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Mitella Linn.

唢呐草属

Description from Flora of China

Herbs perennial. Rhizomes creeping, short. Leaves mainly basal, long petiolate, cauline ones few or absent; stipules scarious; leaf blade simple, cordate or ovate- to reniform-cordate, margin lobed or incised. Inflorescence terminal, racemose, bracteate. Flowers small. Sepals 5. Petals sometimes absent, margin usually pinnately cleft, rarely entire. Stamens 5 or 10. Carpels 2, connate; ovary appearing subsuperior to inferior, 1-loculed; placentas 2, parietal; styles 2. Fruit a capsule, dehiscing between styles. Seeds numerous, ovoid or narrowly ellipsoid, usually tuberculate.

As currently circumscribed, Mitella is not a natural group, but comprises several distinct lineages that should ultimately be treated as distinct genera. Mitella nuda is most closely related to M. diphylla from E North America, whereas M. formosana is most closely related to other Asian species of Mitella that appear to form a lineage distinct from all other species currently placed in the genus.

About 20 species: E and N Asia, North America, one species (Mitella nuda) nearly circumboreal: two species (one endemic) in China.

(Authors: Pan Jintang; Douglas E. Soltis)


 

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