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湖北老鹳草Geranium rosthornii

时间:2013-09-11 12:03来源:未知 作者:徐晔春 点击:
中文名( Chinese Name ):湖北老鹳草 学名( Scientific Name ): Geranium rosthornii R. Knuth 英文名( English Common Name ): 别名( Chinese Common Name ): 异名( Synonym ): Geranium bockii R. Knuth Geranium henryi R. Knuth Geranium
中文名(Chinese Name):湖北老鹳草
学名(Scientific Name):Geranium rosthornii R. Knuth
英文名(English Common Name):
别名(Chinese Common Name):
异名(Synonym):Geranium bockii R. Knuth  Geranium henryi R. Knuth  Geranium yuexiense Z. M. Tan  Geranium wilsonii R. Knuth  Geranium pseudofarreri Z. M. Tan  Geranium fusiforme Yeo  Geranium hupehanum R. Knuth  Geranium butuoense Z.M. Tan  Geranium duclouxii Yeo  Geranium fargesii Yeo  Geranium henryi var. henryi R. Knuth  Geranium henryi var. wilsonii (R. Knuth) Yeo
科属(Family & Genus):牻牛儿苗科(Geraniaceae)老鹳草属
形态特征(Description):多年生草本,高30-60厘米。根茎粗状,具多数纤维状根和纺锤形块根,上部围以残存基生托叶。茎直立或仰卧,具明显棱槽,假二又状分枝,被疏散倒向短柔毛。基生叶早枯,茎生叶对生,具长柄,柄长为叶片的5-6倍,被短柔毛;托叶三角形,长8-12毫米,宽5-6毫米,被星散柔毛;叶片五角状圆形,掌状5深裂近茎部,裂片菱形,基部浅心形,下部全缘,上部羽状深裂,小裂片条形,先端急尖,下部小裂片常具2-3齿,表面被短伏毛,背面仅沿脉被短柔毛。花序腋生和顶生,明显长于叶,被短柔毛,总花梗具2花;苞片狭披针形,长约5-6毫米,宽约1毫米;花梗与总花梗相似,不等长,长者长为花的1.5-2倍,萼片卵形或椭圆状卵形,长6-7毫米,宽3-4毫米,外被短柔毛,先端具1-2毫米长的尖头;花瓣倒卵形,紫红色,长为萼片的1.5-2倍,先端圆形,基部楔形,下部边缘具长糙毛;雄蕊稍长于萼片,花丝和花药棕色;雌蕊密被短柔毛,花柱分枝长2-3毫米,深紫色。蒴果长约2厘米,被短柔毛。花期6-7月,果期8-9月。
分布(Distribution):分布于山东、河南、安徽、湖北、陕西、甘肃和四川。生于海拔1600-2400米的山地林下和山坡草丛。
用途(Use):
引自中国植物志英文版FOC Vol. 11 Page 9, 26, 27
Geranium rosthornii R. Knuth in Engler, Pflanzenr. 53(IV. 129): 180. 1912.
湖北老鹳草 hu bei lao guan cao | Geraniaceae  | Geranium
Geranium bockii R. Knuth; G. butuoense Z. M. Tan; G. duclouxii Yeo; G. fargesii Yeo; G. henryi R. Knuth; G. hupehanum R. Knuth; ?G. pseudofarreri Z. M. Tan; G. wilsonii R. Knuth; G. yuexiense Z. M. Tan.
Perennials. Rootstock ± horizontal, 5.2-14 mm in diam., not tuberculate, with thickened and napiform roots along rootstock. Stem 21-80 cm tall, erect, not rooting at nodes, with 0.1-0.5 mm patent to retrorse nonglandular trichomes. Stipules broadly lanceolate, distinct or connate at least at base. Leaves opposite; petiole with 0.3-1.4 mm patent to retrorse nonglandular trichomes; leaf blade 2.5-9.6 cm, palmately cleft, ratio of main sinus/middle segment length = 0.71-0.85, pilose with appressed nonglandular trichomes; segments 5, rhombic, 0.3-1.7 cm wide at base, 7-13-lobed in distal half, ratio of second sinus/middle segment length = 0.16-0.42. Cymules solitary, 2-flowered; peduncle 1.6-15.8 cm. Pedicel 0.7-4.4 cm, with 0.1-1.1 mm patent to retrorse nonglandular trichomes; bracteoles lanceolate. Sepals 6.3-7.9(-8.4) mm, mucro 0.7-3.2 mm, ratio of mucro/sepal length = 0.11-0.49, outside with 0.2-1.7 mm antrorse to patent nonglandular trichomes, inside glabrous. Petals pink to purplish, (1-)1.2-1.4 cm, erect to patent, outside basally with trichomes, inside basal 1/3-1/2 with trichomes, margin basally ciliate, apex rounded. Staminal filaments purplish, lanceolate, base slightly dilated, abaxially densely covered with 0.4-2 mm trichomes but glabrous toward tip; anthers purplish, 1.6-2.4 mm. Nectaries 5, hemispheric, abaxially glabrous, apex with a tuft of trichomes. Stigma reddish. Fruit 1.9-2.4 cm, erect when immature; mericarps smooth, with a basal callus, with 0.2-1 mm ± patent nonglandular trichomes; rostrum 1.1-1.5 cm, with a 2-3.2 mm narrowed apex; stigmatic remains 2.3-5 mm. Seeds 1.8-2.8 mm. Fl. Jun-Jul, fr. Aug-Sep.
● Forests, meadows; 800-3900 m. S Anhui (Dabie Shan, Huang Shan), S Gansu (Wenxian), Guizhou, W Henan, W Hubei, S Shaanxi, S Shandong, Sichuan, Yunnan.
This species resembles some specimens of Geranium dahuricum, although it can be distinguished by its rootstock with thickened and usually short napiform roots along the rootstock (not long and fasciculate), its leaves with a broad middle segment, its longer stipules, and its denser indumentum on petals and staminal filaments. The type of G. bockii has leaf blades with segments more rhombic than those of G. rosthornii; otherwise they are undistinguishable. It is mentioned in the original protologue that G. pseudofarreri may have glandular trichomes, which has not been observed in any specimen of G. rosthornii. Unfortunately, the original material of the former is not available, and consequently its synonymization remains provisional.


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