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83. Ostericum Hoffmann, Gen. Pl. Umbell., ed. 2. 162. 1816.

山芹属 shan qin shu

Pan Zehui (潘泽惠); Mark F. Watson

Gomphopetalum Turczaninow.

Herbs, perennial. Stem hollow, ribbed. Petiole sheaths inflated; leaf blade 2–3-ternate-pinnate. Umbels compound, terminal and lateral; bracts few, lanceolate or linear-lanceolate; bracteoles several, linear to linear-lanceolate. Calyx teeth conspicuous, triangular or ovate. Fruit oblong-ovoid, base cordate, flattened dorsally; surface covered with many convex and shining dots; dorsal ribs prominent, the lateral broadly thin-winged; vittae 1–3 in each furrow, 2–8 on commissure; mesocarp thin, hollow in mature fruit. Seed face plane. Carpophore 2-cleft to base.

About ten species: C and E Asia, E Europe; seven species (three endemic) in China.

Ostericum is closely allied to Angelica; see the taxonomic comment under that genus.

1 Ultimate leaf segments linear or oblong-lanceolate, entire or inconspicuously serrulate.   (2)
+ Ultimate leaf segments ovate to broad-elliptic, margin serrate, crenate or incised.   (3)
2 (1) Ultimate leaf segments entire; bracts 1–3, 5–8 mm.   1 Ostericum maximowiczii
+ Ultimate leaf segments margin inconspicuously serrate; bracts 6–8, ca. 4 mm.   2 Ostericum citriodorum
3 (1) Central umbels with short peduncles, lateral umbels opposite or cyclic with long peduncles; petals green.   3 Ostericum viridiflorum
+ Central umbels with long peduncles, lateral umbels not opposite nor cyclic, with short peduncles; petals white.   (4)
4 (3) Fruit vittae 1–3 in each furrow, 4–8 on commissure.   (5)
+ Fruit vittae 1 in each furrow, 2 on commissure.   (6)
5 (4) Bracts 2–5; fruit suborbicular, 5–7 mm.   4 Ostericum scaberulum
+ Bracts 1–2; fruit ellipsoid, 4–5.5 mm.   5 Ostericum sieboldii
6 (4) Petioles acute-triangular; bracts 1–4, unequal, apex long-aristate.   6 Ostericum huadongense
+ Petioles rounded; bracts 4–8, equal, apex acute.   7 Ostericum grosseserratum

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