the Arroyo Seco (Exhibit 1). These areas are located

on the U.S. Geological Survey’s (USGS’) Pasadena 7.5-minute quadrangle (Exhibit 2). Area 1 is

located along and to the west of the stream near the U.S. Forest Service Ranger Station; this area

contains the Arroyo Seco Headworks structure. Area 2 is referred to as the Arroyo Seco Intake

and is located approximately ¼ mile downstream from the Headworks. The Temporary Staging

Site is located approximately 900 feet downstream from the Arroyo Seco Intake area and

encompasses a small area immediately south of the confluence of Millard Canyon and the

Arroyo Seco stream. Area 3, the John L. Behner Treatment Plant study area, is located about

740 feet south of the Temporary Staging Site and includes the Jet Propulsion Laboratory (JPL)

parking lot and adjacent recharge basins.

The Proposed Project will increase the utilization of surface water rights held by the City of

Pasadena Water and Power Department (PWP) and the Lincoln Avenue Water Company

(LAWC) by restoring and improving intake facilities; modifying the existing sediment removal

mechanism; naturalizing the Arroyo Seco streambed; and expanding recharge operations by

creating additional spreading basins. In addition, the Proposed Project is planned to include a

new public restroom facility; recreational and educational amenities near the Headworks

structure; and a new, reduced size parking lot at the existing JPL parking site for those using the

Arroyo Seco Canyon and Hahamongna Watershed Park areas.

Mr. David Rydman

Page 2

January 20, 2014

METHODS

Botanical surveys were floristic in nature and consistent with the Protocols for Surveying and

Evaluating Impacts to Special Status Native Plant Populations and Natural Communities (CDFG

2009). Prior to field surveys, a literature review was conducted to identify special status plants

reported from the vicinity of the Project site. This included a review of the USGS’ Chilao Flat,

Condor Peak, Mt. Wilson, and Pasadena 7.5-minute quadrangles in the California Department of

Fish and Wildlife’s (CDFW’s) California Natural Diversity Database (CDFW 2013) and the

California Native Plant Society’s Electronic Inventory of Rare and Endangered Vascular Plants

of California (CNPS 2013).

Reference populations were monitored for annual and difficult-to-detect species with potential to

occur in the survey area to ensure that the surveys were comprehensive and conducted during the

species’ appropriate blooming period. Table 1 lists the reference populations visited and whether

the species was blooming and/or able to be identified to the taxonomic level necessary to

determine special status. For many annual and perennial herb species, rainfall received in the

winter and spring determines seed germination. According to the National Weather Service, the

region (data taken from La Cañada Flintridge, which is directly to the west of the survey area)

had received 10.11 inches of precipitation between October 1, 2012 and July 31, 2013. This is 46

percent of the mean normal 22.1 inches of precipitation and constitutes a drought year (NOAA

2013). In years of below average rainfall, monitoring of reference populations is important in

order to interpret survey results.

TABLE 1

REFERENCE POPULATION VISITS FOR SPECIAL STATUS PLANT SPECIES

Species Date Blooming Observed Location

Calochortus plummerae Plummer’s mariposa lily

May 15, 2013 Pasadena

Centromadia parryi ssp. australis southern tarplant*

May 14, 2013; August 12, 2013

Newport Beach; Irvine

Chorizanthe parryi var. fernandina San Fernando Valley spineflower

April 10, 2013 Las Virgenes Open Space

Symphyotrichum [Aster] greatae Greata’s aster

August 19, 2013 Angeles National Forest

* The species was not blooming on this date; however, it is identifiable in a vegetative state.

BonTerra Psomas Senior Botanist Kai Palenscar and Biologist Dani Henning conducted special

status botanical surveys on May 3 and June 13, 2013; BonTerra Psomas Senior Biologists

Allison Rudalevige and Jennifer Pareti conducted special status botanical surveys on August 19,

2013. All plant species observed were recorded in field notes and are reported in Attachment A.

Species were identified in the field or collected for later identification using taxonomic keys,

descriptions, and illustrations in Baldwin et al. (2012) and Munz (1974). Plant species were

identified to the taxonomic level necessary to determine whether or not they are a special status

species. Taxonomy follows Baldwin et al. (2012) and current scientific data (e.g., scientific

journals) for scientific and common names. Photographs of the survey area were taken during

surveys and are included in Attachment B.

