Richteria pyrethroides Kar. & Kir.

Caespitose, arachnoid hairy, up to 30 (-35) cm tall shrublet, with several, greyish branches from the woody rootstock. Leaves grayish-green, densely tomentose, basal leaves petiolate, petioles nearly half as long as lamina, broadened and sheathing the stem, lamina oblong, (5-) 6 – 8 x 1.4 – 1.8 cm, bipinnatisect into lanceolate, 0.5 – 0.8 mm wide, hyaline-mucronulate ultimate segments; upper and mid-stem leaves short-petioled to sessile, reduced to linear, entire laminas. Capitula radiate, 2 – 3.5 cm across, solitary, rarely 2-3 on ± tomentose peduncles. Involucre broadly napiform, 7 – 15 mm across, loosely tomentose, phyllaries herbaceous, outermost lanceolate, much shorter than the inner, inner pale-green outside, with broad brown scarious margins. Ray-florets with oblong, 7 – 15 x 3 – 5 mm, white to pink limb from 1.5 – 2 mm long corolla tube. Disc-floret corollas golden yellow, 2.5 – 3 mm long. Cypselas ± obconic, 2.5 – 3 x 0.6 – 0. 8 mm, 5-9-costate. Pappus corona-shaped, 0.5 – 1.5 mm long, dissected regularly into linear-oblong, irregularly toothed with 5-9 lobes.

Fl. Per.: July-September.

In dry scrubby, pebbly and gravel mixed sands on hill slopes above 2000 m.

Tanacetum pyrethroides (Kar. & Kir.) Schultz.-Bip. in Pollichia 20/21: 441. 1863; Podlech in Rech. f., Fl. Iran. 158: 106. t. 94. 1986; Chrysanthemum richteria Benth. in Benth. & Hook.f., Gen. Pl. 2: 426. 1873; Hook. f., Fl. Brit. Ind. 3: 315. 1881; Chrysanthemum pyrethroides (Kar. & Kir.) B. Fedtsch., Rast. Turkest. 737. 1915; R.R.Stewart, Ann. Cat. Vasc. Pl. W. Pak. & Kashm. 732.1972; B.D.Naithani in Hajra et al, Fl. Ind. 12: 49. 1995; Pyrethrum pyrethroides (Kar. & Kir.) B. Fedtsch. ex Krasch. in Acta Inst. Bot. Acad. Sci. URSS ser. 1, 1: 176. 1933; Tzvelev in Schischk. & Bobrov, Fl. USSR 26: 245. 2000 (Engl. transl.).