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

2. Cosmianthemum knoxiifolium (C. B. Clarke) B. Hansen, Nordic J. Bot. 5: 195. 1985.

秋英爵床 qiu ying jue chuang

Gymnostachyum knoxiifolium C. B. Clarke, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 74: 663. 1908; Pseuderanthemum parviflorum Ridley; Ptyssiglottis parviflora (Ridley) Ridley; Sphinctacanthus malayanus Ridley.

Shrubs to 50 cm tall or more. Stems terete, puberulent. Petiole 1-1.5 cm, glabrous; leaf blade elliptic-lanceolate, 8-20 × 1.8-7.3 cm, leathery, abaxially puberulent along veins and margin, adaxially glabrous, secondary veins 8-10 on each side of midvein, base cuneate, margin remotely serrate or subentire, apex acuminate to attenuate. Thyrses terminal, (5.5-)10-30(-60) cm; rachis brownish pubescent with few gland-tipped trichomes; bracts lanceolate, 2-3 × 0.5-1 mm, gland-tipped pubescent; bracteoles subulate, 1-2 × ca. 0.5 mm. Pedicels 1-3 mm, pubescent. Calyx 2.5-5 mm, outside gland-tipped pubescent; lobes lanceolate, outside scaly hairy. Corolla white to pale yellow with purple spots on lower lip, ca. 1.5 cm, outside pubescent; tube ca. 5 mm; upper lip erect, apically 2-lobed to emarginate. Staminal filaments 6-7 mm, glabrous; staminodes ca. 1 mm, pubescent. Ovary gland-tipped pubescent; style pubescent. Capsule 2-2.7 cm, puberulent. Seeds ovate in outline, ca. 2 × 2 mm, flattened, irregularly ridged or warty, lacking trichomes. Fl. May-Sep, fr. Sep-Dec.

Dense montane forests; 400-500 m. Hainan [Malaysia, Thailand, Vietnam].


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