Mr. David Rydman

Page 3

January 20, 2014

EXISTING CONDITIONS

The survey area occurs at the mouth of the canyon and where it opens up into an alluvial fan.

Elevations range from approximately 1,100 to 1,250 feet above mean sea level (msl). Soil types

in the survey area consist of the Hanford association (2 to 5 percent slopes), which occurs on

gently sloping alluvial fans, is well drained, and has moderately rapid subsoil permeability

(USDA 1969) and Mollic haploxeralfs (2 to 50 percent slopes), which occurs on alluvial fans and

is enriched with aluminum and iron (USDA NRCS 2013).

A public access road parallels the stream and is regularly used for hiking, dog-walking, mountain

biking, and other recreational activities. Area 1 consists of riparian forest dominated by a mix of

white alder (Alnus rhombifolia), western sycamore (Platanus racemosa), coast live oak (Quercus

agrifolia), and various willow species (Salix spp.). This area contained a relatively substantial

amount of water during the surveys, in spite of the low precipitation in 2013. Adjacent hillsides

support a mix of coastal sage scrub and chaparral plant species such as California sagebrush

(Artemisia californica) and laurel sumac (Malosma laurina). Area 2 and the Temporary Staging

Site are composed of similar riparian forest and coastal sage scrub species. Area 3 consists

primarily of developed or disturbed land, with remnant patches of coastal sage scrub along the

perimeter of the parking lot and in a strip through the lot. This vegetation consists of California

sagebrush, laurel sumac, Vasey’s prickly pear (Opuntia x vaseyi), and black sage (Salvia

mellifera).

SURVEY RESULTS

Table 2 identifies special status plant species reported from the vicinity of the survey area based

on the results of the literature review; their potential to occur within the survey area; and the

results of the special status botanical surveys.

TABLE 2

SPECIAL STATUS PLANT SPECIES REPORTED FROM

THE SURVEY AREA VICINITY

Species

Status Habitat Suitability; Results of Focused

Surveys USFWS CDFW CRPR

Arctostaphylos glandulosa ssp. gabrielensis San Gabriel manzanita

— — 1B.2 Outside known range; not expected to occur.

Astragalus brauntonii Braunton’s milkvetch

FE — 1B.1 Potentially suitable habitat; not observed during focused surveys.

Berberis nevinii Nevin’s barberry

FE SE 1B.1 Potentially suitable habitat; not observed during focused surveys.

California [Erodium] macrophylla round-leaved filaree

— — 1B.1 No suitable habitat; not expected to occur.

Calochortus palmeri var. palmeri Palmer’s mariposa lily


Calochortus plummerae Plummer’s mariposa lily

— — 4.2 Potentially suitable habitat; not observed during focused surveys.

Calochortus striatus alkali mariposa lily

— — 1B.2 No suitable habitat and outside known range; not expected to occur.

Mr. David Rydman

Page 4

January 20, 2014

TABLE 2



Species



Castilleja gleasonii

Mt. Gleason paintbrush — SR 1B.2

No suitable habitat; not observed during focused surveys.

Centromadia parryi ssp. australis

southern tarplant — — 1B.1

Potentially suitable habitat; not observed during focused surveys.

Chorizanthe parryi var. fernandina

San Fernando Valley spineflower FC SE 1B.1

Limited potentially suitable habitat; not observed during focused surveys.

Chorizanthe parryi var. parryi Parry’s spineflower

— — 1B.1 Limited potentially suitable habitat; not observed during focused surveys.

Cladium californicum California sawgrass


Dodecahema leptoceras slender-horned spineflower

FE SE 1B.1 No suitable habitat; not expected to occur.

Galium grande San Gabriel bedstraw

— — 1A Outside known range; not expected to occur.

Helianthus nuttallii ssp. parishii Los Angeles sunflower

— — 1A Potentially suitable habitat, but species presumed extinct; not observed during focused surveys.

