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

39. Ixeris (Cassini) Cassini in F. Cuvier, Dict. Sci. Nat. ed. 2. 25: 62. 1822.

[No etymology in protologue]

John L. Strother

Taraxacum F. H. Wiggers subg. Ixeris Cassini, Bull. Sci. Soc. Philom. Paris 1821: 173. 1821

Perennials [annuals or biennials], (5–)10–30+ cm; taprooted (sometimes rhizomatous; stolons produced in some taxa). Stems (excluding stolons) 1–5+, erect (often scapiform), usually branched distally, glabrous. Leaves basal and cauline; petiolate; blades elliptic, oblong, orbiculate, or ovate [lanceolate to oblanceolate or linear], margins entire or denticulate to dentate [pinnately lobed] (faces glabrous [± scabrous]). Heads borne singly or in loose, corymbiform [paniculiform] arrays. Peduncles not inflated distally, usually bracteate. Calyculi of 3–10+, deltate to lanceolate bractlets. Involucres campanulate to cylindric, 2–5[–8+] mm diam. Phyllaries 5–10[–13+] in ± 1 series, linear [lanceolate], equal to subequal, margins sometimes scarious, apices obtuse to acute. Receptacles convex, weakly pitted, glabrous, epaleate. Florets 6–12+; corollas yellow [white or bluish]. Cypselae reddish brown [black], bodies ± fusiform, sometimes ± compressed, ribs (or wings) 10, beaks equal to or shorter than bodies, faces glabrous; pappi persistent, of 20–30, white [brown], ± equal, smooth or barbellulate bristles in 1 series. x = 8.

Species ca. 20 (1 in the flora): introduced; Southeast Asia.

Lower Taxon


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