Flora of Barro Colorado Island

Machaerium floribundum

Benth., J. Proc. Linn. Soc., Bot. 4, Suppl. 68.1860

M. woodworthii Standl.

Liana; branches with coarse, short, spinescent stipules; branchlets ± glabrous, bearing thick, spinescent stipules 5-10 mm long; outer bark smooth and flaking. Leaves compound; petiole and rachis usually inconspicuously pubescent; petiolules wrinkled, 2-6 mm long; leaflets 9-11, alternate or opposite on rachis, ovate, oblong, or obovate, obtuse to abruptly acuminate, obtuse to rounded at base, 3-10 cm long, 1.5-4.5 cm wide (juveniles to 19 cm long and 8.5 cm wide), glabrous on upper surface, minutely               appressed-pubescent on lower surface, the major lateral veins 10-14, much more conspicuous than secondary veins and merging imperceptibly with the enlarged, discolored leaflet margin. Panicles axillary, 4-7 cm long, the branches densely golden-puberulent; brac­teoles ca 1.3 mm long; flowers mostly sessile, white with a purple throat; calyx urceolate, 3-4 mm long, the lobes very short, obtuse; standard glabrous, ca 6.5 mm long, abruptly flexed near the middle; keel and wings to ca 5 mm long; stamens monadelphous, the filaments about half the length of the sheath; ovary pubescent, the tri­chomes dense, brown, appressed. Fruits unknown. Croat 10093, 17033, Woodworth & Vestal 422 (type of M. woodworthii Standl.).

Infrequent, in the forest and along the shore. Seasonal behavior uncertain. Flowers at least in February. The fruits probably mature in the same dry season.

Mexico to Venezuela and Peru. In Panama, known only from tropical moist forest on BCI.