Horkelia cuneata var. puberula mesa horkelia

— — 1B.1 Potentially suitable habitat; not observed during focused surveys.

Imperata brevifolia California satintail


Lasthenia glabrata ssp. coulteri Coulter’s goldfields


Lepidium virginicum var. robinsonii

Robinson’s pepper-grass* — — 4.3


Linanthus concinnus

San Gabriel linanthus — — 1B.2

No suitable habitat and outside known range; not expected to occur.

Linanthus orcuttii

Orcutt’s linanthus — — 1B.3

No suitable habitat and outside known range; not expected to occur.

Lupinus peirsonii

Peirson’s lupine — — 1B.3

Outside known range; not expected to occur.

Malacothamnus davidsonii Davidson’s bush-mallow

— — 1B.2 Suitable habitat; not observed during focused surveys.

Muhlenbergia californica California muhly

— — 4.3 Suitable habitat; not observed during focused surveys.

Opuntia basilaris var. brachyclada short-joint beavertail


Orobanche valida ssp. valida Rock Creek broomrape

— — 1B.2 No suitable habitat and outside known range; not expected to occur.

Pseudognaphalium leucocephalum

white rabbit-tobacco — — 2B.2


Ribes divaricatum var. parishii

Parish’s gooseberry — — 1A

Potentially suitable habitat, but species presumed extinct; not observed during focused surveys.

Mr. David Rydman

Page 5

January 20, 2014

TABLE 2



Species



Symphyotrichum [Aster] greatae

Greata’s aster — — 1B.3


Thelypteris puberula var. sonorensis Sonoran maiden fern


USFWS: U.S. Fish and Wildlife Service; CDFW: California Department of Fish and Wildlife; CRPR: California Rare Plant Rank; CNDDB: California Natural Diversity Database

Status: Federal (USFWS) State (CDFW) FE Endangered SE Endangered FC Candidate SR Rare CRPR 1A Plants Presumed Extirpated from California and are Either Rare or Extinct Elsewhere 1B Plants Rare, Threatened, or Endangered Throughout Their Range 2B Plants Rare, Threatened, or Endangered in California, But More Common Elsewhere 4 Plants of Limited Distribution – A Watch List CRPR Threat Code Extensions .1 Seriously Threatened in California (over 80% of occurrences threatened; high degree and immediacy of threat) .2 Fairly Threatened in California (20–80% of occurrences threatened; moderate degree and immediacy of threat) .3 Not Very Threatened in California (<20% of occurrences threatened; low degree and immediacy of threat or no current

threats known)

* Robinson’s pepper-grass is not recognized in Baldwin et al. (2012); however, it is still tracked by the CNDDB.

Note: A dash (“—“) indicates that this is not applicable for the species.

One special status plant species, Southern California black walnut (Juglans californica), was

observed. Details of this observed species are discussed below.

Southern California Black Walnut

Southern California black walnut has a CRPR of 4.2. This deciduous tree occurs on hillsides and

in canyons at elevations between 98 and 2,953 feet above msl (Baldwin et al. 2012). It is known

from southwestern California, except the Channel Islands and the San Bernardino Mountains,

and in cultivation in the Santa Lucia Range (Baldwin et al. 2012).

Two southern California black walnut trees were observed in the survey area (Exhibit 3;

Attachment B). One was observed on an east-facing slope in a coastal sage scrub – chaparral

ecotone with laurel sumac, California brickellbush (Brickellia californica), California sagebrush,

and holly-leaved cherry (Prunus ilicifolia). The other was observed on a steep, west-facing slope

in coastal sage scrub adjacent to the JPL parking lot; associated species include California

sagebrush, laurel sumac, and mission prickly-pear (Opuntia ficus-indica).

Mr. David Rydman Page 6 January 20, 2014 CONCLUSION

Individual Southern California black walnut trees should be avoided to the extent feasible. However, Proposed Project impacts on Southern California black walnut individuals would be considered adverse, but less than significant because the loss of relatively few (i.e., two) trees would not substantially affect the regional population of this species. No measures to specifically protect these trees would be required.

