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Silky Raillardella

Raillardella argentea (A. Gray) A. Gray

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Raillardella argentea occurs widely in the Sierra Nevada and southern Cascade Range and locally in the Klamath Ranges, San Bernardino Mountains (Mt. San Gorgonio), and western ranges of the Great Basin. Artificial hybrids with R. pringlei are completely fertile and vigorous (D. W. Kyhos et al. 1990); the two species are not known to co-occur in nature.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 21: 257, 258 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Description

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Plants 1–15 cm. Leaf blades ob-lanceolate, margins entire or toothed, faces sericeous (silvery), sometimes sparsely stipitate-glandular as well. Ray florets 0. Disc florets 7–26; corollas yellow, 6–11 mm. 2n = 34, 36.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 21: 257, 258 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
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eFloras.org
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Synonym

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Railliardia argentea A. Gray, Proc. Amer. Acad. Arts 6: 550. 1865 (as Raillardia)
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 21: 257, 258 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
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Comprehensive Description

provided by North American Flora
Raillardella argentea A. Gray, Bot. Calif. 1: 417. 1876
Raillardia argentea A. Gray, Proc. Am. Acad. 6: 550. 1865.
A subacaulescent perennial, with a woody caudex; leaves basal, linear-oblanceolate or linear, acute, 2-5 cm. long, 3-6 mm. wide; scape 5-10 cm. high, glandular-puberulent; head discoid; involucre obconic, 12-15 mm. high, 8-10 mm. broad; bracts 7-15, linear, often purpletinged, acute, glandular-puberulent and often also glandular-hirsute; flowers 7-20, all hermaphrodite and fertile; corolla yellow, about 1 cm., the tube subcylindric, equaling and gradually expanding into the cylindric throat, the lobes oblong-lanceolate, 1 mm. long; anthers 4 mm. long, subcordate at the base, with lance-oblong appendages at the apex; style-branches 4 mm. long; achenes 6 mm. long or more, silky-pubescent; pappus-bristles white, 8 mm. long.
Type locality: Sonora Pass. California.
Distribution: High mountains from southern Oregon to southern California.
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bibliographic citation
Per Axel Rydberg. 1927. (CARDUALES); CARDUACEAE; LIABEAE, NEUROLAENEAE, SENECIONEAE (pars). North American flora. vol 34(4). New York Botanical Garden, New York, NY
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Raillardella argentea

provided by wikipedia EN

Raillardella argentea is a species of flowering plant in the family Asteraceae known by the common name silky raillardella.[1] It is native to the Sierra Nevada and nearby mountain ranges of California, its distribution extending east into Nevada and north along the Cascade Range and Klamath Mountains into Oregon. It grows in many types of dry, open mountain habitat. It is a rhizomatous perennial herb growing in a clump of rosetted basal leaves. The leaves are lance-shaped, up to 8 centimeters long, and coated in silky hairs. The plant produces an inflorescence up to about 15 centimeters tall consisting of a solitary flower head which is cylindrical to somewhat bell-shaped. The head is enclosed in the fused outer scales of the flowers, which look similar to the phyllaries of many other species' flower heads. The head contains many yellow disc florets up to a centimeter long each, and no ray florets. The fruit is a long, narrow achene which may be 2 centimeters in length including its plumelike pappus.

References

  1. ^ USDA, NRCS (n.d.). "Raillardella argentea". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 18 October 2015.

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Raillardella argentea: Brief Summary

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Raillardella argentea is a species of flowering plant in the family Asteraceae known by the common name silky raillardella. It is native to the Sierra Nevada and nearby mountain ranges of California, its distribution extending east into Nevada and north along the Cascade Range and Klamath Mountains into Oregon. It grows in many types of dry, open mountain habitat. It is a rhizomatous perennial herb growing in a clump of rosetted basal leaves. The leaves are lance-shaped, up to 8 centimeters long, and coated in silky hairs. The plant produces an inflorescence up to about 15 centimeters tall consisting of a solitary flower head which is cylindrical to somewhat bell-shaped. The head is enclosed in the fused outer scales of the flowers, which look similar to the phyllaries of many other species' flower heads. The head contains many yellow disc florets up to a centimeter long each, and no ray florets. The fruit is a long, narrow achene which may be 2 centimeters in length including its plumelike pappus.

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