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FOC | Family List | FOC Vol. 14 | Apiaceae

9. Osmorhiza Rafinesque, Amer. Monthly Mag. & Crit. Rev. 4: 192. 1819, nom. cons.

香根芹属 xiang gen qin shu

She Menglan (佘孟兰 Sheh Meng-lan); Mark F. Watson

Uraspermum Nuttall, nom. rej.

Herbs perennial. Stem erect or decumbent at base, branched, glabrous or pubescent. Petiole sheath narrow, scarious; leaf blade triangular-ovate in outline, 2–3-ternate-pinnate (Chinese species); segments serrate to pinnatifid. Umbels loosely compound; peduncles terminal and lateral, usually exceeding the leaves; bracts few or absent; rays few, slender, unequal, lengthening and spreading in fruit; bracteoles several or occasionally absent, reflexed. Calyx teeth obsolete. Petals white, purple or greenish yellow, spatulate to obovate with a narrow inflexed apex. Stylopodium conic; styles slender, sometimes minute. Fruit (Chinese species) narrowly clavate, terete to slightly laterally flattened, apex obtuse, base caudate; ribs filiform, acute, with apically pointed bristles; vittae obscure or absent. Seed subterete in cross section, face concave. Carpophore bifid at apex, cleft up to 1/2 of its length.

About ten species: disjunct between E Asia and North America; one species in China.

1 Leaf segments ovate-oblong, the basal pair undivided usually deeply dentate.   1a var. aristata
+ Leaf segments broadly ovate to broadly oblong-ovate, the basal pair 2-lobed or deeply 2–3-parted, usually irregularly coarsely toothed.   1b var. laxa

Lower Taxa


Related Objects  
  • WEN Jun et al. 2002. Phylogenetic and biogeographic diversification in Osmorhiza (Apiaceae)
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