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Annual herb from 6 cm. to 1 m. tall, erect or with arcuate-ascending branches from near the base; young stems densely pubescent or tomentellous with occasional longer weak or stiffish hairs.
Flowers 3–3·5 cm. in diam., white or pale yellow, solitary, axillary; peduncle up to 4 cm. long, slender, pubescent, articulated c. 2 mm. below the apex.
Calyx 8–13 mm. long, becoming somewhat scarious in fruit, hairy like the young stems; lobes narrowly lanceolate, joined for c. 3 mm. at the base.
Annual herb, 0.6-1.0 m high. Stipules 1-2 mm long. Epicalyx absent. Calyx lobes longer than capsule. Flowers white or pale yellow.
Staminal tube up to 12 mm. long, antheriferous only in the upper half; free parts of filaments 1·5–2 mm. long.
Capsule 5–8 × 5–6 mm., ellipsoid, carpels pointed or with short awns 0·5–1 mm. long.
Seeds 2 × 1·5 mm., irregularly subreniform, densely verruculose otherwise glabrous.
Petals up to 18 × 8 mm., narrowly obovate, glabrous.
An erect, branching, pubescent herb, woody below
Flowers pale yellow less than 1 in. long.
Style-branches c. 0·5 mm. long.
Epicalyx absent.
