别名：瘦藨;

科名：蔷薇科 Rosaceae

属名：悬钩子属 Rubus

《中国植物志》第37卷090页
  50.细瘦悬钩子（拉汉种子植物名称）
  Rubus macilentus Camb. in Jacq. Voy. Bot. 4:49. t. 60. 1844; Hook. f. Fl. Brit. Ind. 2:336. 1878; Focke, Bibl. Bot. 72(2): 166. 1911; id. in Sarg. Pl. Wils. 1: 53. 1911; Hara et Ohashi in Fl. E. Himal. 2:57. 1971. ——R. trichopetalus Hand.-Mazz in Sitzber Math.-Nat. Cl. Acad. Wiss. Wien. 57:267. 1920. ——R. minensis Pax. et Hoffm. in. Fedde, Repert. Sp. Nov. 12:406. 1922. e. typo——R. uncatus Wall nom. nud.
形态特征：灌木，高1一2米；小枝圆柱形，具长柔毛和扁平皮刺.小叶 3枚，稀单叶，披剖形、卵状 披针形或卵形，顶生小叶比侧生者长得多；长3-5厘米,宽 1-2．5，厘米；侧生小叶长1— 2厘米，宽0.7 --1.4 厘米；顶端急尖：稀圆钝 ,顶生叶顶端常短渐尖；；基部圆形或宽，楔形， 两面无毛或仅沿叶脉稍有柔毛，下面沿叶脉疏生小皮刺，’边缘具不整齐锐锯齿；叶柄长 0．8—1(1．5)厘米，顶生小叶柄长0．5—1厘米，侧生小叶近无柄；均具柔毛和小皮刺；托叶 线形或线状披针形，具柔毛。：花常；1-3朵；着生于侧生小枝 顶端 ；花梗长0.6-1厘米，具长柔毛，有时疏生小皮刺；苞片披针形或线状披针形，具柔毛；花直径约1厘米;花萼外面被柔毛；萼片披针形或三角披针形，顶端短尾尖，在花果时均直立，稀开展；花瓣宽卵形至长圆形，；两面具柔毛，白色，基部具爪，稍长或几与萼片等长；雄蕊花丝宽扁；花柱基部与房上部稍具长柔毛。果实近球形，无毛或稍有柔毛，桔黄色或红色，包藏于萼内；核球形，有深刻网纹。 花期4—5月，果期7一8月。
产地分布：产四川、云南、西藏。生山坡、路旁、水沟边或林缘， 海拔900—3000米 。不丹、 锡金、尼泊尔、印度北部、克什米尔地区也有分布。
本种提示：此种和直立悬钩子R．Stalls Focke相近似，区别在于后者小枝，花梗和花萼具柔毛和腺毛；小叶片宽卵形或长卵形，稀近圆形，顶生小叶比侧生小叶稍长，’两面具柔毛并有腺毛；花白色或带紫红色。
亚组概述：Subsect．Pungentes；(Fo．cke)：yu et lu 植物分类学报20 (3)： 300．1982．——Sect．Pungentes Focke， Bibl．Bot．72(2)：160．1911 et 83：40. 1914. P． P·——Sect． Idaeanthi Focke，1．C．72(2)：17 .1911：et．，83：43：1914 ．P.p—— Subgen．Cylactis Focke，1．C．72(1)：23.1910 -et 83：16·，1914 .p.p 本亚组有下列14种。

《Flora of China》 Vol. 9 (2003)
Rubus macilentus  Cambessèdes
细瘦悬钩子   xi shou xuan gou zi
Shrubs 1–2 m tall. Branchlets brown or reddish brown, terete, villous, with unequal long complanate prickles. Leaves imparipinnate, 3-foliolate, rarely simple; petiole 0.8–1(–1.5) cm, petiolule of terminal leaflet 0.5–1 cm, lateral leaflets subsessile, pubescent, with minute prickles; stipules linear or linear-lanceolate, 4–6 mm, soft hairy; blade of leaflets lanceolate, ovate-lanceolate, or ovate, terminal leaflet much longer than lateral leaflets, 3–5 × 1–2.5 cm, lateral leaflets 1–2 × 0.7–1.4 cm, both surfaces glabrous or slightly soft hairy, abaxially with sparse, minute prickles only along veins, base rounded or broadly cuneate, margin sharply serrate, apex acute, rarely obtuse, often shortly acuminate on terminal leaflet. Inflorescences terminal on short lateral branchlets, 1–3-flowered; bracts lanceolate or linear-lanceolate, somewhat smaller than stipules, soft hairy. Pedicel 6–10 mm, villous, sometimes with sparse, minute prickles. Flowers ca. 1 cm in diam. Calyx abaxially villous; sepals erect, rarely spreading, lanceolate or triangular-lanceolate, 6–8 × 2–3(–4) mm, apex shortly caudate. Petals white, broadly ovate to oblong, slightly longer than or nearly as long as sepals, both surfaces soft hairy, base clawed. Stamens many, shorter than sepals; filaments broad, complanate. Pistils many, slightly shorter than stamens; apical part of ovary and base of style sparsely villous. Aggregate fruit orange or red, subglobose, glabrous or somewhat soft hairy, enclosed in calyx; pyrenes globose, deeply reticulate. Fl. Apr–May, fr. Jul–Aug.
Slopes, roadsides, near water courses, forest margins; 900--3300 m. Sichuan, Xizang, Yunnan [Bhutan, N India, Kashmir, Nepal, Sikkim].