1. Tanacetopsis eriobasis (Rech. f.) Kovalevsk., Novosti Sist. Vyssh. Rast. 9: 270. 1972.
Chrysanthemum eriobasis Rech. f. in Dan. Biol. Skr. 8, 2: 44. 1955; Cancrinia eriobasis (Rech. f.) Tzvelev in Schischk. & Bobrov, Fl. URSS 26: 308. 1961; Tanacetum eriobasis (Rech. f.) Kovalevsk. in Not. Syst. Herb. Inst. Bot. & Zoo. Acad. Sci. Uzb. SSR 16: 23. 1961; Podlech in Rech. f., Fl. Iran. Comp. IV. 158: 129. t. 122. 1986.
Erect, up to 40 – 75 cm tall shrublet with fibrous dilated bases of petioles on the woody, much branched, 1.5 – 2 cm thick rootstock producing short suckers. Leaves congested in a rosette, shortly petiolate, eventually laxly arachnoid hairy to sometime ± glabrous, oblong, 10 – 20 cm long, regularly 3-4-pinnatifid or pinnatipartite into linear to linear-lanceolate, 2 – 4 mm long, up to 1.2 mm wide, acute ultimate segments; upper leaves similar to basal, remote, sessile, reduced in size upwards; rhachis narrow, entire. Capitula numerous, c. 8-10 mm across, shortly peduncled, in lax divaricately branched corymbs. Involucre turbinate (napiform), phyllaries greenish-yellow, narrowly linear, 4 – 5 mm long, glabrous to subglabrous or beset with long patent hairs or basally short ciliate, subacute to ± obtuse, narrowly hyaline-margined. Receptacle hemispherical, glabrous. Florets yellow to golden-yellow, corolla tube c. 2 mm long, shortly 4-toothed, beset with sessile glands. Cypselas narrowly oblong, c. 1.5 mm long, dilated upwards, mildly 5-ribbed, apically oblique-truncate. Pappus up to 0.5 mm long, dissected up to the base.
Fl. Per.: July-September.
Type: Afghanistan, Nozi, 2700 m, W. Koelz 11988 (W).
Distribution: Afghanistan and Pakistan.
Podlech (l.c.) recognized two subspecies under Tanacetum eriobasis (Rech.f.) Kovalevsk. subsp. eriobasis, present in Afghanistan and Pakistan and subsp. tricholepis Podlech [Tanacetopsis eriobasis subsp. tricholepis (Podlech) Qaiser] which is confined to Afghanistan.