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32. Prangos Lindley, Quart. J. Sc. Lit. Arts. 19: 7. 1825.

栓翅芹属 shuan chi qin shu

Pan Zehui (潘泽惠); Mark F. Watson

Herbs, perennial. Root long-conic, woody. Stem erect, branched, base clothed in stiff or fibrous remnant sheaths. Basal leaves caespitose, petiolate, sheathing at base; blade 3–4-pinnate; ultimate segments linear, entire. Leaves reduced upwards. Umbels compound, terminal or lateral; bracts several, linear or lanceolate; bracteoles similar to bracts. Calyx teeth obsolete. Petals white or yellow, ovate or elliptic, apex incurved. Stylopodium depressed, almost hidden in the apex of mature fruit; styles short, spreading. Fruit oblong to ellipsoid, somewhat dorsally compressed; ribs 5, dorsal ribs filiform, lateral ribs winged, or all ribs inconspicuous; mesocarp thick, corky; vittae numerous, small, encircling seed. Seed face inflexed into a deep T-shaped groove. Carpophore 2-parted.

About 30 species: C and SW Asia, Mediterranean region; four species in China.

Several conflicting taxonomies exist for Prangos and the related genera Cachrys Linnaeus, Cryptodiscus Schrenk, Hippomaranthum Link, and Neocryptodiscus Hedge & Lamond. The genus is treated here in the broad sense.

1 Petals white; fruit subspherical, 4–9 mm.   (2)
+ Petals yellow; fruit oblong- or obovoid-ellipsoid, 9–18 mm.   (3)
2 (1) Leaf blades oblong, 10–30 × 3–5 cm; rays hispid; ovary densely hispid.   1 Prangos cachroides
+ Leaf blades broad-ovate, 10–15 × 5–10 cm; rays glabrous; ovary glabrous.   2 Prangos didyma
3 (1) Ultimate leaf segments densely hairy; fruit oblong-ellipsoid; ribs inconspicuous.   3 Prangos herderi subsp. xinjiangensis
+ Ultimate leaf segments glabrous; fruit obovoid-ellipsoid; primary and secondary ribs conspicuous   4 Prangos ledebourii

Lower Taxa


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