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• Taxonomy• Facts• Location of Chorizanthe
Valida• Physiological features
and flowering pattern• Endangered species list• References
Chorizanthe valida
Taxonomy• Kingdom: Plantae
Phylum: MagnoliophytaClass: MagnoliopsidaOrder: CaryouphyllalesFamily: PolygonaceaeGenus: ChorizantheSpecies: Chorizanthe valida
Facts about Chorizanthe valida• C. valida is a coastal plant found in sandy soil• C. valida is of the buckweed family• There are many species of chorizanthe
– 31 species are found in North America – 19 are found in South America
• Known as forb/herb- non-woody plant that is not a grass• Only one known population of C. valida, it is only found in
Point Reyes National Seashore.• At one time this species was believed to be extinct until it
was found in the 1980s
Where is chorizanthe valida found?
• It is endemic to Sonoma county.
• Meaning that this particular plant is only found in the northern part of California
• It is a colony within a coastal grassland
• Very rare!
Ecology and seedling dispersal• Seedlings establish in areas that are relatively free
from other competing native species.• C. valida found mild maritime climate, which usually
means that there is fog in the summer and rain in the winter
• Flowers between June and August based on weather patterns
• Has a peak blooming period of 3 weeks – During this time it emits a floral scent which attracts
honeybees, bumblebees, and wasps– Also during this time the flower begins to disintegrate and
the spiny seeds are disperse
Physiological and anatomical features• They are annuals meaning that they
grow for one year• This plant is a dicot • Root system consists of a slender tap-
root with small lateral roots• Stems- are either erect or prostrate
and are one to several from the base branched at the first node.– Stems could be from half to 5 dm long
and are usually stiff• Leaves – are basal
– Usually 2 to 10 cm long – Leaves are prone to fall in mature
plants• Pubescence – is seen when
unicellular white hairs begin to show
Problems chorizanthe valida is challenged with
• This species of chorizanthe is subject to cattle grazing. Which causes for the depletion in numbers.– Cattle trampling of seedlings is another cause for
the depletion of numbers in the species.– Changes in weather patterns – Land development could have led to the depletion
of mainland species of C.valida.
Organizations that have classified Chorizonthe valida as endangered
• The United States Fish and Wildlife Service has listed this species as endangered as of 1992
• IUCN Red list categorized this species as endangered
Recovery plans• In June of 1992 The United States Fish and Wildlife service
implemented a recovery plan which:– Stated that yearly monitoring would occur– Change in grazing patterns to a lesser amount – Seeds were introduced to three 2 x 2 meter plots within 100—
200 meters to create a higher amount of the species
• Then in March of 2009 they began a 5 year review of C. valida and 57 other species that are found in CA, AZ, UT, NV.– This is to see if it still belongs in the endangered species list or if
the species still exists for that matter.– This has to occur based on the Endangered Species Act of 1973
References
• http://upload.wikimedia.org/wikipedia/commons/thumb/e/e8/Chorizanthe_rigida_1.jpg/250px-Chorizanthe_rigida_1.jpg
• http://www.calflora.org/cgi-bin/species_query.cgi?where-calrecnum=2059
• http://www.jstor.org/stable/2394227?cookieSet=1
• http://www.fws.gov/ecos/ajax/docs/recovery_plan/980930d.pdf