1. Mitella nuda Linnaeus, Sp. Pl. 1: 406. 1753.
唢呐草 suo na cao
Herbs perennial, 9-24 cm tall. Rhizomes elongate, slender. Stems glandular hairy. Basal leaves 1-4; petiole 1-8.3 cm, rigidly glandular hairy; leaf blade orbicular to cordate to reniform-cordate, 0.8-3.7 × 0.8-3.9 cm, both surfaces rigidly glandular hairy, base cordate, margin dentate, obscurely 5-7-lobed. Cauline leaves usually 1 or absent, shortly petiolate; leaf blade ca. 1.6 × 1.4 cm, rigidly glandular hairy. Inflorescence a raceme, 2-11 cm, several flowered; pedicels 1-5 mm, shortly glandular hairy. Sepals subovate, 1.6-2 mm, 1-veined, apex subacuminate. Petals yellowish green, ca. 4 mm, margin deeply pinnately ca. 9-cleft; segments linear. Stamens 10, shorter than sepals. Carpels 2, connate; ovary semi-inferior, broadly ovoid; stigmas 2-lobed. Fruit a capsule; carpels distally free, glandular hairy. Seeds few, black, shiny, narrowly ellipsoid, ca. 1 mm. Fl. Jun-Sep. 2n = 14, 28.
Wet forests, bogs; 700-1100 m. Heilongjiang, Jilin, Nei Mongol [Japan, Korea, Mongolia, Russia; North America].