About: Chorizanthe valida

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Chorizanthe valida is a rare species of flowering plant in the buckwheat family known by the common name Sonoma spineflower. It is endemic to West Marin, Marin County, California, where it is known from only one remaining natural population at Point Reyes National Seashore. It was thought to be extinct until 1980 when the Point Reyes population was discovered. Chorizanthe valida is a federally listed endangered species.

Attributes	Values
rdf:type	Thing eukaryote yago:LivingThing100004258 yago:Object100002684 yago:Organism100004475 yago:PhysicalEntity100001930 yago:Plant100017222 yago:Whole100003553 yago:WikicatEndangeredPlants yago:WikicatPlantsDescribedIn1877 umbel-rc:FloweringPlant
rdfs:label	Chorizanthe valida (en) Chorizanthe valida (pl) Chorizanthe valida (sv)
rdfs:comment	Chorizanthe valida S.Watson – gatunek rośliny z rodziny rdestowatych (Polygonaceae Juss.). Występuje endemicznie w południowo-zachodnich Stanach Zjednoczonych – w Kalifornii, w hrabstwie Marin. (pl) Chorizanthe valida är en slideväxtart som beskrevs av S. Wats.. Chorizanthe valida ingår i släktet Chorizanthe och familjen slideväxter. Inga underarter finns listade i Catalogue of Life. (sv) Chorizanthe valida is a rare species of flowering plant in the buckwheat family known by the common name Sonoma spineflower. It is endemic to West Marin, Marin County, California, where it is known from only one remaining natural population at Point Reyes National Seashore. It was thought to be extinct until 1980 when the Point Reyes population was discovered. Chorizanthe valida is a federally listed endangered species. (en)
foaf:depiction
dct:subject	Natural history of Marin County, California Point Reyes National Seashore Chorizanthe Critically endangered flora of California Endemic flora of California Endemic flora of the San Francisco Bay Area Natural history of the California chaparral and woodlands Plants described in 1877 Taxa named by Sereno Watson West Marin
Wikipage page ID	22047034 (xsd:integer)
Wikipage revision ID	1013135968 (xsd:integer)
Link from a Wikipage to another Wikipage	Endangered species Endemism Natural history of Marin County, California Point Reyes National Seashore Dune Introduced species Invasive species Ivory (color) West Marin Equestrianism Grazing Bract California coastal prairie Chorizanthe Wildfire Dredging Drought Abbotts Lagoon Cattle Critically endangered flora of California Endemic flora of California Endemic flora of the San Francisco Bay Area Natural history of the California chaparral and woodlands Plants described in 1877 Taxa named by Sereno Watson Hiking West Marin Marin County, California Pleistocene Point Reyes National Seashore Polygonaceae Sonoma County, California Inflorescence Mining Off-road vehicle Sereno Watson Extinction Xerophyte Yorkshire Fog
Link from a Wikipage to an external page	http://plants.usda.gov/java/profile%3Fsymbol=CHVA http://calphotos.berkeley.edu/cgi-bin/img_query%3Frel-taxon=begins+with&where-taxon=Chorizanthe+valida http://calphotos.berkeley.edu/cgi/img_query%3Fquery_src=photos_index&where-taxon=Chorizanthe+valida http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl%3F5936,5941,5980 http://ucjeps.berkeley.edu/eflora/eflora_display.php%3Ftid=19362 http://www.calflora.org/cgi-bin/species_query.cgi%3Fwhere-calrecnum=2059 http://www.efloras.org/florataxon.aspx%3Fflora_id=1&taxon_id=250060101 http://ucanr.org/sites/uccemarin/files/31000.pdf
sameAs	Chorizanthe valida Chorizanthe valida Chorizanthe valida Chorizanthe valida Chorizanthe valida Chorizanthe valida Chorizanthe valida Chorizanthe valida Chorizanthe valida
dbp:wikiPageUsesTemplate	dbt:Authority_control dbt:Reflist dbt:Short_description dbt:Speciesbox dbt:Taxonbar
thumbnail	wiki-commons:Special:FilePath/Chorizanthe_valida.jpg?width=300
authority	Sereno Watson
genus	Chorizanthe (en)
species	valida (en)
status	G1 (en)
status system	TNC (en)
has abstract	Chorizanthe valida is a rare species of flowering plant in the buckwheat family known by the common name Sonoma spineflower. It is endemic to West Marin, Marin County, California, where it is known from only one remaining natural population at Point Reyes National Seashore. It was thought to be extinct until 1980 when the Point Reyes population was discovered. Chorizanthe valida is a federally listed endangered species. This plant is erect in form, reaching up to about 30 centimeters tall. The inflorescence is a cluster of flowers with each flower surrounded by six reddish or gray bracts, each tipped with a straight awn. The awns are bright red when new and age ivory white. They are not hard or hooked in shape like those of many other Chorizanthe. The flower is a few millimeters long and white or pink in color. This rare plant once had a wider distribution; specimens were collected many decades ago in neighboring Sonoma County. Today it is limited to Point Reyes where there is one natural population at Abbotts Lagoon and one that has been reintroduced by humans near Bull Point. The number of individuals is variable. The local habitat is coastal prairie on deep, sandy soils. The soil, remnants of a Pleistocene dune system, can bear only drought-tolerant plants because it cannot retain much water. Research suggests that areas with grazing cattle contain a larger number of plants than areas where animals are excluded, but the plants in the exclusion areas are larger and have more flowers. Cattle do not eat the rare plant and may in fact help clear the land of invasive non-native plants, such as velvetgrass (Holcus lanatus). The land around Abbotts Lagoon is a cattle pasture today. This species occurs within the bounds of a protected National Seashore, so its habitat will not be developed, and it is protected from such activities as mining, dredging, and horseback riding activity. Threats that do remain include damage by hikers and off-road vehicles. The overall effects of cattle on the land are not certain; they may actually be a positive force in the life of the rare plant. The plant is limited to two relatively small populations, so any one severe event such as wildfire or drought could drive it to extinction. (en)

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