Comments
(
anglais
)
fourni par 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.
- licence
- cc-by-nc-sa-3.0
- droit d’auteur
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Description
(
anglais
)
fourni par 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.
- licence
- cc-by-nc-sa-3.0
- droit d’auteur
- Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
Comprehensive Description
(
anglais
)
fourni par 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.
- citation bibliographique
- Per Axel Rydberg. 1914. (CARDUALES); CARDUACEAE; HELENIEAE. North American flora. vol 34(1). New York Botanical Garden, New York, NY
Comprehensive Description
(
anglais
)
fourni par 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. ■
- citation bibliographique
- Per Axel Rydberg. 1914. (CARDUALES); CARDUACEAE; HELENIEAE. North American flora. vol 34(1). New York Botanical Garden, New York, NY
Comprehensive Description
(
anglais
)
fourni par 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.
- citation bibliographique
- Per Axel Rydberg. 1914. (CARDUALES); CARDUACEAE; HELENIEAE. North American flora. vol 34(1). New York Botanical Garden, New York, NY
Chaenactis glabriuscula
(
anglais
)
fourni par 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. 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
-
^ 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
- licence
- cc-by-sa-3.0
- droit d’auteur
- Wikipedia authors and editors
Chaenactis glabriuscula: Brief Summary
(
anglais
)
fourni par 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.
- licence
- cc-by-sa-3.0
- droit d’auteur
- Wikipedia authors and editors
Chaenactis glabriuscula
(
espagnol ; castillan
)
fourni par wikipedia ES
![src=]()
Detalle de tallos florales
Chaenactis glabriuscula, conocida como "yellow pincushion" (acerico amarillo), es una especie de plantas de la familia Asteraceae nativa de California y Baja California.[2]
Descripción
En general, se comporta como planta anual, llega a alcanzar 60 cm de altura. Se ramifica poco, entre 1 a 5 tallos grisáceos o blanquecinos, erguidos o a veces postrados, presentan aspecto piloso, con lanosidad o glabros. Las hojas, a veces carnosas, son pinnadas, con los folíolos más cercanos al ápice muy pequeños y rizados. Pueden medir hasta 10 centímetros de largo.
La inflorescencia, que surge en cimas terminales con tallos de unos 20 cm de largo es, como en todas las asteráceas, un capítulo de flores liguladas (hasta 30), las más externas grandes y planas, y las internas con anteras sobresalientes. Las corolas son de color amarillo brillante a dorado. El fruto es un aquenio que puede tener más de un centímetro de largo, incluyendo sus vilanos (o papus) en capas de escamas.[3] Florece de abril a junio.[4]
Variedades
Chaenactis glabriuscula var. orcuttiana es una variedad clasificada como endémica del ecosistema de dunas por la Native Plant Society de California con poblaciones confirmadas en partes de los condados de Ventura, Los Ángeles y San Diego. Su hábitat se limita a las playas y dunas costeras del sur de California y Baja California, donde se encuentra amenazada por la erosión producida por el tráfico humano. En los emplazamientos urbanos en la bahía de Santa Mónica, en los humedales del norte de Ballona, cerca de Venecia, y en la duna del área recreativa de Bell Avenue Sand Dune Park (~185 plantas) en Manhattan Beach, se descubrieron poblaciones de esta variedad en la primavera de 2010.[6][7]
Distribución y hábitat
Chaenactis glabriuscula crece en una amplia variedad de hábitats, como Sierra Nevada, los desiertos de Mojave y Colorado, el chaparral interior y los bosques, la zona costera y el chaparral, y las ecorregiones de chaparral montano y los bosques de California.[5]
Crece en lugares secos, sobre terrenos arenosos y de serpentina.
Referencias
- licence
- cc-by-sa-3.0
- droit d’auteur
- Autores y editores de Wikipedia
Chaenactis glabriuscula: Brief Summary
(
espagnol ; castillan
)
fourni par wikipedia ES
![src=]()
Detalle de tallos florales
Chaenactis glabriuscula, conocida como "yellow pincushion" (acerico amarillo), es una especie de plantas de la familia Asteraceae nativa de California y Baja California.
- licence
- cc-by-sa-3.0
- droit d’auteur
- Autores y editores de Wikipedia
Chaenactis glabriuscula
(
vietnamien
)
fourni par wikipedia VI
- licence
- cc-by-sa-3.0
- droit d’auteur
- Wikipedia tác giả và biên tập viên
Chaenactis glabriuscula: Brief Summary
(
vietnamien
)
fourni par wikipedia VI
Chaenactis glabriuscula là một loài thực vật có hoa trong họ Cúc. Loài này được DC. mô tả khoa học đầu tiên năm 1836.
- licence
- cc-by-sa-3.0
- droit d’auteur
- Wikipedia tác giả và biên tập viên
