泰国黄叶树Xanthophyllum siamense Craib
泰国黄叶树Xanthophyllum siamense Craib
3.泰国黄叶树（中国高等植物图鉴）图版30：1-7
Xanthophyllum siamense Craib in Kew Bull. 236. 1922; et Fl. Siam. Enum. 1: 107. 1925; Gagnep. in Lecomte, Fl. Gen. Indo-Chine, suppl. 1: 222. 1939; 中国高等植物图鉴, 补编2: 172, 图8772. 1983; 云南植物志3: 294, 图版84: 9-15. 1983; 云南种子植物名录, 上册215. 1984.
乔木，高5-25（-32）米，胸径15-35厘米；树皮灰色，木栓层厚；小枝细，被黄色短绒毛，具棱。叶片革质，披针形或长圆状披针形，长10-24厘米，宽2.5-6.5厘米，先端渐尖，基部楔形，全缘或呈波状，叶面亮缘黄色，背面淡绿色，两面无毛；主脉在上面明显，背面突起，侧脉每边6-8条，在上面明显，背面突起，直升，于边缘处网结，细脉网状；叶柄长1厘米，深黄褐色，上面具槽。总状或圆锥花序顶生和腋生，常多分枝，长达15厘米，顶生小枝与侧生者常等长，密被黄色短绒毛，总花梗常扁形，长约9厘米，花梗长6毫米；小苞片三角状钻形，长约1毫米，密被黄色短绒毛；花常近对生、假轮生；萼片5，外面2枚卵形或椭圆状卵形，长约2.5毫米，宽1.8-2-25毫米，先端渐尖，两面均被短绒毛，里面3枚倒卵状椭圆形或椭圆形，长3.5毫米，宽2.75毫米，外面贴生短绒毛，里面疏被短柔毛，具缘毛；花瓣5，白色，长6-7毫米，龙骨瓣较短，背面被疏柔毛；雄蕊7，长5-7毫米，花丝基部与花瓣贴生，膨大，被长柔毛，花药箭头状卵形，长0.8毫米，基部略叉开；子房上位，近球形，径1.5毫米，具柄，柄长约1毫米，肥厚，光滑；花柱长6毫米，被长柔毛，柱头微裂；具环状花盘，径约1.5-2毫米。核果球形，幼果绿色，无毛，径约1.8厘米。种子不详。花期3-4月，果期5-6月。
产云南南部；常见于海拔500-2 000米的潮湿密林中，泰国、老挝、柬埔寨也有分布。
《Flora of China》 Vol. 11 (2008)
Xanthophyllum flavescens Roxburgh
泰国黄叶树 tai guo huang ye shu
Xanthophyllum siamense Craib.
Trees 5-25(-32) m tall; trunk 15-35 cm d.b.h.; bark gray, cork thick. Branchlets slender, yellow tomentose, angular. Petiole deep yellow-brown, ca. 1 cm, adaxially sulcate; leaf blade greenish, shiny, lanceolate or oblong-lanceolate, 10-24 × 2.5-6.5 cm, leathery, both surfaces glabrous, midvein raised abaxially, evident adaxially, lateral veins 6-8 pairs, raised abaxially, distinct adaxially, anastomosing near margin, veinlets reticulate, base cuneate, margin sometimes undulate, apex acuminate (tip to 1.5 cm). Racemes or panicles terminal or axillary, usually much branched, to 15 cm; terminal branchlets equaling lateral ones, densely yellow tomentose; peduncles usually compressed, ca. 9 mm; pedicels ca. 6 mm; bracteoles triangular-subulate, ca. 1 mm, densely yellow tomentose. Flowers usually subopposite and pseudowhorled. Sepals: outer 2 ovate or elliptic-ovate, ca. 2.5 × 1.8-2.3 mm, both surfaces tomentose, apex acuminate; inner 3 obovate-elliptic or elliptic, ca. 3.5 × 2.3 mm, both surfaces pubescent, ciliate. Petals white, 6-7 mm, keel abaxially pilose. Stamens 8, 5-7 mm; filaments shortly adherent at base of petals, inflated, villous; anthers sagittate-ovoid, ca. 0.8 mm, slightly furcate at base. Disk annular, 1.5-2 mm in diam. Ovary subglobose, ca. 1.5 mm in diam., with stalk ca. 1 mm, plump, smooth; style ca. 6 mm, villous; stigma slightly lobed. Drupe green when young, ca. 1.8 cm in diam., glabrous; fruit stalk 0.5-1 mm. Seed not seen. Fl. Mar-Apr, fr. May-Jul.
Damp dense forests; 500-2000 m. S Yunnan [Cambodia, Laos, Myanmar, Thailand].
