Flora of Barro Colorado Island

Chamaesyce hyssopifolia

(L.) Small, J. New York Bot. Gard. 3:429. 1905

Euphorbia brasiliensis Lam.


Monoecious herb, to 50 (70) cm tall, essentially glabrous all over; stems straw-colored, reddish, or brown. Leaves opposite, simple; stipules minute, interpetiolar; petioles 1-2 mm long; blades variable, obovate to ovate, obtuse at apex, rounded to slightly cordate and oblique at base, 1-3 cm long, 6-10 mm wide, serrate. Flowers naked, the cyathia glabrous, the glomerules loose, short-stalked, terminal or axillary, usually noticeably leafed; disk with glands elliptic or suborbicular, their appendages white or pink; stamen 1; styles 3, bifid. Capsules oblong-ovoid, glabrous, to 1.8 mm long, 1.7-2 mm wide, sometimes broader than long; seeds ovoid, ca 1 mm long, reddish-­brown, angulate. Croat 16526.

Common in the Laboratory Clearing. Flowers and fruits throughout the year.

Standley (1933) erroneously reported this as Euphorbia brasiliensis L.

Throughout tropical America; adventive in the Old World. In Panama, ecologically variable; known from tropical moist forest throughout Panama and from pre­montane dry forest in Los Santos, from tropical dry forest in Coclé and Panama, from premontane moist forest in Panama, from premontane wet forest in Bocas del Toro, Colon, Chiriqui, and Panama, and from trop­ical wet forest in Colon.

See Fig. 320.

Photos from STRI Digital Archive

  • Chamaesyce hyssopifolia