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Hort 28 McConnell Arboretum and Gardens. Perovskia atriplicifolia , Russian sage. Perovskia atriplicifolia , Russian sage. Native to w. and central Asia - PowerPoint PPT Presentation
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Hort 28 McConnell
Arboretum and Gardens
Perovskia atriplicifolia, Russian sage
Perovskia atriplicifolia, Russian sage
• Native to w. and central Asia• ID: woody-based clump 4 ft x 4 ft with
many upright stems; lvs gray-green, opposite, aromatic, lower are deeply cut, upper merely toothed; flrs in sprays, make a purple haze
• Value: long-lasting haze of purple bloom (June to frost), heat and drought tolerant, sun tolerant
• Care: trim spent blossoms to extend bloom; little water; can be invasive in some areas
Solanum laxum, potato vinenightshade family--Solanaceae
Vine for fence, trellisAt edge of its hardiness in Redding—may be killed in cold winterPoisonous foliage (all nightshades) and fruits (some nightshades)
Solanum laxum, potato vinenightshade family--Solanaceae
Rosa chinensis ‘Mutabilis’China rose
rose family--Rosaceae
Rosa chinensis ‘Mutabilis’• 4-ft shrub, may climb if supported• Flowers single, change color, borne all
summer ‘til frost• Good low-care rose for mixed shrub
border
Rosa ‘Sally Holmes’Roses have alternate, pinnately compound leaves WiTH STIPULESNodal spines, internodal prickles
Single ‘wild-type’ roses have 5 petals, 5 sepals, numerous stamens surrounding a cluster of simple pistils; fruit is a rose hip
x Chitalpa tashkentensis ‘Pink Dawn’catalpa family--Bignoniaceae
x Chitalpa tashkentensis ‘Pink Dawn’
• Intergeneric hybrid between Chilopsis (desert willow) and Catalpa; combines drought tolerance with large flowers
• ID: Decidous tree 20-30 x 20-30ft; leaves long and narrow; flowers tubular, in clusters
• Value: drought tolerant, flowers, shade• Problems: messy• Care: Do not overwater
Vitex agnus-castus, Chaste treemint family--Lamiaceae
Vitex agnus-castus, Chaste tree• Native to Europe• Name means “chaste lamb”; vitex refers to
plaiting, as in fences• ID: arborescent shrub to 25 ft; shrubby perennial
where colder; clusters of purple flowers; lvs aromatic, gray-green, palmately compound
• Value: flowers all season, nice leaves, handle as a shrub or small tree, can be underplanted; takes moderate wate, resists oak root fungus
• Care: moderate water; prune as desired (blooms on new growth)
Spiraea douglasii, Douglas spiraea,rose family--Rosaceae
Native to PNW (N. Cal to BC)ID: deciduous shrub to 6 ft x 20 ft; tall narrow pink flower clusters; lvs narrow, to 3.5 in., green above and velvety white beneathValue: takes swampy conditions, wild plantings near streams; has pink flrs; Native Americans used for arrow shafts, digging sticksCare: Likes moisture, acid soil; can be invasive in moist situation
Spiraea douglasii, Douglas spiraea,rose family--Rosaceae
Amorpha californica, California false indigo
pea family--Fabaceae
• Shrubs, 6-8 ft• Purple flower stalks
with orange stamens• Tiny erect pea pods• Pinnately compound
leaves
California false indigo, Amorpha californica
• Food plant for California dogface butterfly (state butterfly)
Calycanthus occidentalis, western spicebush
Spicebush family--Calycanthaceae
George Hartwell
Calycanthus occidentalis, Western spicebush
• Deciduous shrub, can become large and rangy; prune to control size, but will sacrifice one year’s flowers
• Spicy odor; some smell fishy, purchase or propagate when in bloom to be sure
• Grows in foothills around Shasta Lake, Whiskeytown Lake
Calycanthus occidentalis, Western spicebush
• Native to California and north, growing along streambanks or moist hillsides
• ID: deciduous shrub, 10 x 10 ft; ovate, entire, aromatic leaves; magnolia-like maroon flowers
• Value: good in shade, nice flowers, nice winter fruits, yellow fall color
• Care: moderate water; blooms on current season’s growth; remove crowded stems annually