科名：远志科 Polygalaceae
属名：黄叶树属 Xanthophyllum
3.泰国黄叶树（中国高等植物图鉴）图版30：1-7
Xanthophyllum siamense Craib in Kew Bull. 236. 1922; et Fl. Siam. Enum. 1: 107. 1925; Gagnep. in Lecomte, Fl. Gen. Indo-Chine, suppl. 1: 222. 1939; 中国高等植物图鉴, 补编2: 172, 图8772. 1983; 云南植物志3: 294, 图版84: 9-15. 1983; 云南种子植物名录, 上册215. 1984.
乔木，高5-25（-32）米，胸径15-35厘米；树皮灰色，木栓层厚；小枝细，被黄色短绒毛，具棱。叶片革质，披针形或长圆状披针形，长10-24厘米，宽2.5-6.5厘米，先端渐尖，基部楔形，全缘或呈波状，叶面亮缘黄色，背面淡绿色，两面无毛；主脉在上面明显，背面突起，侧脉每边6-8条，在上面明显，背面突起，直升，于边缘处网结，细脉网状；叶柄长1厘米，深黄褐色，上面具槽。总状或圆锥花序顶生和腋生，常多分枝，长达15厘米，顶生小枝与侧生者常等长，密被黄色短绒毛，总花梗常扁形，长约9厘米，花梗长6毫米；小苞片三角状钻形，长约1毫米，密被黄色短绒毛；花常近对生、假轮生；萼片5，外面2枚卵形或椭圆状卵形，长约2.5毫米，宽1.8-2-25毫米，先端渐尖，两面均被短绒毛，里面3枚倒卵状椭圆形或椭圆形，长3.5毫米，宽2.75毫米，外面贴生短绒毛，里面疏被短柔毛，具缘毛；花瓣5，白色，长6-7毫米，龙骨瓣较短，背面被疏柔毛；雄蕊7，长5-7毫米，花丝基部与花瓣贴生，膨大，被长柔毛，花药箭头状卵形，长0.8毫米，基部略叉开；子房上位，近球形，径1.5毫米，具柄，柄长约1毫米，肥厚，光滑；花柱长6毫米，被长柔毛，柱头微裂；具环状花盘，径约1.5-2毫米。核果球形，幼果绿色，无毛，径约1.8厘米。种子不详。花期3-4月，果期5-6月。
产云南南部；常见于海拔500-2 000米的潮湿密林中，泰国、老挝、柬埔寨也有分布。
《Flora of China》 Vol. 11 (2008)
Xanthophyllum flavescens Roxburgh
泰国黄叶树 tai guo huang ye shu
Xanthophyllum siamense Craib.
Trees 5-25(-32) m tall; trunk 15-35 cm d.b.h.; bark gray, cork thick. Branchlets slender, yellow tomentose, angular. Petiole deep yellow-brown, ca. 1 cm, adaxially sulcate; leaf blade greenish, shiny, lanceolate or oblong-lanceolate, 10-24 × 2.5-6.5 cm, leathery, both surfaces glabrous, midvein raised abaxially, evident adaxially, lateral veins 6-8 pairs, raised abaxially, distinct adaxially, anastomosing near margin, veinlets reticulate, base cuneate, margin sometimes undulate, apex acuminate (tip to 1.5 cm). Racemes or panicles terminal or axillary, usually much branched, to 15 cm; terminal branchlets equaling lateral ones, densely yellow tomentose; peduncles usually compressed, ca. 9 mm; pedicels ca. 6 mm; bracteoles triangular-subulate, ca. 1 mm, densely yellow tomentose. Flowers usually subopposite and pseudowhorled. Sepals: outer 2 ovate or elliptic-ovate, ca. 2.5 × 1.8-2.3 mm, both surfaces tomentose, apex acuminate; inner 3 obovate-elliptic or elliptic, ca. 3.5 × 2.3 mm, both surfaces pubescent, ciliate. Petals white, 6-7 mm, keel abaxially pilose. Stamens 8, 5-7 mm; filaments shortly adherent at base of petals, inflated, villous; anthers sagittate-ovoid, ca. 0.8 mm, slightly furcate at base. Disk annular, 1.5-2 mm in diam. Ovary subglobose, ca. 1.5 mm in diam., with stalk ca. 1 mm, plump, smooth; style ca. 6 mm, villous; stigma slightly lobed. Drupe green when young, ca. 1.8 cm in diam., glabrous; fruit stalk 0.5-1 mm. Seed not seen. Fl. Mar-Apr, fr. May-Jul.
Damp dense forests; 500-2000 m. S Yunnan [Cambodia, Laos, Myanmar, Thailand].