Tripleurospermum decipiens (Fisch. & C. A. Mey.) Bornm.

Very closely related to T. disciforme (C. A. Mey.) Schultz Bip. but differing in its very shortly coronate, anteriorly rugose cypselas and ovoid receptacle.

Erect, up to 1 m tall, annual or biennial, whitish-hairy herb, with corymbose branches above. Leaves narrowly oblong, 6 – 9 x 1 – 2 cm, basal long-petioled, becoming sessile above, broader towards the base, uni- or bipinnatisect into linear, or setaceous linear, mucronate ultimate segments. Capitula numerous, 8 – 10 mm across, disciform, rarely discoid, on 5 – 10 cm long, apically widened, unequal-sized peduncles, in lax panicle-like corymbs, heterogamous. Involucre broadly napiform, phyllaries broadly white-membranous on margins, 2-seriate, more or less equal in size, lanceolate to oblanceolate, obtuse. Receptacle oblong-ovoid. Marginal florets female, few, corolla tube flattened-fissured apically and with much reduced or almost absent ligules. Disc-florets numerous, bisexual, corolla tube with 5, apically glandulose triangular teeth. Cypselas obyramidate, 1 – 1.5 mm long, brown, rugose on both sides, ventrally with 3, white, thin acute ribs, beset with 2, dark red hair-like glands at apices on dorsal side. Pappus very short, coronate, lobed, white-mambranous.

Distribution: Turkey, Caucasus, Iran, Afghanistan, and Pakistan.

Fl. Per.: June-August.

Pyrethrum decipiens Fisch. & C. A. Mey., Ind. Sem. Horti Petrop. 2: 48. 1835; Matricaria decipiens C. Koch in Ind. Sem. Hort. Berol. App. 14. 1855; R.R.Stewart, l. c., 766; Chamaemelum decipiens (Fisch. & C. A. Mey.) Boiss., Fl. Or. 3: 328. 1875.