Chromolaena DC.

George R. Proctor (2012). Flora of the Cayman Isands (Second Edition). Royal Botanic Gardens, Kew

Morphology General Habit

Erect or sprawling perennial herbs or shrubs, the stems often pubescent

Morphology Leaves

Leaves simple, usually opposite, the blades often 3-nerved from the base

Morphology Reproductive morphology Inflorescences

Inflorescence usually corymbose, the heads discoid 10–40-flowered; involucres constricted-cylindrical, the bracts ca. 4–7- seriate, overlapping, 3–5-veined, broadly acute to rounded at apex, deciduous; receptacle elongate, flat or conical on top, glabrous

Morphology Reproductive morphology Flowers

Flowers bisexual, the corollas actinomorphic, tubular, and shortly 5-lobed, the lobes often glandular

Morphology Reproductive morphology Flowers Androecium Stamens Anthers

Anthers usually included, the style- branches elongate, linear and exserted, the upper half of each style-branch with a papillose sterile appendage

Morphology Reproductive morphology Fruits

Achenes narrowly obconical, usually 5-ribbed, sometimes glandular; pappus of numerous bristles about equal in length to the corolla and achene.

Distribution

A genus of 166 species widely distributed in the Western Hemisphere from the U.S.A. to Argentina.