Pseudogynoxys

Vines (herbaceous or suffrutescent), 50–500+ cm. Stems usually 1, ± twining and climbing. Leaves cauline; alternate; petiolate; blades palmati-pinnately nerved, ovate to lanceolate, margins dentate to denticulate, faces ± villous. Heads radiate [discoid], in ± corymbiform arrays or borne singly. Calyculi of 10–20 bractlets. Involucres hemispheric or campanulate to turbinate or cylindric, [4–]12–20(–25+) mm diam. Phyllaries persistent, [8–]12–26+ in (1–)2 series, erect, distinct, lance-linear to linear, equal or subequal, margins membranous (apices sometimes black). Receptacles flat, foveolate, epaleate. Ray florets 6–15+, pistillate, fertile; corollas orange to ± brick-red. Disc florets [12–]40–80+, bisexual, fertile; corollas orange, tubes longer than campanulate throats, lobes 5, erect to reflexed, lance-ovate to lance-linear; style branches stigmatic in 2 lines, apices with lance-attenuate appendages. Cypselae ± cylindric, weakly ribbed, puberulent; pappi persistent, of 100–120+, white, barbellulate bristles.

Distribution

Introduced; Mexico, West Indies, Central America, tropical South America.

Discussion

Species ca. 12 (1 in the flora).

Selected References

Robinson, H. and J. Cuatrecasas. 1977. Notes on the genus and species limits of Pseudogynoxys (Greenm.) Cabrera (Senecioneae, Asteraceae). Phytologia 36: 177–192.

Lower Taxa

Pseudogynoxys chenopodioides