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25. Asarum delavayi Franchet, Bull. Mus. Nat. Hist. Nat. (Paris). 1: 66. 1895.
川滇细辛 chuan dian xi xin
Asarum maekawae Hara.
Herbs robust. Rhizomes horizontal, 2-3 mm in diam., internodes less than 1 cm. Leaves solitary; petiole 10-21 cm, glabrous; leaf blade abaxially greenish, rarely reddish purple, glossy, adaxially green, occasionally with white blotches or white reticulate veins, ovate or sagittate, 7-15 × 6-11 cm, adaxial surface sparsely pubescent along veins, base auriculate or auriculate-cordate, lateral lobes 2-6 × 1.5-5 cm, apex long acuminate; cataphylls oblong or ovate, 1-3 × 0.8-1 cm. Peduncle ascending to recurved, 1-3.5 cm. Calyx purple-green, campanulate, 4-5 × 4-6 cm; sepals connate beyond attachment to ovary, abaxially glabrous; tube subcylindric, ca. 2 × 1.5 cm, strongly constricted at throat, adaxially tessellate, orifice ring 2-3 mm wide; lobes broadly ovate, 2-3 × 3-4 cm, base with papillate-rugose area. Stamens 12; filaments much shorter than anthers; connectives slightly extended beyond anthers, awl-shaped. Ovary nearly superior or half-inferior. Styles free, apex 2-forked; stigmas lateral. Fl. Apr-Jun.
* Forests, thickets, moist shady areas, mountain slopes; 800-1600 m. SW Sichuan, NE Yunnan.
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