目前为止，中国西南野生生物种质资源库共保藏该物种: 种子3份; DNA材料13份; DNA5份;

• 科:夹竹桃科    Apocynaceae
• 属:鸡骨常山属    Alstonia
• 种:鸡骨常山   Alstonia yunnanensis

4. Alstonia yunnanensis Diels, Notes Roy. Bot. Gard. Edinburgh. 5: 165. 1912. 鸡骨常山 ji gu chang shan Alstonia esquirolii H. Léveillé; Acronychia esquirolii H. Léveillé.Shrubs erect, to 3 m tall. Branches conspicuously lenticellate, puberulent when young. Leaves in whorls of 3-5, petiolate; blade very narrowly obovate or oblong, 6-19 X 1.3-5 cm, thin papery, pubescent on both surfaces, apex acuminate; lateral veins 15-35 pairs, at 45° to midvein. Cymes puberulent; peduncle 0.5-2 cm. Pedicel to 8 mm. Corolla pink to red, tube 1-1.3 cm; lobes oblong, 2-6 mm, overlapping to left. Disc lobes 2, ligulate, as long as or longer than ovaries. Follicles distinct, linear, 3-5 cm X ca. 4 mm. Seeds oblong, ends with very short cilia. Fl. Mar-Jun, fr. Jun-Nov. 2n = 44*.* Montane brush fields, 800-2400 m. Guangxi, Guizhou, YunnanThe roots are used to cure hypertension and the leaves to treat hemostasis and fracture. The seeds yield up to 18% industrial oil.【引自：Flora of China】

直立灌木，高1-3米，多分枝，具乳汁；枝条灰绿色，表面具白色突起的皮孔，嫩枝被柔毛。叶3-5片轮生，薄纸质，倒卵状披针形或长圆状披针形，顶部渐尖，基部窄楔形，全缘，长6-18.5厘米，宽1.3-4.8厘米，叶面深绿色，叶背灰绿色，两面被短柔毛，下面较密；侧脉每边15-32条，脉距2-7毫米，弧曲上升，与中脉成45°角，整齐，在叶缘联结；无叶柄，或叶柄极短；叶腋间及叶腋外密生腺体。花紫红色，芳香，多朵组成顶生或近顶生的聚伞花序，被柔毛；总花梗长约2厘米；花梗长0.5厘米；萼片披针形，长1.5毫米，外面被短柔毛，内面无毛，边缘有缘毛；花冠高脚碟状，花冠筒长1-1.3厘米，中部膨大，外面无毛，内面被柔毛，裂片在花蕾时或裂片基部向左覆盖，长圆形，长2-6毫米，宽1-3毫米，被缘毛；雄蕊着生在花冠筒中部，花药长圆形，内藏，长约2.5毫米；子房高1.5毫米，无毛，花柱长6毫米，柱头棍棒状，基部密被短柔毛，顶端2裂；花盘由2枚舌状鳞片组成，与心皮互生，比子房长或等长。蓇葖2，线形，顶端具尖头，长3-5厘米，直径约4毫米，无毛；种子多颗成镶嵌式排列，两端被短缘毛。花期3-6月，果期7-11月。【引自：中国植物志】