Turcz., Bull. Soc. Nat. Mosc. 24:174, t. 3 (1851).
Derivation: Generic name Isoetes and the Greek -opsis, appearance; as the habit resembles that of Isoetes.
Synonymy: Not Applicable
Common name: None
Tufted stemless annual herb; leaves basal, linear, erect.
Capitula sessile, axillary, crowded at the base of the plant, discoid, heterogamous; involucres ovoid; bracts at first herbaceous, becoming scarious, imbricate in 2 subequal series; receptacle flat, naked, pitted; outer florets female, 3- or 4-seriate, tubular; corollas conical with 3 or 4 minute acuminate lobes at the narrowed apex; style branches linear with subulate glabrous terminal appendages.
Achenes obconic, villous with shortly 2-fid hairs; pappus of large free scales; inner florets few, bisexual, sterile, tubular, 3- or 4-merous; corollas narrow below, abruptly campanulate; anthers obtuse at the base with prominent subulate apical appendages; style almost entire, papillose; achenes abortive, linear, glabrous; pappus absent.
Monotypic. (H. Robinson & R. D. Brettell (1973) Phytologia 26:73-75:)
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