Although reference populations and regional rainfall amounts were monitored to ensure the scientific adequacy of these focused surveys, there is always a potential for a false negative survey result as species could possibly be present on a site but may not be detectable at the time of the surveys. Based on the reference population monitoring, many target plant species were observable at the time the Project surveys were conducted. Since most of the area surveyed consists of riparian forest with adequate stream flow, it is unlikely that sensitive riparian plant species were present in the survey area and undetected due to drought conditions.

Please call Marc Blain at (626) 351-2000 with any questions related to this report.

Sincerely, BonTerra Psomas Marc T. Blain Allison D. Rudalevige Senior Project Manager Senior Biologist Enclosures: Exhibits 1–3 Attachment A – Plant Compendium Attachment B – Site Photographs R:\Projects\Carollo\J041\Plant_SurveyRpt-020414.doc

REFERENCES

Baldwin, B.G., D.J. Keil, R. Patterson, T.J. Rosatti, and D.H. Wilken (Eds.). 2012. The Jepson Manual: Vascular Plants of California (Second ed.). Berkeley, CA: University of California Press.

California Department of Fish and Wildlife (CDFW). 2013 (May 3). California Natural Diversity Database. Records of Occurrence for the USGS Chilao Flat, Condor Peak, Mt. Wilson, and Pasadena 7.5-minute quadrangle maps. Sacramento, CA: CDFW, Natural Heritage Division.

Mr. David Rydman

Page 7

January 20, 2014

California Department of Fish and Game (CDFG).1 2009 (November 24). Protocols for

Surveying and Evaluating Impacts to Special Status Native Plant Populations and

Natural Communities. Sacramento, CA: CDFG.

California Native Plant Society (CNPS). 20013. Electronic Inventory of Rare and Endangered

Vascular Plants of California (v7-09d). Records of Occurrence for the USGS Chilao Flat,

Condor Peak, Mt. Wilson, and Pasadena 7.5-minute quadrangle maps. Sacramento, CA:

CNPS. http://www.cnps.org/inventory.

Munz, P.A. 1974. A Flora of Southern California. Berkeley, CA: University of California Press.

National Oceanic and Atmospheric Administration (NOAA). 2013. Daily Climate Report. Silver

Spring, MD: National Weather Service. http://www. nws.noaa.gov/climate.

U.S. Department of Agriculture (USDA). 1969 (revised). Report and General Soil Map, Los

Angeles County, California. Lancaster, CA: USDA, Natural Resources Conservation

Service.

United States Department of Agriculture, Natural Resources Conservation Service (USDA

NRCS). 2013 (last updated). Web Soil Survey (search for Soil Survey Area, Los Angeles

County, California: Angeles National Forest Area, California). Davis, CA: USDA NRCS.

1 Although the California Department of Fish and Game (CDFG) changed its name to the California Department of

Fish and Wildlife (CDFW) effective January 1, 2013, “CDFG” is still used throughout this document for all documents published or database searches completed before January 1, 2013.

Arroyo Seco Canyon Project

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USGS 7.5-minute Quadrangle Exhibit 2

