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Leaves often solitary, green or brownish, not glaucous, minutely puberulent to sparsely hairy and often viscid on both sides with long, multicellular hairs; petiole 0.5–4 cm long, not winged; lamina thickened, ± fleshy, 2.5–12.5 × 1–10.5 cm (elsewhere lower ones said to reach 30 cm in length), broadly ovate to elliptic, sometimes elliptic-lanceolate or suborbicular, base attenuate or cuneate to rounded, sometimes subcordate, equal-sided to unequal-sided, apex rounded or obtuse to acute, entire to rarely undulate.
Herbs annual, 40-60(-120) cm tall, with viscid, glandular hairs. Petiole 5-15 cm; leaf blade ovate, oblong, or lanceolate, 10-30 cm, membranous, glandular hairy, base cordate or rounded. Inflorescences many-flowered, compact to lax panicles. Pedicel 3-7 mm. Calyx cup-shaped, 7-12 mm; lobes deltate, unequal. Corolla greenish yellow, tubular; tube 1.2-2 cm; limb ca. 4 mm in diam.; lobes short, obtuse, apiculate. Stamens unequal. Capsules subglobose, 1-1.6 cm. Seeds brown, oblong, ca. 1 mm. Fl. Jul-Aug.
Corolla greenish to yellow, 1.2–2 cm long, salviform or tubular-campanulate; tube narrow to just above the calyx, then broadly dilated and urceolate, 4–6 mm wide distally, slightly villous to puberulent outside; limb 2–4 mm long, 3–7(10) mm across, shortly lobed or subentire at the margin; lobes 0.2–3 × 2–7 mm, triangular, rounded, obtuse-apiculate or sub-acute, erect or spreading.
Flowers often many, erect or drooping, in narrow and compact or broad and loose, glandular-pubescent, paniculiform, terminal inflorescences 3–6 cm long; bracts and bracteoles small, linear to foliaceous, often ephemeral, or absent; pedicels (2)3–5 mm long, slender, later somewhat thickened distally and 5–7 mm long, ± erect, glandular-pubescent.
Calyx 5–13 × 3.5–7 mm, poculiform to tubular, pubescent; lobes subequal or unequal, one much longer than the other 4, 1–5 × 1.5–5 mm, ± broadly triangular or ovate-triangular, acute to obtuse, somewhat ciliate; in fruit somewhat enlarged to 12 × 12 mm and enclosing it or not.
Stamens unequal or subequal, one shorter than the other 4, included; filaments 0.6–1 cm long, attached at or sometimes near the base of the corolla dilation, white-hairy at or near the insertion, sigmoidly erect; anthers 1.5–1.8 × 1 mm.
A herb. It grows each year from seed. It grows 40-60 cm tall. The leaves are oval or oblong and 10-30 cm long. There are many flowers in a group. They are greenish-yellow.
Fruit ± erect, brownish, 7–11 × 7–11 mm, ± globose to ellipsoid-ovoid, without an apical beak, thin-walled, glabrous, splitting above into 2 valves by septicidal slits.
Annual to short-lived perennial herb 0.2–0.9 m tall (elsewhere said to reach 1.5 m), sometimes somewhat bushy below, somewhat viscid-pubescent.
Disk 0.2–0.5 mm high, somewhat thin, coalescent downwards and the rest adnate to the basal part of the ovary, obsoletely lobed.
Seeds dull-brown, 0.7–1 × 0.6–0.9 mm, subglobose, ovoid or ellipsoid, angular, fluted-reticulate.
Ovary 2.5–3 × 1.5–2 mm, conic or ovoid, glabrous; style 0.7–1.2 cm long, straight, glabrous.
Short greenish-yellow flowers villous outside.
Herb, branched up to 4 ft. high
Branches herbaceous, ± terete.
