海南马蓝 hai nan ma lan

Championella maclurei (Merrill) C. Y. Wu & H. S. Lo; Strobilanthes maclurei Merrill.

Herbs 50-100 cm tall, isophyllous. Stems reddish, stout, erect or procumbent and rooting at nodes, hirsute when young, glabrescent. Petiole 1-2 cm; leaf blade oblong-ovate, 3-13 × 1.5-5.5 cm, both surfaces golden to brown hirsute, adaxially densely covered with cystoliths, secondary veins ca. 5 on each side of midvein, base cuneate to subrounded, margin crenulate, apex acuminate to shortly acuminate. Inflorescences axillary or terminal, headlike spikes, 1-3 cm, very compact, elongated after flowering; bracts obovate, ca. 1 cm, brown hirsute, pinnately veined, apex reflexed; bracteoles spatulate-linear, ca. 10 × 1 mm, abaxially hirsute on apical half, adaxially subglabrous, margin ciliate. Calyx 6-8 mm, hirsute, 5-lobed almost to base; lobes linear, ca. 1 mm wide, outside hirsute on apical half, margin ciliate. Corolla light blue or white, ca. 3 cm, outside pubescent on tube, inside glabrous except for trichomes retaining style; tube basally cylindric and ca. 0.2 mm wide for ca. 1.2 cm then gradually widened to ca. 1 cm at mouth; lobes oblong, ca. 6 mm. Stamens 4, included; filaments pilose, shorter pair ca. 3 mm, longer pair ca. 6 mm; anther thecae oblong, ca. 2 × 1 mm; pollen type 2. Ovary pubescent at tip; style ca. 2.5 cm, hirsute. Capsule light brown, ca. 7 mm, pubescent at tip, 4-seeded. Seeds ovate in outline, ca. 2.5 × 2 mm, pubescent. Fl. Sep-Jan, fr. Dec-Mar.

Forests, on rocks by streams; 400-1800 m. Guangxi, Hainan, Yunnan [Vietnam].