| Brassicaceae |
|---|
Isatis takhtajanii AVETISIAN |
 Isatis takhtajanii AVETISIAN |
Isatis L. |
| I. takhtajanii Avetisian in Izv. Akad. Nauk Arm., 14(3): 77, 78, f. 1 (1961). Ic.: Not. Syst. Tiflis 23: 79, f. 1 (1963). Figure 16, p. 293. Strongly perennial, stems 25-50 cm, few-branched. Leaves thin, varying from glabrous (in type) to hirsute-pubescent, glaucescent when dry: basal leaves obovate-oblong, subentire; median stem leaves narrowly oblong, rather shortly and obtusely auricled. Flowers 3-4 mm, sepals sparsely pilose. Fruit elliptic-oblong, (7-)9-15 × 3-4 mm, shortly attenuate below, apex rounded, glabrous or shortly velutinous at the loculus, wing thick, usually narrower than loculus, mid-rib slender. Fl. 6-7. Rocky slopes, 2200-3600 m. Type: [Soviet Armenia] mons Kaputdschuch, macrodeclive orientale, in schistoso-lapidosis, 3400 m, 12 vii 1950, A. Takhtajan (holo. ERE!). Kurdistan, Upper Euphrates & Anti-Taurus. B6 Maraş: d. Göksun, Binboğa Da. above Yalak, 2200-2300 m, D. 20131! B7 Erzincan: Keşiş Da. above Cimin, 2800-2900 m, D. 31790! B9 Van: Ispiriz Da., 3200 m, D. 23783! Bitlis: Süphan Da., 3000 m, D. 24743! C9 Hakkari: Cilo Da.. 10 km W of Cilo Tepe. D. 24194! Soviet Armenia; N. Iraq? Ir.-Tur. element. Allied to I. kozlowskyi (q.v.). It may be distinguished from I. tinctoria (whose subsp. corymbosa approaches it in fruit shape) by its strongly perennial habit and subobtuse auricles. |