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FNA | Family List | FNA Vol. 19, 20 and 21 | Asteraceae

132. Ismelia Cassini in F. Cuvier, Dict. Sci. Nat. ed. 2. 41: 40. 1826.

[Etymology unknown]

John L. Strother

Annuals, 10–30(–50+) cm. Stems 1, erect, usually branched distally, glabrous or sparsely hairy (hairs basifixed). Leaves mostly cauline; alternate; petiolate or sessile; blades obovate to oblong (bases sometimes clasping), usually 2-pinnately lobed, ultimate margins usually dentate, rarely entire, faces glabrous. Heads radiate, borne singly or in 2s or 3s. Involucres hemispheric or broader, 12–25+ mm diam. Phyllaries persistent, 20–30+ in 2–3 series, distinct, ovate or obovate to lance-deltate or lanceolate (± carinate), unequal, margins and apices scarious (tips of inner often ± dilated). Receptacles convex to conic, epaleate. Ray florets 13–21+, pistillate, fertile; corollas proximally white or red to purple, distally yellow or white, laminae ± linear. Disc florets 80–150+, bisexual, fertile; corollas proximally ochroleucous, distally red to purple, tubes cylindric (stipitate-glandular or gland-dotted), throats funnelform, lobes 5, deltate. Cypselae dimorphic: outer 3-angled (each angle ± winged, wings not spine-tipped); inner compressed, adaxial angles ± winged (wings not spine-tipped); ribs 0, faces glabrous (pericarps without myxogenic cells or resin sacs); pappi 0. x = 9.

Species 1: introduced; n Africa; widely adventive elsewhere.

Lower Taxon


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