黄棉木Metadina trichotoma (Zoll. et Mor.) Bakh. F.
黄棉木Metadina trichotoma (Zoll. et Mor.) Bakh. F.
1. 黄棉木（中国高等植物图鉴）黄凿（广东）图版70
Metadina trichotoma (Zoll. et Mor.) Bakh. f. in Taxon 19: 472. 1970; Ridsd. in Blumea 24 (2): 350-351. 1978; 徐祥浩等, 华南农学院学报2 (4): 33. 1981.——Nauclea trichotoma Zoll. et Mor. Syst. Verz. 61. 1846. -----Adina polycephala Benth. Fl. Hongk. 146. 1861; Havil. in Journ. Linn. Soc. Bot. 33: 46. 1897; Pitard in Lecomte, Fl. Gen. Indo-Chine 3: 37. 1922; How in Sunyatsenia 6: 245. 1946; 中国高等植物图鉴4: 186, 图5785. 1975.
乔木，高5-10米；幼枝呈略扁的圆柱形，褐色，老枝圆柱形，灰色。顶芽金字塔形至圆锥形。叶对生，长披针形或椭圆状倒披针形，长6-15厘米，宽2-4厘米，顶端尾状渐尖，基部渐尖；上面无毛，下面近无毛，或脉上有绒毛；侧脉8-12对；叶柄长7-10毫米；托叶全缘，三角状至窄三角形，褐色，长5-8毫米，跨褶，早落。头状花序顶生，多数，作伞房花序式排列，总花梗长1.5-3厘米，被短绒毛，中部之下有4枚早落的苞片；花近无梗；小苞片线形至线状棒形；花萼管短，长约0.5-0.7毫米，萼裂片长约1毫米，椭圆状长圆形，宿存；花冠高脚碟状或窄漏斗状，花冠管长3毫米，无毛；雄蕊5枚，着生于花冠管喉部，花丝短，无毛，花药基着，内向，伸出冠喉外；花柱伸出，柱头球形至棒状，子房2室，胎座悬垂于隔膜上部1/3处，每室有胚珠4-12颗。小蒴果内果皮硬，宿存萼裂片留附于蒴果中轴上；种子三角形，略两侧压扁，不具翅。花、果期4-12月。
产于广东、广西、云南、湖南等地；生于海拔300米以上（云南可上升至1400米）的林谷溪畔。国外分布于越南、马来西亚、缅甸和印度。
《Flora of China》 Vol. 19 (2011)
Metadina trichotoma (Zollinger & Moritzi) Bakhuizen f. Taxon. 19: 472. 1970.
黄棉木 huang mian mu
Nauclea trichotoma Zollinger & Moritzi, Syst. Verz. 61. 1846; Adina polycephala Bentham; A. trichotoma (Zollinger & Moritzi) Bentham & J. D. Hooker ex B. D. Jackson; A. zschokkei Elmer; N. polycephala Wallich ex G. Don (1834), not A. Richard ex Candolle (1830).
Trees, apparently evergreen, flowering at 5-10 m tall; branches compressed becoming terete, brown to gray, puberulent to glabrous, usually densely lenticellate with elliptic white raised lenticels. Petiole 3-10 mm, glabrous; leaf blade drying stiffly papery to subleathery, lanceolate, elliptic-lanceolate, or ovate-oblong, 6-20 × 2-7 cm, adaxially glabrous and rather shiny, abaxially glabrous to puberulent or tomentulose at least along veins, base acute to obtuse, apex acute to caudate-acuminate; secondary veins 8-12 pairs, sometimes with small pilosulous domatia in axils; stipules deltoid to narrowly triangular, 5-8 mm, acute to perhaps obtuse. Inflorescence glabrous to densely puberulent or tomentulose; peduncles 1.5-3 cm, usually articulate and with 4 caducous bracts 1-3 mm near middle; flowering heads 6-7 mm in diam. across calyces, ca. 12 mm in diam. across corollas; bracteoles ca. 2 mm. Calyx with ovary portion obconic, 0.5-1 mm, pilosulous to glabrescent, surrounded at base by a ring of pilose trichomes ca. 0.5 mm; limb lobed essentially to base; lobes 1-2 mm, narrowly elliptic-oblong, obtuse. Corolla outside glabrous; tube 3-3.5 mm; lobes triangular-spatulate, ca. 1 mm. Stigmas obconic, ca. 1 mm, exserted for ca. 5 mm. Fruiting head 8-10 mm in diam. Capsules obovoid to obconic, ca. 1.5 mm, pilosulous at least on apical portion. Fl. and fr. Apr-Dec.
Forests at streamsides in valleys; 300-1400 m. Guangdong, Guangxi, Hunan, Yunnan [Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Philippines, Thailand, Vietnam].
