Vasilis Teodoridis:
Apocynaceae | Alstonia
1. Alstonia rostrata C. E. C. Fischer; Bull. Misc. Inform. Kew. 1929: 315. 1929.
??? pen jia shu
Alstonia glaucescens (Wallich ex G. Don) Monachino; Alstonia pachycarpa Merrill & Chun; Alyxia glaucescens Wallich ex G. Don; not Wallich; Winchia calophylla A. de Candolle; not Alstonia calophylla Miquel; W. glaucescens (Wallich ex G. Don) K. Schumann.
Trees evergreen; glabrous; to 30 m tall. Branches greenish; angled when young. Leaves in whorls of 3 or 4; rarely opposite; petiole 1-2 cm; leaf blade narrowly elliptic; 7-20 X 2.5-4.5 cm; thick papery; lustrous adaxially; paler abaxially; apex caudate or acuminate; lateral veins 20-50 pairs; at 80-90° to midvein. Cymes glabrous; ca. 4 cm; peduncle 1.5-3 cm. Pedicel to 3 mm. Corolla white; pubescent; tube 5-6 mm; lobes broadly ovate; 3-4 mm; overlapping to left. Disc absent. Ovaries connate. Follicles connate; 18-35 X 1-1.2 cm. Seeds narrowly elliptic; cilia brown-yellow; to 2 cm. Fl. Apr-Jul; fr. Aug-Dec.
Monsoon or montane rain forests; 300-1100 m. Hainan; S Yunnan [India; Indonesia; Malaysia; Myanmar; Thailand]
The wood is used for making furniture and stationery; and the leaves and bark are used to treat acute bronchitis.
Vasilis Teodoridis:
Apocynaceae | Alstonia
1. Alstonia rostrata C. E. C. Fischer; Bull. Misc. Inform. Kew. 1929: 315. 1929.
??? pen jia shu
Alstonia glaucescens (Wallich ex G. Don) Monachino; Alstonia pachycarpa Merrill & Chun; Alyxia glaucescens Wallich ex G. Don; not Wallich; Winchia calophylla A. de Candolle; not Alstonia calophylla Miquel; W. glaucescens (Wallich ex G. Don) K. Schumann.
Trees evergreen; glabrous; to 30 m tall. Branches greenish; angled when young. Leaves in whorls of 3 or 4; rarely opposite; petiole 1-2 cm; leaf blade narrowly elliptic; 7-20 X 2.5-4.5 cm; thick papery; lustrous adaxially; paler abaxially; apex caudate or acuminate; lateral veins 20-50 pairs; at 80-90° to midvein. Cymes glabrous; ca. 4 cm; peduncle 1.5-3 cm. Pedicel to 3 mm. Corolla white; pubescent; tube 5-6 mm; lobes broadly ovate; 3-4 mm; overlapping to left. Disc absent. Ovaries connate. Follicles connate; 18-35 X 1-1.2 cm. Seeds narrowly elliptic; cilia brown-yellow; to 2 cm. Fl. Apr-Jul; fr. Aug-Dec.
Monsoon or montane rain forests; 300-1100 m. Hainan; S Yunnan [India; Indonesia; Malaysia; Myanmar; Thailand]
The wood is used for making furniture and stationery; and the leaves and bark are used to treat acute bronchitis.