3. Asystasia salicifolia Craib, Bull. Misc. Inform. Kew. 1918: 367. 1918.
囊管花 nang guan hua
Herbs to 1 m tall. Stems 4-angled, pilose. Petiole ca. 5 mm, sparsely hirsute; leaf blade lanceolate, (5-)12-18 × (1.2-) 1.8-2.8 cm, glabrous or hirsute along veins, secondary veins 6-9 on each side of midvein, base attenuate and decurrent onto petiole, margin entire, apex acuminate. Racemes terminal or rarely axillary, 5-10 cm; bracts triangular, 2-3 × ca. 1 mm, pilose with gland-tipped trichomes; bracteoles similar to bracts. Pedicel 1-3 mm, pilose. Calyx 5-6 mm, outside pilose with gland-tipped trichomes; lobes lanceolate. Corolla red to purplish red, 3.5-4 cm, outside gland-tipped pilose, inside pubescent in throat; lobes ovate, 5-6 × ca. 5 mm. Stamens included; filaments glabrous, longer pair ca. 1 cm, shorter pair ca. 0.8 cm; anther thecae oblong, ca. 3 mm. Ovary pilose; style ca. 2.8 cm, base pilose; stigma apically 2-cleft. Capsule and seeds not seen. Fl. Aug-Oct, fr. Nov-Jan.
Forests. Yunnan [India, Laos, Myanmar, Thailand].
Specimens identified as "Asystasia henryi" (C. Y. Wu, Index Fl. Yunnan. 2: 1669. 1984), which is not a validly published name, belong here.
Outside of China variation in Asystasia salicifolia also includes corollas pinkish to purplish (or rarely entirely white) and leaf blade margins entire to subsinuate.