吉隆老鹳草 ji long lao guan cao

Geranium chumbiense R. Knuth; G. grevilleanum Wallich.

Perennials. Rootstock ± vertical, short, thick, subwoody, not tuberculate, with long thin fusiform roots. Stem 50-60 cm tall, trailing or ascending, rooting at nodes, with 0.2-0.7 mm patent to retrorse nonglandular trichomes. Stipules broadly lanceolate, distinct. Leaves opposite; petiole with 0.4-0.6 mm patent to retrorse nonglandular trichomes; leaf blade ca. 7.5 cm, palmately cleft, ratio of main sinus/middle segment length = ca. 0.76, pilose with appressed nonglandular trichomes; segments 5, rhombic, ca. 1.2 cm wide at base, 9- or 10-lobed in distal half, ratio of second sinus/middle segment length = ca. 0.21. Cymules solitary, 2-flowered; peduncle 5-18.5 cm. Pedicel 1.5-4.4 cm, with 0.2-0.7 mm patent to retrorse nonglandular trichomes; bracteoles broadly lanceolate. Sepals 0.9-1.4 cm, mucro 1.8-2 mm, ratio of mucro/sepal length = ca. 0.13, outside with 0.2-0.9 mm antrorse to patent nonglandular trichomes and 1-1.2 mm ± patent glandular trichomes, inside glabrous. Petals pale pink or white, 2-2.4 cm, erect to patent, inside basally with trichomes, margin basally ciliate, apex rounded. Staminal filaments blackish except base, lanceolate, abaxially densely covered with 1.5-2 mm trichomes but glabrous toward tip; anthers black. Nectaries 5, hemispheric, abaxially glabrous, apex with a tuft of trichomes. Stigma blackish. Fruit ca. 4 cm, erect when immature; mericarps smooth, with a basal callus; rostrum 2.6-3 cm, with a ca. 4 mm narrowed apex; stigmatic remains 5-6 mm. Seeds unknown. Fl. and fr. Jul-Sep. 2n = 30.

Scrub; 2300-4200 m. S Xizang (Gyirong, Yadong) [Bhutan, N India, Kashmir, Nepal, Pakistan].

This species shares with Geranium wallichianum blackish filaments and stigma and distinctively broad bracteoles. However, G. lambertii has more narrow stipules and staminal filaments with longer trichomes. Geranium kishtvariense R. Knuth is a close species from NW India with shorter stigmatic remains and staminal trichomes. Available material of G. lambertii from China is scarce, and some details of fruit and indumentum description are incompletely known for Chinese plants.