All Floras      Advanced Search
FOC Vol. 16 Page 175 Login | eFloras Home | Help
FOC | Family List | FOC Vol. 16 | Apocynaceae | Wrightia

4. Wrightia laevis J. D. Hooker, Fl. Brit. India. 3: 654. 1882.

蓝树 lan shu

Wrightia hainanensis Merrill; W. hainanensis var. variabilis Tsiang; W. tinctoria R. Brown var. laevis (J. D. Hooker) Pichon.

Trees to 40 m tall, glabrous except for flowers. Bark dark gray, branchlets brownish, lenticellate. Petiole 5-7 mm; leaf blade oblong or narrowly elliptic, rarely ovate, 7-18 X 2.5-8 cm, apex acuminate to caudate-acuminate; lateral veins 5-11 pairs. Cymes ca. 6 cm; peduncle ca. 1 cm, puberulent to glabrous. Pedicel 1-1.5 cm. Sepals broadly ovate, ca. 1 mm, pubescent outside, apex rounded or obtuse. Corolla white or yellowish, funnelform, tube 1.5-3 mm; lobes narrowly elliptic, 5.5-13.5 mm, papillate; corona fringed, scales 25-35, linear, puberulent. Anthers as long as corona, puberulent. Ovaries 2, distinct. Follicles cylindric, distinct, 20-35 cm X ca. 7 mm, lenticellate. Seeds sublinear, 1.5-2 cm, coma to 4 cm. Fl. Apr-Aug, fr. Jul-Dec. 2n = 22.

Montane forests, valley thickets; 200-1000 m. Guangdong, Guangxi, Guizhou, Hainan, Yunnan [India, Indonesia, Laos, Malaysia, Myanmar, Philippines, Thailand, Vietnam; N Australia]

The roots and leaves are used to treat injury and cuts, and the fruits are used to cure pulmonary tuberculosis. A blue dye is extracted from the leaves.


Related Objects  
  • Illustration
  • Illustration

    Flora of China @
    Browse by
    Advanced Search

    Flora of China Home




     |  eFlora Home |  People Search  |  Help  |  ActKey  |  Hu Cards  |  Glossary  |