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- Chorizanthe_valida 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.".
- Chorizanthe_valida binomialAuthority Sereno_Watson.
- Chorizanthe_valida class Eudicots.
- Chorizanthe_valida conservationStatus "G1".
- Chorizanthe_valida conservationStatusSystem "TNC".
- Chorizanthe_valida division Flowering_plant.
- Chorizanthe_valida family Polygonaceae.
- Chorizanthe_valida genus Chorizanthe.
- Chorizanthe_valida kingdom Plant.
- Chorizanthe_valida order Caryophyllales.
- Chorizanthe_valida order Eudicots.
- Chorizanthe_valida thumbnail Chorizanthe_valida.jpg?width=300.
- Chorizanthe_valida wikiPageExternalLink img_query?query_src=photos_index&where-taxon=Chorizanthe+valida.
- Chorizanthe_valida wikiPageExternalLink profile?symbol=CHVA.
- Chorizanthe_valida wikiPageExternalLink 31000.pdf.
- Chorizanthe_valida wikiPageExternalLink get_JM_treatment.pl?5936,5941,5980.
- Chorizanthe_valida wikiPageExternalLink florataxon.aspx?flora_id=1&taxon_id=250060101.
- Chorizanthe_valida wikiPageID "22047034".
- Chorizanthe_valida wikiPageRevisionID "536311320".
- Chorizanthe_valida binomial "Chorizanthe valida".
- Chorizanthe_valida binomialAuthority Sereno_Watson.
- Chorizanthe_valida familia Polygonaceae.
- Chorizanthe_valida genus "Chorizanthe".
- Chorizanthe_valida hasPhotoCollection Chorizanthe_valida.
- Chorizanthe_valida ordo Caryophyllales.
- Chorizanthe_valida regnum "Plantae".
- Chorizanthe_valida species "C. valida".
- Chorizanthe_valida status "G1".
- Chorizanthe_valida statusSystem "TNC".
- Chorizanthe_valida unrankedClassis Eudicots.
- Chorizanthe_valida unrankedDivisio Flowering_plant.
- Chorizanthe_valida unrankedOrdo Eudicots.
- Chorizanthe_valida subject Category:Chorizanthe.
- Chorizanthe_valida subject Category:Endangered_plants.
- Chorizanthe_valida subject Category:Endemic_flora_of_California.
- Chorizanthe_valida subject Category:Flora_of_the_San_Francisco_Bay_Area.
- Chorizanthe_valida subject Category:Natural_history_of_Marin_County,_California.
- Chorizanthe_valida subject Category:Plants_described_in_1877.
- Chorizanthe_valida subject Category:West_Marin.
- Chorizanthe_valida type EndangeredPlants.
- Chorizanthe_valida type LivingThing100004258.
- Chorizanthe_valida type Object100002684.
- Chorizanthe_valida type Organism100004475.
- Chorizanthe_valida type PhysicalEntity100001930.
- Chorizanthe_valida type Plant100017222.
- Chorizanthe_valida type PlantsDescribedIn1877.
- Chorizanthe_valida type Whole100003553.
- Chorizanthe_valida type Eukaryote.
- Chorizanthe_valida type Plant.
- Chorizanthe_valida type Species.
- Chorizanthe_valida type FloweringPlant.
- Chorizanthe_valida type Organism.
- Chorizanthe_valida comment "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.".
- Chorizanthe_valida label "Chorizanthe valida".
- Chorizanthe_valida sameAs m.05p3p49.
- Chorizanthe_valida sameAs Q5105134.
- Chorizanthe_valida sameAs Q5105134.
- Chorizanthe_valida sameAs Chorizanthe_valida.
- Chorizanthe_valida wasDerivedFrom Chorizanthe_valida?oldid=536311320.
- Chorizanthe_valida depiction Chorizanthe_valida.jpg.
- Chorizanthe_valida isPrimaryTopicOf Chorizanthe_valida.
