Morphological characteristics
Solanum nigrum is an annual erect herb with a height of 0.25-1 meter. The stems have no ribs or ribs, green or purple, nearly hairless or puberulent.
Leaves ovate, 2.5-10 cm long, 1.5-5.5 cm wide, apex shortly pointed, base cuneate to broadly cuneate and reduced to petiole, entire or irregular undulate ribs on each side, smooth or sparsely femorous on both surfaces Hair, leaf veins 5-6 on each side, petiole length of about 1-2 cm.
Iris, inflorescences exserted, composed of 3-6-(10) flowers, peduncle ca. 1-2.5 cm, pedicel ca. 5 mm, subglabrous or pubescent; involucre small, shallow cup-shaped, About 1.5 to 2 mm in diameter, tooth ovoid, apex rounded, angled at base of two teeth internodes; corolla white, tube hidden in corpus callosum, less than 1 mm long, crown ca. 2.5 mm, 5-parted, The lobes are ovoid, approximately 2 mm long; filaments short, anthers yellow, ca. 1.2 mm, approx. 4 times the length of filaments, introrse inward; ovary ovate, ca. 0.5 mm in diam., style ca. 1.5 mm, Below the middle is white fluff, stigma small, head-shaped.
Berry spherical, about 8 mm in diameter, black when cooked. Seeds mostly, nearly ovoid, ca. 1.5-2 mm in diameter, flattened on both sides.
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