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105. Eriogonum longifolium Nuttall, Trans. Amer. Philos. Soc. n. s. 5: 164. 1835.
Herbs, 3-20 × 1.5-8 dm, tomentose or nearly glabrous. Aerial flowering stems erect, 2-17 dm, occasionally finely striated or grooved. Leaves: petiole 5-20 cm; blade lanceolate or oblanceolate to oblong, 0.5-20 × 0.3-2.5(-3) cm, tomentose abaxially, less so to floccose or glabrous adaxially. Inflorescences 5-50(-80) × 5-50 cm; bracts 3, scalelike, usually triangular, 1-5 mm. Peduncles 0.3-3 cm, thinly tomentose or nearly glabrous. Involucres turbinate to campanulate, 3-7 × 1.5-6 mm; teeth 0.2-0.8 mm. Flowers 5-15 mm, including (0.5-)1-4(-7) mm stipelike base; perianth yellow, densely white- to silvery-tomentose abaxially; tepals monomorphic, lanceolate to narrowly elliptic; stamens 1.7-2.5 mm; filaments glabrous. Achenes brown, 4-6 mm, densely tomentose.
Varieties 3 (3 in the flora): e North America.
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| 1 |
Flowers 8-15 mm, including 2-4(-7) mm stipelike base; involucres 6-7 mm; c Florida |
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105c var. gnaphalifolium |
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Flowers 5-11 mm, including 0.5-2.5 mm stipelike base; involucres 3-6 mm; not of c Florida |
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(2) |
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| 2 (1) |
Involucres 4-6 mm; flowers 5-11 mm, including (0.5-)1-2.5 mm stipelike base; s Arkansas, s Kansas, wc Louisiana, sw Missouri, se New Mexico, Oklahoma, Texas |
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105a var. longifolium |
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Involucres 3-3.5 mm; flowers 5-7 mm, including 0.5-1(-1.2) mm stipelike base; nw Alabama, c Kentucky, sc Tennessee |
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105b var. harperi |
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Treatments in Other Floras @ www.efloras.org
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