(Rev: 12-17-2013 MMD) R:\Projects\Carollo\J041\Graphics\Plant\ex2_USGS.pdf

Special Status Plant Species LocationsArroyo Seco Canyon Project

Exhibit 3

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ATTACHMENT A

PLANT COMPENDIUM


R:\Projects\Carollo\J041\Plant_SurveyRpt-020414.doc A-1 Plant Compendium

PLANTS OBSERVED IN THE SURVEY AREA

DURING 2013 SPECIAL STATUS BOTANICAL SURVEYS

Species

PTERIDOPHYTES - FERNS AND ALLIES

DRYOPTERIDACEAE - WOOD FERN FAMILY

Dryopteris arguta coastal wood fern

POLYPODIACEAE - POLYPODY FAMILY

Polypodium californicum California polypody

PTERIDACEAE - BRAKE FAMILY

Pellaea andromedifolia coffee fern

Pentagramma triangularis ssp. triangularis goldenback fern

SELAGINELLACEAE - SPIKE-MOSS FAMILY

Selaginella bigelovii Bigelow's or bushy spike-moss

ANGIOSPERMAE - FLOWERING PLANTS

MAGNOLIIDS

LAURACEAE - LAUREL FAMILY

Umbellularia californica California bay

EUDICOTS

ADOXACEAE - MUSKROOT FAMILY

Sambucus nigra ssp. caerulea [S. mexicana] blue elderberry

AMARANTHACEAE - AMARANTH FAMILY

Amaranthus albus* tumbleweed

ANACARDIACEAE - SUMAC FAMILY

Malosma laurina laurel sumac

Rhus aromatica [R. trilobata] skunk bush

Rhus ovata sugar bush

Toxicodendron diversilobum western poison oak

APOCYNACEAE - DOGBANE FAMILY

Nerium oleander* common oleander

Vinca major* greater periwinkle

ASTERACEAE - SUNFLOWER FAMILY

Acourtia microcephala sacapellote

Ageratina adenophora* crofton weed

Ambrosia acanthicarpa annual bur-sage

Ambrosia psilostachya western ragweed

Anthemis cotula* mayweed

Artemisia californica California sagebrush

Artemisia douglasiana mugwort

Artemisia dracunculus tarragon

Baccharis pilularis ssp. consanguinea [B. pilularis] coyote brush

Baccharis salicifolia ssp. salicifolia [B. salicifolia] mule fat

Bidens pilosa* common beggar-ticks

Brickellia californica California brickellbush

Carduus pycnocephalus ssp. pycnocephalus* Italian thistle

Centaurea melitensis* tocalote, Malta star-thistle

Chaenactis glabriuscula yellow pincushion

Cirsium occidentale western thistle





Species

Cirsium vulgare* bull thistle

Corethrogyne filaginifolia [Lessingia f.] California-aster

Delairea odorata [Senecio mikanioides]* cape ivy, German ivy

Eriophyllum confertiflorum golden-yarrow

Euthamia occidentalis western goldenrod

Heterotheca grandiflora telegraph weed

Heterotheca sessiliflora sessileflower goldenaster

Hypochaeris glabra* smooth cat's-ear

Lactuca serriola* prickly lettuce

Lepidospartum squamatum scale-broom

Malacothrix saxatilis var. saxatilis cliff malacothrix

Pseudognaphalium californicum [Gnaphalium c.] California everlasting

Pseudognaphalium canescens [Gnaphalium c.] everlasting

Pseudognaphalium luteoalbum [Gnaphalium l.]* weedy cudweed

Sonchus oleraceus* common sow thistle

Stephanomeria exigua wreath plant

Xanthium strumarium cocklebur

BETULACEAE - BIRCH FAMILY

Alnus rhombifolia white alder

BORAGINACEAE - BORAGE FAMILY

Cryptantha sp. cryptantha

Eriodictyon crassifolium thick-leaf yerba santa

Eucrypta chrysanthemifolia common eucrypta

Phacelia cicutaria caterpillar phacelia

Phacelia minor wild canterbury-bell

Phacelia ramosissima branching phacelia

Plagiobothrys sp. popcorn flower

BRASSICACEAE - MUSTARD FAMILY

Brassica nigra* black mustard

Hirschfeldia incana* shortpod mustard

Lepidium nitidum peppergrass / shining peppergrass

Lepidium virginicum var. menziesii [L.v. var. pubescens] wild peppergrass

Nasturtium officinale [Rorippa nasturtium-aquaticum]* water cress

Raphanus sativus* radish

Sisymbrium irio* London rocket

Sisymbrium orientale* hare's ear cabbage

CACTACEAE - CACTUS FAMILY

Cylindropuntia prolifera [Opuntia p.] coastal cholla

Opuntia ficus-indica* mission prickly-pear

Opuntia littoralis coastal prickly-pear

Opuntia x vaseyi mesa prickly-pear

CAMPANULACEAE - BELLFLOWER FAMILY

Lobelia dunnii var. serrata rothrock lobelia





Species

CAPRIFOLIACEAE - HONEYSUCKLE FAMILY

Lonicera subspicata var. denudata southern honeysuckle

CARYOPHYLLACEAE - PINK FAMILY

Polycarpon tetraphyllum ssp. tetraphyllum* four-leaved allseed

Silene gallica* small-flower catchfly

Spergularia villosa* hairy sand-spurrey

CHENOPODIACEAE - GOOSEFOOT FAMILY

Chenopodium album* lamb's quarters

Dysphania ambrosioides [Chenopodium a.]* Mexican tea

Dysphania botrys [Chenopodium b.]* Jerusalum oak

CONVOLVULACEAE - MORNING-GLORY FAMILY

Calystegia macrostegia large-bracted morning-glory

Cuscuta subinclusa canyon dodder

CRASSULACEAE - STONECROP FAMILY

Crassula connata pygmy-weed

Dudleya lanceolata lance-leaved dudleya / lanceleaf/ coastal dudleya / coastal live-forever

