Green Amaranth is an annual herb with stems erect or occasionally
ascending, 10-80 cm long. Stems are sparingly to densely branched,
channeled. Leaves are triangular-ovate to narrowly rhombic, 2-7 cm long,
1.5-5.5 cm wide, hairless, tip usually narrow and with a small narrow
notch, stalks 1-10 cm long. Flowers are green, in slender, paniculate
spikes, in leaf axils or at the end of branches. Both sexes are mixed
throughout the spikes, but female flowers are more numerous, bracts and
bracteoles whitish, triangular-ovate to broadly lanceshaped, membranous,
with a short, pale or reddish awn; sepals are 3, those of staminate
flowers ovate-oblong, 1.5 mm long, tip pointed, mucronate, those of
pistillate flowers narrowly spoon-shaped to oblong, 1.3-1.8 mm long, tip
more or less mucronate; stigmas 2-3. Fruit is nearly round, 1.3-1.5 mm,
not or only slightly exceeding the sepals. Green Amaranth is native to
South America, widely naturalized in the Tropical World.