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宽叶仙女木 Dryas octopetala var. asiatica

时间:2013-11-07 12:54来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ): 宽叶仙女木 学名( Scientific Name ): Dryas octopetala var. asiatica (Nakai) Nakai 英文名( English Common Name ): 别名( Chinese Common Name ): 东亚仙女木 异名( Synonym ): Dryas ajanensis Juz. Dryas tsch
中文名(Chinese Name):宽叶仙女木
学名(Scientific Name):Dryas octopetala var. asiatica (Nakai) Nakai
英文名(English Common Name):
别名(Chinese Common Name):东亚仙女木
异名(Synonym):Dryas ajanensis Juz.  Dryas tschonoskii Juz.  Dryas nervosa Juz.  Dryas octopetala f. asiatica Nakai  Dryas octopetala subsp. nervosa (Juz.) Hultén  Dryas octopetala subsp. tschonoskii (Juz.) Hultén
科属Family & Genus):蔷薇科(Rosaceae)仙女木属
形态特征Description):常绿半灌木,根木质;茎丛生,匍匐,高3-6厘米,基部多分枝。叶亚革质,椭圆形、宽椭圆形或近圆形,长5-20毫米,宽3-12毫米,先端圆钝,基部截形或近心形,边缘外卷,有圆钝锯齿,上面疏生柔毛或无毛,下面有白色绒毛,侧脉7-10对,中脉及侧脉在下面隆4起,有黄褐色分枝长柔毛;叶柄长4-20毫米,有密生白色绒毛及黄褐色分枝长柔毛;托叶膜质,条状披针形,长4-5毫米,大部分贴生于叶柄,先端锐尖,全缘,有长柔毛。花茎长2-3厘米,果期达6-7 厘米,有密生白色绒毛、分枝长柔毛.及多数腺毛;花直径1.5-2厘米,萼筒连萼片长7-9毫米,有疏生白色卷毛及多数深紫色分枝柔毛,并杂有深紫色及淡黄色腺毛;萼片卵状披针形,长5-6毫米,先端近锐尖,外面有深紫色分枝柔毛及疏生白色柔毛,内面先端有长柔毛;花瓣倒卵形,长8-10毫米,白色,先端圆形,无毛;雄蕊多数,花丝长4-5毫米,无毛;花柱有绢毛。瘦果矩圆卵形,长3-4毫米,褐色,有长柔毛,先端具宿存花柱,长1.5-2.5厘米,有羽状绢毛。花果期7-8月。
分布(Distribution):产吉林、新疆,生于海拔2200-2800米高山草原。日本、朝鲜、俄罗斯等地有分布。
用途(Use):
引自中国植物志英文版:FOC Vol. 9 Page 286     
Dryas octopetala Linnaeus var. asiatica (Nakai) Nakai, Fl. Sylv. Kor. 7: 47. 1918.
东亚仙女木 dong ya xian nu mu| Rosaceae  | Dryas
Dryas octopetala f. asiatica Nakai, Bot. Mag. (Tokyo) 30: 233. 1916; D. ajanensis Juzepczuk; D. nervosa Juzepczuk; D. octopetala subsp. nervosa (Juzepczuk) Hultén; D. octopetala subsp. tschonoskii (Juzepczuk) Hultén; D. tschonoskii Juzepczuk.
Shrublets 3–6 cm tall. Roots woody. Stems tufted, prostrate, much branched from base. Stipules mostly adnate to petiole, linear-lanceolate, 4–5 mm, membranous, villous, margin entire, apex acute; petiole 4–20 mm, densely white tomentose and yellow-brown branched villous; leaf blade elliptic, broadly so, or suborbicular, 5–20 × 3–12 mm, subleathery, abaxially white tomentose, yellowish brown branched villous on veins, adaxially pilose or glabrous, veins abaxially elevated, lateral veins in 7–10 pairs, base truncate or subcordate, margin recurved and obtusely serrate, apex rounded. Flowering stems 2–3 cm, elongating to 7 cm in fruit, densely white tomentose, branched villous, and densely glandular hairy. Flowers 1.5–2.5 cm in diam. Hypanthium 7–9 mm, sparsely white floccose, densely dark purple branched villous, and dark purple and light yellow glandular hairy. Sepals ovate-lanceolate, 5–6 mm, abaxially dark purple branched villous and white pilose, adaxially villous near apex, apex subacute. Petals white or creamy white, obovate, 8–14 mm, glabrous, apex rounded. Stamens numerous; filaments 4–5 mm, glabrous. Style sericeous. Achenes brown, long ovoid, 3–4 mm, villous, terminating in a plumose style 1.5–2.5 cm. Fl. and fr. Jul–Aug.
Alpine meadows; 2200--2800 m. S Jilin (Changbai Shan, Fusong Xian), Xinjiang (Tian Shan) [Japan, Korea, E Russia (Kamchatka, Sakhalin)].
Dryas octopetala var. octopetala occurs in mountainous regions of Asia, Europe, and North America.




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