Difference between revisions of "Eriogonum jamesii"

Bentham in A. P. de Candolle and A. L. P. P. de Candolle

in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. 14: 7. 1856.

Common names: Antelope sage
Treatment appears in FNA Volume 5. Treatment on page 367. Mentioned on page 333, 368, 369.
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FNA>Volume Importer
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Revision as of 20:10, 24 September 2019

Herbs or subshrubs, compact or spreading, matted, 0.5–2.5 × 3–15 dm, tomentose to floccose. Stems: caudex absent or spreading; aerial flowering stems erect, slender, solid, not fistulose, usually arising directly from a taproot, 0.5–1.5 dm, tomentose to floccose. Leaves basal, typically not in rosettes; petiole 0.5–6 cm, tomentose to floccose; blade usually narrowly elliptic, 1–3(–3.5) × (0.3–)0.5–1(–1.2) cm, densely tomentose abaxially, thinly tomentose, floccose or glabrous and grayish to greenish adaxially, margins entire, plane or undulate and crisped. Inflorescences umbellate or compound-umbellate, 10–30 × 10–25 cm; branches tomentose to floccose; bracts 3–9, semileaflike at proximal node, 0.5–2 × 0.2–1 cm, often scalelike distally. Involucres 1 per node, turbinate, 1.5–7 × 2–5 mm, tomentose to floccose; teeth 5–8, erect, 0.1–0.5 mm. Flowers 3–8 mm, including 0.7–2 mm stipelike base; perianth white to cream, densely pubescent abaxially; tepals dimorphic, those of outer whorl lanceolate to elliptic, 2–5 × 1–3 mm, those of inner whorl lanceolate to fan-shaped, 1.5–6 × 2–4 mm; stamens exserted, 2–4 mm; filaments pilose proximally. Achenes light brown to brown, 4–5 mm, glabrous except for sparsely pubescent beak.

Distribution

V5 753-distribution-map.gif

w North America, including Mexico.

Discussion

Varieties 3 (3 in the flora).

Eriogonum jamesii is a nectar source for the rare Spalding dotted-blue butterfly (Euphilotes spaldingi).

Eriogonum jamesii and E. arcuatum (see below) are considered “life medicines” and used ceremonially by Native Americans (C. Arnold, pers. comm.; A. B. Reagan 1929; P. A. Vestal 1952).

Selected References

None.

Key

1 Leaf margins undulate, frequently crisped; flowers 3-5(-6) mm; se Arizona, s New Mexico, sw Texas Eriogonum jamesii var. undulatum
1 Leaf margins plane, not crisped; flowers 4-8 mm; e Arizona, c and s Colorado, wc Kansas, New Mexico, w Oklahoma, n and w Texas > 2
2 Inflorescences compound-umbellate; e Arizona, c and s Colorado, New Mexico, w Oklahoma, n and w Texas Eriogonum jamesii var. jamesii
2 Inflorescences simple-umbellate; wc Kansas Eriogonum jamesii var. simplex