Asteraceae |
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Tanacetum argyrophyllum (C. KOCH) TVZEL. var. subvirescens (DC.) GRIERSON |
Tanacetum argyrophyllum (C. KOCH) TVZEL. var. subvirescens (DC.) GRIERSON |
Tanacetum L. (EMEND. BRIQ.) |
T. argyrophyllum (C.Koch) Tvzel. in Sched. Herb. Fl. URSS 16:121 (1966). Figure 14, p. 267. Rootstocks woody, rhizomatous and often fibrous. Stems 25-40 cm, leafy, greyish-tomentose. Basal leaves 2-3-pinnatisect, 10-20 cm on 3-8 cm petioles, oblanceolate in outline, primary segments 12-17-paired, 1-4 cm, secondary segments 5-10-paired, 1-7 x 0.5-3 mm, simple or 3-9-lobed, lobes obtuse or sub-acute, ± densely greyish-tomentose and glandular-punctate; cauline leaves similar, becoming smaller and sessile above, uppermost often 1-pinnatisect. Capitula numerous (20-120) in terminal corymbs. Involucre 3-4(-6) mm broad; phyllaries usually pale-margined, outer lanceolate, 2 x 0.4 mm, inner linear-oblanceolate, obtuse, scarious at apex, 2.5-3.5 x 0.75-1.25 mm. Female flowers 8-12, inconspicuous, 2.75 mm, 3-5-lobed at apex, yellow. Disc flowers 2.5 mm. Achenes 4-5-ribbed, 1.5-1.75 mm; corona ± entire, c. 0.3 mm. Fl. 6-8. Stream-sides, rocky slopes and scree, 760-2900 m. 1. Basal leaves (incl. petiole) usually less than 15x2 cm; involucre 3-4 mm broad var. argyrophyllum 1. Basal leaves (incl. petiole) 20-28 x 3-5 cm; involucre 5-6 mm broad 2. Rachises broad (1.5-2 mm), decurrent between lobes and segments var. polycephalum 2. Rachises narrow (less than 1 mm), not decurrent between lobes and segments var. subvirescens var. subvirescens (DC.) Grierson in Notes R.B.G. Edinb. 33:434 (1975). Syn: Pyrethrum myriophyllum Meyer var. subvirescens DC, Prodr. 6:59 (1838); Type: [Soviet Azerbaijan] Karabagh et Aderbidjan Persiae, Szovits (photo E!). E. Anatolia. A7 Gümüşane: Koesedagh (Köse Da.), Sint. 1890:3254! B8 Erzurum: 10 km N. of Hinis, 1630 m, D. 46235! B9 Van: 24 km from Gürpınar to Hoşap, 2000 m, D. 44696! C10 Hakkari: 27 km from Yüksekova to Şemdinli, 1850 m, D. 45067! N. & N.W. Iran. Ir.-Tur. element. |