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臀果木Pygeum topengii

时间:2013-11-11 12:21来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ): 臀果木 学名( Scientific Name ): Pygeum topengii Merr. 英文名( English Common Name ): 别名( Chinese Common Name ): 臀形果 异名( Synonym ): Pygeum tokangpengii Merr. 科属( Family Genus ): 蔷薇科Rosac
中文名(Chinese Name):臀果木
学名(Scientific Name):Pygeum topengii Merr.
英文名(English Common Name):
别名(Chinese Common Name):臀形果
异名(Synonym):Pygeum tokangpengii Merr.
科属(Family & Genus):蔷薇科Rosaceae臀果木属Pygeum
形态特征(Description):乔木,高可达25米,树皮深灰色至灰褐色;小枝暗褐色,具皮孔,幼时被褐色柔毛,老时无毛。叶片革质,卵状椭圆形或椭圆形,长6-12厘米,宽3-5.5厘米,先端短渐尖而钝,基部宽楔形,两边略不相等,全缘,上面光亮无毛,下面被平铺褐色柔毛,老时仍有少许毛残留,沿中脉及侧脉毛较密,近基部有2枚黑色腺体,侧脉5-8对,在下面突起;叶柄长5-8毫米,被褐色柔毛;托叶小,早落。总状花序有花10余朵,单生或2至数个簇生于叶腋,总花梗、花梗和花萼均密被褐色柔毛;花梗长1-3毫米;苞片小,卵状披针形或披针形,具毛,早落;花直径2-3毫米;萼筒倒圆锥形;花被片10-12,长约1-2毫米,萼片与花瓣各5-6枚;萼片三角状卵形,先端急尖;花瓣长圆形,先端稍钝,被褐色柔毛,稍长于萼片,或与萼片不易区分;子房无毛。果实肾形,长8-10毫米,宽10-16毫米,顶端常无突尖而凹陷,无毛,深褐色;种子外面被细短柔毛。花期6-9月,果期冬季。
分布(Distribution):产福建、广东、广西、云南、贵州。生于山野间,常见于山谷、路边、溪旁或疏密林内及林缘,海拔100-1600米。
用途(Use):种子可供榨油。
引自中国植物志英文版: FOC Vol. 9 Page 431
Pygeum topengii Merrill, Philipp. J. Sci. 15: 237. 1919.
臀果木 tun guo mu | Rosaceae  | Pygeum
Pygeum tokangpengii Merrill.
Trees to 25 m tall. Bark dark gray to grayish brown. Branchlets dark brown, brown pubescent when young, glabrescent, with orbicular small lenticels. Winter buds ovoid, 2.5–5 mm, brown pubescent, apex acute. Petiole 5–8 mm, brown pubescent; leaf blade ovate-elliptic to elliptic, 6–12 × 3–5.5 cm, leathery, abaxially brown appressed pubescent and more densely so along midvein and secondary veins but glabrescent or only very sparsely pubescent and with 2 black nectaries near base, adaxially lustrous and glabrous, base broadly cuneate and asymmetric, margin entire, apex shortly acuminate and with an apical obtuse tip; secondary veins 5–8 on either side of midvein, abaxially raised. Racemes solitary or to several in a fascicle, 4–7 cm, many-flowered; rachises, pedicels, bracts, hypanthia, and sepals densely brown pubescent; bracts small, ovate-lanceolate to lanceolate, soon caducous. Flowers 2–3 mm in diam. Pedicel 1–3 mm. Hypanthium obconic, 2–2.5 mm. Sepals 5 or 6, triangular-ovate, 1–2 mm; apex acute. Petals as many as sepals, oblong, slightly longer than sepals or undistinguishable from sepals, outside brown pubescent, apex ± obtuse. Ovary glabrous. Drupe dark brown, reniform, 0.8–1 × 1–1.6 cm, glabrous, apically depressed. Fl. Jun–Sep, fr. winter.
Forests, forest margins, abandoned fields, mountain valleys, along trails, stream sides; 100--1600 m. Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hunan, Yunnan.
 




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