• Warning: Seeds can cause convulsions
Woodwardia fimbriata, giant chain fern
Woodwardia fimbriata, giant chain fern
Native to California, along streamsID: deciduous fern to 5 ft (can be 9 ft!); leaves pinnately divided (how many times??); no flowers (ferns reproduce by sporesValue: gorgeous green fern, not invasiveCare: partial to full shade; needs water; use near pond, a shaded wall, even shaded seep in desert
Fern Life Cycle
Verbena bonariensis, tall verbenaVerbena family--Verbenaceae
• Opposite leaves narrow & scratchy
• Tall, ‘see through’• Prolific seeder
Verbena bonariensis, tall verbena
Verbena bonariensis, tall verbena
• Native to South America; naturalized in parts of California…
• ID: wispy shrub, 6 x 3 ft, airy branching stems; flrs tubular, purple, in dense clusters; lvs mostly basal
• Value: drought and heat tolerant; airy quality, purple flrs
• Care: little water, deadhead for rebloom; self sows freely…
Vitis californica, California wild grape
• Riparian forest is relict of 20 million years ago
• Trees winter deciduous• Makes good farmland, so
90%+ now converted for agriculture
• Wild grape, Vitis californica, along stream corridors below 4000 ft. elev. is an indicator of this habitat
• ‘Roger’s Red’ is a hort form
Vitis californica, California wild grape
Buddleia x weyeriana ‘Honeycomb’, Honeycomb butterfly bush
Scrophulariaceae
Buddleia x weyeriana ‘Honeycomb’, Honeycomb butterfly bush
• Large, semi-evergreen shrub that attracts butterflies
• Takes moderate water, sun• Prune after bloom, by cutting out the
oldest stems at the base of the plant• This is one of the better butterfly bushes,
that fills a gap in bloom, is fragrant, and is long lasting without too much deadheading
Buddleia davidii, butterfly bushScrophulariaceae
Buddleia davidii, butterfly bushScrophulariaceae
Rhus lancea, African sumac, Anacardiaceae—Cashew family
Rhus lancea, African sumac, Anacardiaceae—Cashew family
From South Africa, called “Karee”
Extremely drought-tolerant tree or large shrub
Dioecious--sexes separate, pollen allergenic
Requires some fussing to look its best (suckers)
Fruit is edible and has been used to make beer
Abelia x grandiflora, Glossy abelia, Caprifoliaceae; honeysuckle family
• Cross between two Chinese species
• Grows 8 x 5 ft. Evergreen or semi-evergreen: loses leaves at 15 F., freezes to ground at 0 F (but does not die); fruit clusters interesting, flrs. white and fragrant, bloom summer and fall
• Leaves opposite!!
Platanus racemosa, California sycamore
• leaf lobes entire,• very hairy
underneath; • fruits spherical,
zigzag on stalk
Platanus racemosa, California sycamore
Artemisia ‘Powis Castle’sunflower family--Asteraceae
Artemisia ‘Powis Castle’sunflower family--Asteraceae
Philadelphus lewisii, wild mock orangehydrangea family--Hydrangeaceae
Philadelphus lewisii, wild mock orange
• Arching branches• Opposite leaves
with widely spaced teeth, 3-veined from the base
• 4-petaled fragrant flowers
• Blooms on last year’s wood
Clerodendrum bungei, Cashmere Bouquet
mint family--Lamiaceae
Clerodendrum bungei, Cashmere Bouquet
mint family--Lamiaceae
•Tropical look•Needs regular water, shade
•Large opposite leaves with distinctive odor
Erigeron karvinskianus, Santa Barbara daisy
sunflower family--Asteraceae
•Pink and white daisies with yellow centers
•Drought tolerant, full sun
•Mounded form
Erigeron karvinskianus, Santa Barbara daisy
Ulmus glabra ‘Camperdownii’, Camperdown elm
elm family--Ulmaceae
Ulmus glabra ‘Camperdownii’, Camperdown elm
•Large trees, weeping•Leaves double-toothed, edges not meeting at base (oblique or asymmetric base); very rough to touch
•Branches will touch ground
Hydrangea macrophyllaBigleaf Hydrangea
Hydrangea macrophylla Bigleaf Hydrangea
• Opposite leaves• 6 inches long• Simple leaves
Hydrangea macrophylla Bigleaf Hydrangea
• Inflorescence is a corymb
• Bloom color affected by soil pH.
• Acidic soil (pH below 6) flowers are blue
• Alaline soil (pH above 6) flowers are pick