别名：早花莓;

科名：蔷薇科 Rosaceae

属名：悬钩子属 Rubus

《中国植物志》第37卷193页
  165.早花悬钩子（拉汉种子植物名称）
  Rubus preptanthus Focke, Bibl. Bot. 72 (1): 42. 1910.
种中文名：早花悬钩子
种拉丁名：Rubus preptanthus Focke
种别名  ：
国内分布：川,滇
海    拔：1000-2700
命名来源：[Bibliotheca Botanica 17(Heft 72(1)): 42 1910]
中国植物志：37:193
英文植物志：9:274
亚组中文名：总序亚组
亚组拉丁名：Subsect；Sozostyli
组中文名：木莓组
组拉丁名：Sect．Malachobatus Fockc in
属中文名：悬钩子属
属拉丁名：Rubus
亚科中文名：蔷薇亚科
亚科拉丁名：ROSOideae Pocke
科中文名：蔷薇科
科拉丁名：Rosaceae
纲中文名：双子叶植物纲
纲拉丁名：DICOTYLEDONEAE
门中文名：被子植物门
门拉丁名：ANGIOSPERMAE
参考文献：Rubus preptanthus Focke，Bibl.Bot.72(1)：42．1910.
亚组概述：Subsect；Sozostyli；(Focke)yu et lu，植物分类学报20(4)：461．1982．-Sect．Sozostyli Focke，Bibl．Bot。—72(1):42.1910 et 83:22. 1914. 本亚组有下列17种。

《Flora of China》 Vol. 9 (2003)
Rubus preptanthus  Focke
早花悬钩子   zao hua xuan gou zi
Shrubs scandent. Branchlets brownish to grayish brown, gray tomentose when young, gradually glabrescent, with sparse, curved minute prickles or nearly unarmed. Leaves simple; petiole (0.3–)1–2 cm, tomentose, usually unarmed; stipules caducous, lanceolate or linear-lanceolate, 0.8–1.4 cm × 2.5–5 mm, membranous, appressed villous; blade oblong-ovate or broadly ovate-lanceolate to narrowly lanceolate, 6–12 × (1–)3–5.5 cm, lateral veins 6–9 pairs, prominent abaxially, papery, abaxially densely gray to yellowish gray appressed tomentose, adaxially glabrous, base rounded to subtruncate, margin unevenly incised coarsely sharply serrate or sparsely so, rarely doubly serrate, apex acuminate. Inflorescences terminal, racemes, 4–8 cm, several to more than 10-flowered; rachis and pedicels densely gray to yellowish gray tomentose-villous; bracts caducous, lanceolate to linear-lanceolate, 0.8–1.2 cm × 2–4 mm, membranous, villous. Pedicel 7–10 mm. Calyx abaxially densely gray to yellowish gray tomentose-villous; tube pelviform; sepals triangular-ovate to lanceolate, 8–10 × 3–5 mm, margin entire, apex acuminate. Petals white, obovate, 5–7 × 4–6 mm, both surfaces puberulous. Stamens many, shorter than sepals, glabrous or hairy when young, or only anthers slightly villous; filaments inflated at base. Pistils slightly longer than or nearly as long as stamens; ovary glabrous; style glabrous. Aggregate fruit purplish black at maturity, semiglobose, 8–10 mm in diam., glabrous; pyrenes slightly rugose. Fl. May–Jun, fr. Jul–Aug.
Forests, bamboo forest margins, thickets, gravelly slopes; 1000--3100 m. Sichuan, Yunnan.