Chaenactis glabriuscula, with the common name yellow pincushion, is a species of flowering plant in the daisy family. It is native to California and Baja California.[2]
| Chaenactis glabriuscula | |
|---|---|
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Scientific classification 
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| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Chaenactis |
| Species: | C. glabriuscula
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| Binomial name | |
| Chaenactis glabriuscula | |
| Synonyms[1] | |
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Synonymy
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Distribution and habitat
editChaenactis glabriuscula grows in a wide variety of habitats, such as the Sierra Nevada, the Mojave and Colorado Deserts, and the interior chaparral and woodlands, coastal sage and chaparral, and the montane chaparral and woodlands ecoregions. It is a variable plant, especially across varieties, of which there are many.[3] It is generally found below 7,000 feet (2,100 m) elevation.[4]
Description
editIn general, Chaenactis glabriuscula is an annual herb producing one or more mainly erect stems approaching 50 cm (20 inches) in maximum height. The branching stems are hairy and often cobwebby with fibers. The leaves are up to about 10 centimeters (4 inches) long, sometimes fleshy, and usually divided into many very small, curling lobes.
The inflorescence produces one to twenty or more flower heads on a very long, erect peduncle. The flower head is lined with flat, hairy or woolly glandular phyllaries 4.5–10 mm (0.18–0.39 in). It contains many tubular flowers in shades of gold to bright yellow, the outermost flowers large and flat-faced, most with protruding anthers. The fruit is an achene which may be over a centimeter long including its layered pappus of scales.[5][6]
- Chaenactis glabriuscula var. glabriuscula - from Tehama Co to Baja California
- Chaenactis glabriuscula var. heterocarpha (Torr. & A.Gray ex A.Gray) H.M.Hall - from Shasta Co to Ventura Co plus a few in Modoc Co + San Bernardino Co
- Chaenactis glabriuscula var. lanosa (DC.) H.M.Hall - from Fresno Co to San Diego Co
- Chaenactis glabriuscula var. megacephala A.Gray - from Shasta Co to Orange Co
- Chaenactis glabriuscula var. orcuttiana (Greene) H.M.Hall - coast from Ventura Co to Baja California
One variety, Chaenactis glabriuscula var. orcuttiana — Orcutt's yellow pincushion, is a rare variety limited to the beaches and coastal dunes of Southern California and Baja, where it is threatened by development of its coastal habitat.[7] Urban locations on the Santa Monica Bay, in the northern Ballona Wetlands near Venice and on the Bell Avenue Sand Dune Park recreation area's dune (~185 plants) in Manhattan Beach, each had var. orcuttiana populations newly discovered in Spring 2010.[8][9] The variety is listed by the California Native Plant Society as endemic to California dune ecosystems and significantly declining, with confirmed populations in parts of Ventura, Los Angeles and San Diego counties.[9]
References
edit- ^ a b The Plant List, Chaenactis glabriuscula DC.
- ^ Biota of North America Program 2014 county distribution map
- ^ a b Calflora taxon report, University of California, Chaenactis glabriuscula DC. common yellow chaenactis, yellow pincushion
- ^ Sullivan, Steven. K. (2018). "Chaenactis glabriuscula". Wildflower Search. Retrieved 2018-07-30.
- ^ Flora of North America, Fremont or desert pincushion, pincushion flower, Chaenactis fremontii A. Gray
- ^ "Chaenactis glabriuscula". in Jepson Flora Project (eds.) Jepson eFlora. Jepson Herbarium; University of California, Berkeley. 2018. Retrieved 2018-07-06.
- ^ California Native Plant Society
- ^ Louis Sahagun (March 19, 2010). "Discovery of rare wildflower in Ballona Wetlands could halt recreation project". Los Angeles Times.
- ^ a b Kristin S. Agostoni (May 16, 2010). "Rare plant species discovered at Sand Dune Park". Daily Breeze News.access date:05/17/2010
External links
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Media related to Chaenactis glabriuscula at Wikimedia Commons- Flora of North America; Chaenactis glabriuscula
- Chaenactis glabriuscula - Photo gallery
