Heliopsis
heliopsis, héliopside, oxeye, sunflower everlasting
erect or trailing, branched from bases or ± throughout.
cauline; opposite;
petiolate;
blades ± 3-nerved from bases, deltate or ovate to lanceolate, bases ± cuneate to subtruncate, margins serrate or coarsely toothed, faces glabrous or hairy.
turbinate to hemispheric, 8–14 mm diam.
convex to conic, paleate (paleae tardily falling, yellowish, conduplicate, becoming chartaceous).
[0] 5–20, pistillate, fertile;
corollas yellow to orange (laminae persistent, sessile, becoming papery).
30–150+, bisexual, fertile;
corollas yellow or brown to purple, tubes much shorter than narrowly cylindric throats, lobes 5, deltate.
persistent, 12–20 in 2–3 series (ovate or oblong, ± equal, outer more foliaceous than inner).
radiate [discoid], borne singly.
(brown to black-brown) subterete or obscurely 3(ray)- or 4(disc)-angled (not winged);
pappi 0, or persistent, coroniform (each a laciniate crown plus 1–3 toothlike scales).
= 14.
Heliopsis
Species ca. 18 (3 in the flora).
Most species of Heliopsis are known only from Mexico.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
1. Aerial stems 1–2+ (from creeping rhizomes 4–10+ cm × 1–2 mm, rhizome internodes ca. 20+ mm); heads 1–3(–5); rays 6–8(–13) | H. gracilis |
1. Aerial stems 1–10+ (from ± erect caudices, or from creeping rhizomes to 4 cm × 2–6 mm, rhizome internodes 2–10 mm); heads 1–15+; rays 9–18 | → 2 |
2. Leaf blades (1.5–)3–6 × 0.8–3 cm, faces sparsely pubescent to glabrescent; peduncles (6–)15–30 cm; cypselae rugulose to subtuberculate | H. parvifolia |
2. Leaf blades 6–12(–15) × 2.5–6(–12) cm, faces glabrous, pubescent, or scabrous; peduncles 9–25 cm; cypselae smooth | H. helianthoides |
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USDA Plants Database