CUCURBITACEAE - GOURD FAMILY

Marah macrocarpus wild cucumber / chilicothe

EUPHORBIACEAE - SPURGE FAMILY

Chamaesyce albomarginata [Euphorbia a.] rattlesnake weed

Croton californicus California croton

Euphorbia lathyris* caper spurge / gopher spurge

Euphorbia peplus* petty spurge

Ricinus communis* castor bean

FABACEAE - LEGUME FAMILY

Acacia sp.* acacia

Acmispon americanus [Lotus purshianus] American lotus

Acmispon glaber var. glaber [Lotus scoparius var. scoparius] coastal deerweed

Acmispon heermannii var. heermannii [Lotus h. var. h.] southern woolly lotus

Lupinus excubitus grape soda lupine

Lupinus bicolor miniature lupine

Melilotus indica* sourclover

Spartium junceum* Spanish broom

FAGACEAE - OAK / BEECH FAMILY

Quercus agrifolia coast live oak

Quercus sp. oak

Erodium botrys* long-beaked filaree

Erodium cicutarium* red-stemmed filaree

GROSSULARIACEAE - GOOSEBERRY FAMILY

Ribes aureum golden currant

JUGLANDACEAE - WALNUT FAMILY

Juglans californica Southern California black walnut





Species

LAMIACEAE - MINT FAMILY

Marrubium vulgare* common horehound

Mentha spicata* spearmint

Salvia apiana white sage

Salvia columbariae chia

Salvia mellifera black sage

Stachys albens white hedge-nettle

MONTIACEAE - MONTIA FAMILY

Claytonia perfoliata ssp. perfoliata common miner's-lettuce

MORACEAE - FIG FAMILY

Ficus carica* edible fig

MYRSINACEAE - MYRSINE FAMILY

Anagallis arvensis* scarlet pimpernel

MYRTACEAE - MYRTLE FAMILY

Eucalyptus camaldulensis* river red gum

OLEACEAE - OLIVE FAMILY

Fraxinus sp. ash

ONAGRACEAE - EVENING-PRIMROSE FAMILY

Epilobium canum California fuchsia

Epilobium ciliatum willow-herb

Oenothera elata ssp. hirsutissima great marsh evening primrose

OROBANCHACEAE - BROOMRAPE FAMILY

Castilleja minor ssp. spiralis California threadtorch

PAPAVERACEAE - POPPY FAMILY

Eschscholzia californica California poppy

PHRYMACEAE - LOPSEED FAMILY

Mimulus aurantiacus bush monkeyflower

Mimulus cardinalis scarlet monkeyflower

Mimulus floribundus showy monkeyflower

Mimulus guttatus seep monkeyflower

PLANTAGINACEAE - PLANTAIN FAMILY

Keckiella cordifolia heart-leaved bush-penstemon

Plantago arenaria [P. indica]* sand plantain

Plantago lanceolata* English plantain

Plantago major* common plantain

Veronica anagallis-aquatica* water speedwell

PLATANACEAE - SYCAMORE FAMILY

Platanus racemosa western sycamore

POLEMONIACEAE - PHLOX FAMILY

Linanthus californicum [Leptodactylon c.] prickly phlox

Eriogonum elongatum var. elongatum long-stemmed wild buckwheat

Eriogonum fasciculatum California buckwheat

Persicaria lapathifolia [Polygonum lapathifolium] willow weed

Polygonum aviculare ssp. depressum [Polygonum common knotweed





Species

arenastrum]*

Rumex crispus* curly dock

Rumex salicifolius willow dock

PORTULACACEAE - PURSLANE FAMILY

Portulaca oleracea* common purslane

RHAMNACEAE - BUCKTHORN FAMILY

Ceanothus crassifolius hoaryleaf ceanothus

Ceanothus leucodermis chaparral whitethorn

