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FOC | Family List | FOC Vol. 20-21 | Asteraceae | Richteria

1. Richteria pyrethroides Karelin & Kirilov, Bull. Soc. Imp. Naturalistes Moscou. 15: 127. 1842.

灰叶匹菊 hui ye pi ju

Chrysanthemum arassanicum C. Winkler; C. artemisiifolium Klatt; C. pyrethroides (Karelin & Kirilov) B. Fedtschenko; C. richteria Bentham; C. transiliense (Herder) Mink-witz; Pyrethrum arassanicum (C. Winkler) O. Fedtschenko; P. pyrethroides (Karelin & Kirilov) B. Fedtschenko ex Krascheninnikov; P. transiliense (Herder) Regel; P. transiliense var. subsessile Regel; P. transiliense var. subvillosum Regel; P. transiliense var. tomentosum Regel; Tanacetum transiliense Herder.

Herbs, perennial, (5-)10-40 cm tall, rhizomatous; stems erect or ascending, base covered with sheathing leaf bases, fascicled, rarely solitary, few branched or not, gray-white, villous with curved long simple hairs especially below capitulum. Basal leaves: petioles to 4 cm; leaf blade narrowly elliptic, 1.5-7 × 0.6-2 cm, 2-pinnatisect, both surfaces gray-white, densely or sparsely villous; primary lateral segments 3-8-paired; ultimate segments linear-lanceolate or ovate-lanceolate, sessile, rather small. Synflorescence terminal, with 1(-3) capitula, not conspicuously flat-topped. Involucre coryliform, 1-1.4 cm in diam.; phyllaries in 4 rows, scarious margin dark brown, outer phyllaries ovate or long ovate-triangular, 3-4(-6) mm, middle and inner ones narrowly lanceolate or oblanceolate, 5-15 mm, middle ones abaxially densely villous with fluffy curved long simple hairs, inner ones glabrous or nearly so abaxially. Ray florets white or pale red; lamina elliptic or narrowly elliptic, 5-15 mm, apex 3-denticulate. Achenes ca. 2.5 mm. Corona ca. 1 mm, divided to base. Fl. and fr. Jun-Aug.

Meadows, rocky mountain slopes, floodlands; below 3700 m. Xinjiang [N India, Kazakhstan, Russia, Uzbekistan].


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