Description
Key Characters:
Growth Form:
Annual herbs with fibrous roots.
Stems:
Stems translucent pale green, erect or ascending, usually 15–45 cm long, internodes usually 3–8 cm long, glabrous.
Roots:
Leaves:
Leaves simple.
Alternate.
Blades broadly ovate, 1.5–4(–5) cm long, 1–3.3 cm wide.
Apex acuminate.
Base subcordate to truncate.
Surfaces glabrous, medium green on upper surface; lower surfaces whitish green, thinly fleshy, drying papery.
Margins entire.
Palmately 3– or 5-veined.
Petioles 0.5–2(–3) cm long, glabrous.
Stipules absent.
Flowers:
Flowers in spikes 1 to several, terminal and axillary or leaf–opposed, filiform, ca. 3–6 cm long, the rachis ca. 0.4–0.6 mm in diameter, glabrous, flowers well-spaced, peduncles ca. 0.6–1 cm long, glabrous.
Flowers bisexual (perfect), perianth absent. Each flower subtended by a peltate bract.
Calyx (sepals) absent.
Corolla (petals) absent.
Stamens 2.
Ovary superior, ovoid, 1-carpellate, 1-celled, apex ± oblique; ovules 1 per cell, orthotropous, erect; stigmas 1–4, terminal.
Fruit:
Fruit subglobose; ca. 0.5 mm long; longitudinally ridged; apex beaked; papillose–viscid with sessile glands.
Seeds 1 per fruit; with scanty endosperm and copious; starchy perisperm.
Ploidy:
2n = 20–24; 44; 46; 48
Habitat:
Garden weeds.
Elevation Range: