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FOC | Family List | FOC Vol. 19 | Acanthaceae | Leptostachya

1. Leptostachya wallichii Nees in Wallich, Pl. Asiat. Rar. 3: 105. 1832.

纤穗爵床 xian sui jue chuang

Codonacanthus spicatus Handel-Mazzetti; Dianthera leptostachya C. B. Clarke; Justicia wallichii (Nees) T. Anderson; Odontonemella leptostachya (C. B. Clarke) Lindau; Ptyssiglottis leptostachya (C. B. Clarke) S. Moore.

Herbs 30-100 cm tall. Stems prostrate at base then ascending. Branches subterete, striate, bifariously pubescent then glabrescent. Petiole 1.5-4 cm, puberulent; leaf blade ovate, lanceolate, or elliptic, 2-11(-17) × 1-5 cm, abaxially subglabrous except sparsely pubescent on margin and veins, adaxially glabrous or with few scattered trichomes, secondary veins 4-7 on each side of midvein, base rounded to broadly cuneate, margin entire, apex acute. Inflorescences with 1-3 spikes, 4-12 cm; rachis gland-tipped pubescent; bracts oblong-lanceolate, oblanceolate, or obovate, 1.2-2.5 mm; bracteoles lanceolate, 1-3 mm, apex acute. Calyx 2.5-3 mm; lobes subulate, outside gland-tipped pubescent. Corolla white, 5-8 mm, outside pilose; tube basal portion narrowly cylindric, 4-5 × ca. 0.5 mm; lobes of lower lip triangular-ovate, subequal. Stamens inserted in corolla throat; filaments 1.5-4 mm, glabrous or puberulent; anther thecae 1-1.5 mm. Ovary glabrous or apically hirsute; style glabrous or hirsute at basal portion; stigma 2-cleft. Capsule 1-1.5 cm, finely pubescent. Seeds ca. 2 × 2 mm, with concentric ridges of short linear warts. Fl. Jun-Sep.

Moist forests; 900-1600 m. Guangdong, Guangxi, Hainan [Bhutan, India, Indonesia, Laos, Malaysia, Myanmar, Thailand, Vietnam].


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