Approximately 130.
It flowers in June-July and fruits in July-August.
It has dichasial cymes, with a peduncle 7-10 cm long; bracts lanceolate to narrowly ovate-lanceolate, (3-) 5-6 (-7) mm long, white on the edge, membranous; sepals ovate-lanceolate, (4-) 5-7 mm long, gradually pointed at the apex, membranous on the edge, with 3 obvious veins below; petals white, 4-7 mm long, deeply 2-lobed nearly to the base, equal to or slightly longer than sepals, lobes nearly linear, slightly narrowed at the base, blunt-pointed at the apex; stamens 10, slightly shorter than sepals; ovary ovate, with numerous ovules; styles 3, thread-like, 3 mm long.
St. dilleniana Moench, St. glauca With., St. hsinganensis Kitagawa