dcsimg
Image of Orcutt's yellow pincushion
Creatures » » Plants » » Dicotyledons » » Composite Family »

Yellow Pincushion

Chaenactis glabriuscula DC.

Comments

provided by eFloras
The diverse and intergrading forms here included in Chaenactis glabriuscula have been divided by P. Stockwell (1940) and subsequent workers into as many as four species and ten varieties. Chaenactis glabriuscula is known from the southern two-thirds of the Californian Floristic Province and adjacent desert edges. It has been reported in Massachusetts as a garden escape (variety unspecified); it is not expected to persist there outside cultivation.

Complete interfertility among the taxa recognized here as Chaenactis glabriuscula vars. glabriuscula, megacephala, and lanosa was demonstrated by P. Stockwell (1940). Intraspecific crosses involving C. glabriuscula var. orcuttiana were much less successful; C. glabriuscula var. heterocarpha was not tested. As noted by W. J. Hooker and G. A. W. Arnott ([1830–]1841) and D. W. Kyhos (1965), some forms of C. glabriuscula differ from C. stevioides or C. fremontii only in corolla color, which can be lost in older or poorly preserved specimens.

license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 21: 409, 411 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Description

provided by eFloras
Plants 6–60 cm; proximal indument grayish to whitish, arachnoid to densely lanuginose, or glabrescent. Stems mostly 1–5(–12; sometimes ± horizontal); branches proximal and, often, distal. Leaves basal (often withering) and cauline, 1–10 cm; largest blades linear or ± elliptic, plane to 3-dimensional, succulent or not, (0–)1–2-pinnately lobed; primary lobes 1–7 pairs, remote to ± congested, ultimate lobes ± plane, involute, twisted, and/or terete. Heads (± radiant) mostly 1–20+ per stem. Peduncles 1–20(–30) cm, distally stipitate-glandular, ± villous, arachnoid-sericeous, lanuginose, and/or glabrescent. Involucres ± hemispheric to obconic or broadly cylindric. Phyllaries: longest 4.5–10 mm; outer stipitate-glandular, ± villous, arachnoid-sericeous, lanuginose, and/or glabrescent in fruit, apices erect, blunt, ± rigid. Florets: corollas bright to dark yellow, 4–8 mm (inner); peripheral corollas spreading, ± zygomorphic, enlarged. Cypselae 3–9 mm (± terete); pappi of (1–)4 scales in 1 series, or of (5–)8 scales in 2, abruptly unequal series, longest scales (1–)2–8 mm. 2n = 12.
license
cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 21: 409, 411 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
project
eFloras.org
original
visit source
partner site
eFloras

Comprehensive Description

provided by North American Flora
Chaenactis glabriuscula DC. Prodr. 5: 659. 1836
Chaenactis glabriuscula megacephala A. Gray, in Terr. Pacif. R. R. Rep. 4: 104. 1857.
A leafy annual; stem 1.5-5 dm. high, commonly branched above; branches ascending; leaves once or twice pinnately divided into linear lobes or the upper entire, 5-10 cm. long, thinly floccose, in age glabrate; peduncles 3-8 cm. long; involucre 8-10 mm. high, 10-15 mm. broad; bracts 15-18, broadly linear or oblong, obtuse, thinly floccose; corollas yellow, pubescent, the central ones about 6 mm. long, the marginal with ampliate palmate limb, 4—5 mm. long; achenes about 5 mm. long, hirsute; squamellae of the central flowers linear-lanceolate, acute, nearly as long as the corollas, those of the marginal flowers usually less than half as long and obtuse.
Type locality: California.
Distribution: Washington to southern California.
license
cc-by-nc-sa-3.0
bibliographic citation
Per Axel Rydberg. 1914. (CARDUALES); CARDUACEAE; HELENIEAE. North American flora. vol 34(1). New York Botanical Garden, New York, NY
original
visit source
partner site
North American Flora

