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45. Rhaponticoides Vaillant, Königl. Akad. Wiss. Paris. 5: 165. 1754.

欧亚矢车菊属 ou ya shi che ju shu

Authors: Zhu Shi & Ludwig Martins

Bielzia Schur.

Herbs, perennial. Rhizome woody. Stem usually solitary, glabrous, covered with ± lanate remains of old leaves at base. Leaves pinnate, pinnatisect, or bipinnatisect, glabrous, margin argutely toothed; teeth white cartilaginous at apex; leaf segments usually strongly asymmetric at base, decurrent on rachis. Capitula heterogamous, solitary at end of stem and branches. Phyllaries broadly ovate, glabrous, base rounded. Corolla yellow or sulfureous; corolla of marginal florets not or scarcely radiant, sterile, with staminodes. Achene brown, yellowish near base, blackish near apex. Pappus elements of two types; outer pappus elements in many rows, bristlelike, scabrid; inner pappus elements in 1 row, scalelike, much shorter than to almost as long as outer ones, sometimes excurrent into a longer bristle.

About 30 species: N Africa, C and SW Asia, Europe; three species in China.


1 Middle phyllaries with very narrow (ca. 0.2 mm wide) inconspicuous hyaline margin, without apical appendage.   1 R. ruthenica
+ Middle phyllaries appendaged or with more than 1 mm wide hyaline margin   (2)
       
2 (1) Primary segments of lower leaves undivided, oblong to narrowly elliptic.   2 R. kasakorum
+ Primary segments of lower leaves irregularly pinnatipartite to pinnatisect.   3 R. dschungarica

Lower Taxa


 

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