EcoFlora - Helianthus radula

Helianthus radula Torr. & Gray
Family: Asteraceae Rayless Sunflower [Helianthus apetalus Leconte ex Nutt.]	FNA Resources Edward E. Schilling in Flora of North America (vol. 21) Perennials, 50-100 cm (with crown buds). Stems erect, distally densely hispid. Leaves mostly basal; opposite; petioles obscure (intergrading with blades); blades obovate to orbiculate, 4.6-14.5 × 2.1-12 cm, bases broadly cuneate to rounded, margins entire or serrulate, abaxial faces strigoso-hispid, not gland-dotted (cauline usually much smaller, alternate distally). Heads usually borne singly. Peduncles 10-20 cm. Involucres shallowly hemispheric, (15-25 ×) 5-8 mm. Phyllaries (often dark purple) 25-33, lanceolate to ovate, 10-14 × 3-5 mm, apices acute to acuminate, abaxial faces hispid or glabrous. Paleae 9-10 mm, subentire to 3-toothed (apices purplish, mucronate). Ray florets 0 or 2-8; laminae (sometimes purplish) 1-2(-10) mm. Disc florets 100-150+; corollas 7-8 mm, lobes reddish; anthers dark, appendages dark. Cypselae 3-4 mm, glabrate; pappi of 2 (often unequal) aristate scales 0.5-2.9 mm. 2n = 34. Flowering fall. Sandy, open pine barrens, flatwoods; 0-50+ m; Ala., Fla., Ga., La., Miss., S.C.
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