Entry for Cosmos caudatus Kunth [family COMPOSITAE]
Herbarium
Flora of North America (FNA)
Collection
Flora of North America
Resource Type
Reference Sources
Entry From
Flora of North America, Vol 21,
Names
Cosmos caudatusKunth [family COMPOSITAE], in A. von Humboldt et al., Nov. Gen. Sp., 4(fol.): 188. 1818 4(qto.): 240. 1820
Treatment Author(s)
Robert W. Kiger
Information
Plants 30–250 cm, glabrous or sparsely hispid. Leaves: petioles 1–7 cm; blades 10–20 cm, ultimate lobes 2–10 mm wide, margins spinulose-ciliate, apices acute, often mucronulate. Peduncles 10–30 cm. Calyculi of usually spreading, linear-subulate bractlets 6–10 mm, apices acuminate. Involucres 5–15 mm diam. Phyllaries erect, oblong-lanceolate, 7–11 mm, apices acute to obtuse. Ray corollas rose-pink to purple, laminae oblong-oblanceolate, 5–15 mm, apices obtusely 3-lobed. Disc corollas 5–6 mm. Cypselae 12–35 mm, glabrous or scabridulous proximally, setose distally; pappi of 2–3 widely divergent to reflexed awns 3–5 mm. 2n = 48.
Phenology
jun-aug (summer), sep-nov (fall)
Altitude range
0–10 m;
Distribution
MexicoWest IndiesCentral AmericaSouth Americaalso introduced in AsiaPacific Islands.USA Fla.
Discussion
Within the flora area, Cosmos caudatus is found only in the Florida Keys.
