黑苞匹菊 hei bao pi ju

Pyrethrum krylovianum Krascheninnikov, Bot. Mater. Gerb. Bot. Inst. Komarova Akad. Nauk S.S.S.R. 9: 155. 1946; P. alatavicum (Herder) O. Fedtschenko & B. Fedtschenko subsp. krylovianum (Krascheninnikov) Boldyreva.

Herbs, perennial, 30-70 cm tall; stems solitary or clustered, erect, few branched or not, very sparsely pilose. Basal and lower stem leaves petiolate; leaf blade narrowly elliptic, 5-20 × 2-5 cm, 2-pinnatisect, both surfaces green, very sparsely pilose or glabrous; primary lateral segments 7-12-paired; ultimate segments obliquely triangular, lanceolate, broadly linear, or linear. Middle and upper stem leaves similar, small, sessile. Synflorescence a ± flat-topped terminal cyme. Capitula 1-3. Involucre coryliform, ca. 16 mm in diam.; phyllaries in 4 rows, scarious margin broad, brown, outer phyllaries ovate, ca. 3 mm, middle and inner ones elliptic or broadly linear, 4-7 mm. Ray florets white; lamina narrowly elliptic, 1.4-2.5 cm, apex 2- or 3-denticulate. Achenes ca. 2.5 mm. Corona 0.4-0.7 mm, lobed for ca. 1/2 length. Fl. and fr. Aug-Sep.

Forest understories, alkaline soils; 2500-3200 m. Xinjiang [Kazakhstan, Mongolia, Russia].