23. Geranium yunnanense Franchet, Pl. Delavay. 114. 1889.
云南老鹳草 yun nan lao guan cao
Geranium candicans R. Knuth.
Perennials. Rootstock ± vertical, 0.8-1.3 cm in diam., not tuberculate, with thickened roots along rootstock. Stem 28-54 cm tall, erect, not rooting at nodes, with 0.3-0.6 mm retrorse ± appressed nonglandular trichomes. Stipules broadly lanceolate, connate at least at base. Leaves opposite; petiole with 0.3-0.7 mm retrorse ± appressed nonglandular trichomes; leaf blade 2.6-6 cm, palmately cleft, ratio of main sinus/middle segment length = 0.71-0.86, pilose with appressed nonglandular trichomes; segments 5, rhombic, 3.9-10.7 mm wide at base, 5-16-lobed in distal half, ratio of second sinus/middle segment length = 0.19-0.31. Cymules solitary, 2-flowered; peduncle 3.7-7.9(-12.8) cm. Pedicel 1.1-3.6 cm, with 0.3-0.7 mm retrorse ± appressed nonglandular trichomes; bracteoles lanceolate. Sepals 6.6-13.2 mm, mucro 1-1.9 mm, ratio of mucro/sepal length = 0.09-0.25, outside with 0.6-1.3 mm antrorse ± appressed nonglandular trichomes and rarely 0.9-1 mm patent glandular trichomes, inside glabrous. Petals pink to purple, (1.3-)1.6-1.9(-2.1) cm, erect to patent, basally with a dense tuft of trichomes on both surfaces and margin, apex rounded. Staminal filaments purplish or white, lanceolate, abaxially densely pilose and proximal half ciliate, trichomes 1.2-2 mm; anthers blackish, 1.9-2.7 mm. Nectaries 5, hemispheric, abaxially glabrous, apex with a tuft of trichomes. Stigma purplish. Fruit 2.2-3.3 cm, nodding when immature; mericarps smooth, with a basal callus, with 0.4-1 mm ± patent nonglandular trichomes; rostrum 1.4-2.4 cm, with a 2.3-7.7 mm narrowed apex; stigmatic remains 2.4-4.2 mm. Seeds 2.4-3 mm. Fl. Jun-Aug, fr. Aug-Sep.
● Forests, scrub, mid-elevation to alpine meadows; 3200-4300 m. SW Sichuan, NW Yunnan.
Geranium yunnanense shares blackish anthers and fruit nodding when immature with G. refractum, G. sinense, G. delavayi, and G. pogonanthum. However, it has longer and not reflexed petals with abundant trichomes. Other important characters of this species are its broad bracteoles and its staminal filaments with long abundant trichomes.