别名：黄泽木;黄凿;白斧把;埋扎方;黄绵木;大叶水团花;
科名：茜草科 Rubiaceae
属名：黄棉木属 Metadina
1. 黄棉木（中国高等植物图鉴）黄凿（广东）图版70
Metadina trichotoma (Zoll. et Mor.) Bakh. f. in Taxon 19: 472. 1970; Ridsd. in Blumea 24 (2): 350-351. 1978; 徐祥浩等, 华南农学院学报2 (4): 33. 1981.——Nauclea trichotoma Zoll. et Mor. Syst. Verz. 61. 1846. -----Adina polycephala Benth. Fl. Hongk. 146. 1861; Havil. in Journ. Linn. Soc. Bot. 33: 46. 1897; Pitard in Lecomte, Fl. Gen. Indo-Chine 3: 37. 1922; How in Sunyatsenia 6: 245. 1946; 中国高等植物图鉴4: 186, 图5785. 1975.
乔木，高5-10米；幼枝呈略扁的圆柱形，褐色，老枝圆柱形，灰色。顶芽金字塔形至圆锥形。叶对生，长披针形或椭圆状倒披针形，长6-15厘米，宽2-4厘米，顶端尾状渐尖，基部渐尖；上面无毛，下面近无毛，或脉上有绒毛；侧脉8-12对；叶柄长7-10毫米；托叶全缘，三角状至窄三角形，褐色，长5-8毫米，跨褶，早落。头状花序顶生，多数，作伞房花序式排列，总花梗长1.5-3厘米，被短绒毛，中部之下有4枚早落的苞片；花近无梗；小苞片线形至线状棒形；花萼管短，长约0.5-0.7毫米，萼裂片长约1毫米，椭圆状长圆形，宿存；花冠高脚碟状或窄漏斗状，花冠管长3毫米，无毛；雄蕊5枚，着生于花冠管喉部，花丝短，无毛，花药基着，内向，伸出冠喉外；花柱伸出，柱头球形至棒状，子房2室，胎座悬垂于隔膜上部1/3处，每室有胚珠4-12颗。小蒴果内果皮硬，宿存萼裂片留附于蒴果中轴上；种子三角形，略两侧压扁，不具翅。花、果期4-12月。
产于广东、广西、云南、湖南等地；生于海拔300米以上（云南可上升至1400米）的林谷溪畔。国外分布于越南、马来西亚、缅甸和印度。
《Flora of China》 Vol. 19 (2011)
Metadina trichotoma (Zollinger & Moritzi) Bakhuizen f. Taxon. 19: 472. 1970.
黄棉木 huang mian mu
Nauclea trichotoma Zollinger & Moritzi, Syst. Verz. 61. 1846; Adina polycephala Bentham; A. trichotoma (Zollinger & Moritzi) Bentham & J. D. Hooker ex B. D. Jackson; A. zschokkei Elmer; N. polycephala Wallich ex G. Don (1834), not A. Richard ex Candolle (1830).
Trees, apparently evergreen, flowering at 5-10 m tall; branches compressed becoming terete, brown to gray, puberulent to glabrous, usually densely lenticellate with elliptic white raised lenticels. Petiole 3-10 mm, glabrous; leaf blade drying stiffly papery to subleathery, lanceolate, elliptic-lanceolate, or ovate-oblong, 6-20 × 2-7 cm, adaxially glabrous and rather shiny, abaxially glabrous to puberulent or tomentulose at least along veins, base acute to obtuse, apex acute to caudate-acuminate; secondary veins 8-12 pairs, sometimes with small pilosulous domatia in axils; stipules deltoid to narrowly triangular, 5-8 mm, acute to perhaps obtuse. Inflorescence glabrous to densely puberulent or tomentulose; peduncles 1.5-3 cm, usually articulate and with 4 caducous bracts 1-3 mm near middle; flowering heads 6-7 mm in diam. across calyces, ca. 12 mm in diam. across corollas; bracteoles ca. 2 mm. Calyx with ovary portion obconic, 0.5-1 mm, pilosulous to glabrescent, surrounded at base by a ring of pilose trichomes ca. 0.5 mm; limb lobed essentially to base; lobes 1-2 mm, narrowly elliptic-oblong, obtuse. Corolla outside glabrous; tube 3-3.5 mm; lobes triangular-spatulate, ca. 1 mm. Stigmas obconic, ca. 1 mm, exserted for ca. 5 mm. Fruiting head 8-10 mm in diam. Capsules obovoid to obconic, ca. 1.5 mm, pilosulous at least on apical portion. Fl. and fr. Apr-Dec.
Forests at streamsides in valleys; 300-1400 m. Guangdong, Guangxi, Hunan, Yunnan [Cambodia, India, Indonesia, Laos, Malaysia, Myanmar, Philippines, Thailand, Vietnam].