Comprehensive Description

provided by North American Flora
Chaenactis tenuifolia Nutt. Trans. Am. Phil. Soc. II. 7: 375
1841.
Chaenactis filifolia Harv. & Gray; A. Gray, Mem. Am. Acad. II. 4: 98. 1849. Chaenactis glabriuscula tenuifolia H. M. Hall, Univ. Calif. Publ. Bot. 3: 191. 1907.
A slender winter annual; stem simple up to the inflorescence, sparingly floccose; leaves 4—6 cm. long, bipinnatifid into linear-filiform divisions; peduncles 1-5 cm. long; involucre 5-6 mm. high, 8-10 mm. broad; bracts 20-25, narrowly linear, acute, rather thick, floccose as well as glandular-granuliferous; corollas yellow, the central ones about 5 mm. long, those of the margin somewhat enlarged, with obliquely funnelform, 5-lobed limb; squamellae lanceolate to ovate, acute or obtuse, those of the central flowers 3-4 mm. long, those of the marginal ones much shorter (C filifolia is a slender form with shorter pappus).
Type locality: St. Diego, California.
Distribution: Southern California and Lower California. ■
license
cc-by-nc-sa-3.0
bibliographic citation
Per Axel Rydberg. 1914. (CARDUALES); CARDUACEAE; HELENIEAE. North American flora. vol 34(1). New York Botanical Garden, New York, NY
original
visit source
partner site
North American Flora

Comprehensive Description

provided by North American Flora
Chaenactis aurea Greene, sp. nov
An annual; stem branched at the base, with ascending branches, about 2 dm. high, more or less floccose and purple-tinged ; leaves alternate, 3-5 cm. long, pinnatifid with linear, entire or cleft divisions, usually decidedly floccose; heads at the ends of branches 3-6 cm. long; involucre broadly turbinate, about 8 mm. high and 10 mm. broad; corollas golden-yellow, 5 mm. long, the marginal ones only slightly enlarged and oblique; achenes 4.5 mm. long, appressed-hirsute ; squamellae lanceolate, unequal, 3-5 mm. long.
Type collected on Wilson's Peak, California, 1901, Le Roy Abrams 1890 (herb. E. L. Greene). Distribution: Southern California.
license
cc-by-nc-sa-3.0
bibliographic citation
Per Axel Rydberg. 1914. (CARDUALES); CARDUACEAE; HELENIEAE. North American flora. vol 34(1). New York Botanical Garden, New York, NY
original
visit source
partner site
North American Flora

Chaenactis glabriuscula

provided by wikipedia EN

Chaenactis glabriuscula var. glabriuscula, western Antelope Valley, California

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]

Distribution and habitat

Chaenactis 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

In 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]

Varieties[1][3]

One variety, Chaenactis glabriuscula var. orcuttianaOrcutt'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

  1. ^ a b The Plant List, Chaenactis glabriuscula DC.
  2. ^ Biota of North America Program 2014 county distribution map
  3. ^ a b Calflora taxon report, University of California, Chaenactis glabriuscula DC. common yellow chaenactis, yellow pincushion
  4. ^ Sullivan, Steven. K. (2018). "Chaenactis glabriuscula". Wildflower Search. Retrieved 2018-07-30.
  5. ^ Flora of North America, Fremont or desert pincushion, pincushion flower, Chaenactis fremontii A. Gray
  6. ^ "Chaenactis glabriuscula". in Jepson Flora Project (eds.) Jepson eFlora. Jepson Herbarium; University of California, Berkeley. 2018. Retrieved 2018-07-06.
  7. ^ California Native Plant Society
  8. ^ Louis Sahagun (March 19, 2010). "Discovery of rare wildflower in Ballona Wetlands could halt recreation project". Los Angeles Times.
  9. ^ a b Kristin S. Agostoni (May 16, 2010). "Rare plant species discovered at Sand Dune Park". Daily Breeze News.access date:05/17/2010

license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
partner site
wikipedia EN

Chaenactis glabriuscula: Brief Summary

provided by wikipedia EN
Chaenactis glabriuscula var. glabriuscula, western Antelope Valley, California

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.

license
cc-by-sa-3.0
copyright
Wikipedia authors and editors
original
visit source
partner site
wikipedia EN