Ceanothus spinosus greenbark ceanothus

Frangula californica [Rhamnus californica] California coffee berry

Rhamnus crocea spiny redberry

Rhamnus ilicifolia hollyleaf redberry

ROSACEAE - ROSE FAMILY

Adenostoma fasciculatum var. fasciculatum common chamise

Cercocarpus betuloides var. betuloides birch-leaf mountain-mahogany

Heteromeles arbutifolia toyon / Christmas berry

Prunus ilicifolia holly-leaved cherry

Rosa californica California rose

Rubus armeniacus* Himalayan blackberry

Rubus ursinus California blackberry

RUBIACEAE - MADDER FAMILY

Galium angustifolium narrowly leaved bedstraw

SALICACEAE - WILLOW FAMILY

Populus fremontii ssp. fremontii Fremont cottonwood

Salix gooddingii Goodding's black willow

Salix laevigata red willow

Salix lasiolepis arroyo willow

SAPINDACEAE - SOAP BERRY FAMILY

Acer macrophyllum big-leaf maple

SCROPHULARIACEAE - FIGWORT FAMILY

Verbascum thapsus* woolly mullein

Verbascum virgatum* wand mullein

SIMAROUBACEAE - QUASSIA FAMILY

Ailanthus altissima* tree of heaven

SOLANACEAE - NIGHTSHADE FAMILY

Datura wrightii jimson weed

Nicotiana glauca* tree tobacco

Solanum douglasii Douglas' nightshade

TAMARICACEAE - TAMARISK FAMILY

Tamarix ramosissima* saltcedar

URTICACEAE - NETTLE FAMILY

Urtica dioica ssp. holosericea hoary nettle





Species

MONOCOTYLEDONES - MONOCOTS

AGAVACEAE - CENTURY PLANT FAMILY

Agave americana* century plant

Hesperoyucca whipplei [Yucca w.] chaparral yucca

ARACEAE - ARUM FAMILY

Lemna sp. duckweed

CYPERACEAE - SEDGE FAMILY

Cyperus eragrostis tall umbrella-sedge

JUNCACEAE - RUSH FAMILY

Juncus macrophyllus long-leaved rush

Juncus oxymeris pointed rush

Juncus xiphioides iris-leaved rush

POACEAE - GRASS FAMILY

Arundo donax* giant reed

Avena fatua* wild oat

Bromus catharticus* rescue grass

Bromus diandrus* ripgut grass

Bromus hordeaceus* soft chess

Bromus madritensis ssp. rubens* red brome

Cynodon dactylon* bermuda grass

Echinochloa crus-galli* barnyard grass

Festuca myuros [Vulpia m.]* foxtail fescue

Hordeum murinum ssp. glaucum* smooth barley

Lamarckia aurea* goldentop

Melica imperfecta little California melic grass

Phalaris minor* little-seed canary grass

Polypogon monspeliensis* annual beard grass

Stipa miliacea [Piptatherum miliacea]* smilo grass

TYPHACEAE - CATTAIL FAMILY

Typha latifolia broad-leaved cattail

* non-native to the region it was found

ATTACHMENT B

SITE PHOTOGRAPHS

Special Status Plant Species Photographs Attachment BArroyo Seco Canyon Project

(12/17/13 MMD) R:\Projects\Carollo\J041\Graphics\Plant\Att_SP1.pdf

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Southern California black walnut in coastal sage scrub - chaparral ecotone. The walnut is the tall, pale green tree in background.

Southern California black walnut on a slope adjacent to the JPL parking lot.

Documents

ATTACHMENT C SPECIAL STATUS PLANT SURVEY REPORT B... · Pasadena in Los Angeles County, California (Exhibit 1). ... dog-walking, mountain biking, and other recreational activities