斑点虎耳草 ban dian hu er cao

Micranthes aestivalis (Fischer & C. A. Meyer) Small; M. nelsoniana (D. Don) Small; Saxifraga aestivalis Fischer & C. A. Meyer; S. punctata Linnaeus subsp. nelsoniana (D. Don) Hultén; S. punctata var. nelsoniana (D. Don) Engler.

Stem 22-33 cm tall, glandular pilose. Petiole 4-10.7 cm, glandular pilose; leaf blade reniform, 1.6-5.5 × 1.9-6.5 cm, adaxially glandular pubescent, palmately veined, margin 19-21-dentate, glandular ciliate, teeth broadly ovate. Inflorescence paniculate, 5-15 cm, 30-52-flowered; branches and pedicels glandular hairy. Hypanthium ca. 0.6 mm, glabrous. Sepals reflexed, ovate to broadly so, 0.7-1.3 × 0.7-1 mm, glabrous, 1-veined. Petals white or lilac, ovate, 2.1-2.7 × 1.6-1.8 mm, 1-veined, base contracted into a claw 0.5-0.7 mm, apex retuse. Stamens 2-3 mm; filaments clavate. Carpels subsuperior to superior, united only at base, purple or green, conical, with a basal, annular nectary; styles erect or slightly spreading, 0.2-0.5 mm; follicles erect or slightly divergent, bottle-shaped, 5-6 mm. Fl. Jul, fr. Aug. 2n = 28, 30, 32, 40, ca. 60, 70, 76, 80, 84, ca. 88.

Pinus koraiensis forests, forest margins, rock crevices; 1700-2300 m. Heilongjiang, Jilin, Nei Mongol [Korea, Mongolia, Russia; North America].

The name Saxifraga punctata Linnaeus has become hopelessly confused in the literature and, following Webb (Repert. Spec. Nov. Regni Veg. 69: 153-154. 1964), the present authors have abandoned it as a nomen confusum. The type of S. punctata actually belongs to the species known widely as S. davurica Willdenow. The next available name for the species under consideration is S. nelsoniana.