Geranium suzukii Masam.

According to some authors, this species is related to Geranium nepalense and G. sibiricum, from which it differs by the leaf and petal characters mentioned in the key. Geranium suzukii is a trailing herb, constantly rooting at the nodes. It usually has glandular trichomes restricted to the sepals and sometimes to the fruit. The petals are white or pale pink, not yellow as some authors have mentioned. This was stated in the protologue and has been observed in cultivated specimens.

Perennials. Rootstock ± horizontal, 2-3 mm in diam., not tuberculate, without thickened roots. Stem 18-45 cm tall, trailing, rooting at nodes, with 0.2-0.5 mm retrorse ± appressed nonglandular trichomes. Stipules linear-lanceolate, distinct. Leaves opposite; petiole with 0.2-0.4 mm retrorse ± appressed nonglandular trichomes; leaf blade 1.1-3.3 cm, palmately cleft, ratio of main sinus/middle segment length = 0.74-0.84, pilose with appressed nonglandular trichomes; segments 5, obtriangular, 1.4-4.6 mm wide at base, 3(-5)-lobed in distal half, ratio of second sinus/middle segment length = 0.13-0.3. Cymules solitary, 1-flowered; peduncle 2.5-7.2 cm. Pedicel 1.1-3.6 cm, with 0.1-0.4 mm retrorse ± appressed nonglandular trichomes; bracteoles linear-lanceolate. Sepals 4.1-6.4 mm, mucro 0.9-1.8 mm, ratio of mucro/sepal length = 0.14-0.43, outside with 0.1-0.9 mm antrorse appressed nonglandular trichomes and scattered 0.5-1.3 mm patent glandular trichomes, inside ± with trichomes. Petals white or pale pink with purplish veins, (5.2-)7.2-8.4(-12.7) mm, erect to patent, basally both surfaces and margin with few trichomes, apex rounded. Staminal filaments white, lanceolate with an abruptly narrowed apex, abaxially pilose and proximal half ciliate, trichomes 0.1-0.3 mm; anthers violet, 0.5-1 mm. Nectaries 5, hemispheric, glabrous. Stigma greenish. Fruit 1.7-2 cm, erect when immature; mericarps smooth, with a basal callus, with 0.2-0.6 mm ± patent nonglandular trichomes; rostrum 1.2-1.6 cm, with a 0.5-1.5 mm narrowed apex; stigmatic remains 0.4-1.9 mm. Seeds 1.8-2 mm. Fl. Jul, fr. Aug.

Taiwan.

● Trailsides on mountain slopes, moist stony soil on semiexposed stream banks; 2500-3200 m.

Geranium suzukii là một loài thực vật có hoa trong họ Mỏ hạc. Loài này được Masam. mô tả khoa học đầu tiên năm 1931.

山牻牛儿苗（学名：Geranium suzukii），又名黄花老鹳草，为牻牛儿苗科老鹳草属的植物，为台灣的特有植物。分布于台灣本島，目前尚未由人工引种栽培。