Helianthus microcephalus Torr. & A.Gray
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Asteraceae
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Scientific Name
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Description
Species Description - Fibrous-rooted perennial with crown-buds and a short (seldom over 5 cm) rhizome; stems (0.7–)1–2 m, glabrous and generally glaucous; lvs scabrous above, resinous-dotted and usually also loosely short-hairy beneath, sometimes also glaucous, lanceolate or lance-ovate, 7–15(–20) × (1–)2–5(–6) cm, toothed or entire, gradually tapering distally, ± abruptly narrowed to the 1–3 cm petiole; upper lvs alternate; heads on long, slender peduncles, small, the yellow disk 0.5–1 cm wide; invol bracts few, lanceolate, acuminate or attenuate, ciliolate, otherwise glabrous or nearly so; rays 5–8, 1–1.5 cm; 2n=34, 68. Woods and brushlands; N.J. to nw. Fla., w. to s. Minn., e. Ark., and se. La. Aug., Sept. (H. glaucus; H. smithii)
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Common Names
small-headed sunflower