Peucedanum isauricum

Toros hınzırı

Slender, erect, completely glabrous, one-stemmed perennial, 40-80 cm tall. Rootstock relatively weak, 0.5-1 cm in diam., with a short, but dense fibrous collar. Stems slender, 2-2.5 mm diam. at base, solid, very finely striolate, greyish green, with inflorescence-bearing branches in upper 2/3, usually somewhat flexuous. Leaves mostly basal , distinctlyheteromorphic, with the different leaf types gradually merging into one another, all with acute apices. Radical leaves rather few , soon withering and only present in not yet flowering plants, flat, outermost with lamina deltoid to broadly oblong-deltoid in outline, 1.2-3 × 1.2-3.5 cm, triternate, segments obovate, c. 0.7-3 × 0.5-1.7 cm, deeply incised to subpinnatifid, cuneate at base, terminal segment slightly larger than the laterals; petioles pale greyish green, very variable in length, 1.5-14 cm long, canaliculate with involute margins, basal sheath 1-1.5 cm; subsequent 2 or 3 leaves with lamina broadly ovate to oblong in outline, 2.5-7 × 2-8 cm, 2-pinnate, primary segments only 2 and remote, broadly lanceolate, 0.7-5.5 × 0.6-2 cm, cuneate at base, ultimate segments lanceolate to linear, apex acute; petioles 2-4.5 cm long, deeply canaliculate with involute margins, basal sheaths 1-5 cm long; basal and lower cauline leaves 3-6, withered at fruiting time, lamina ovate to broadly rounded, triangular in outline, 11-17 × 8-18 cm, commonly 1-pinnate with only 2 pairs of grass-like pinnules, very rarely 2-pinnate, ultimate segments 2-5 cm distant, linear to very narrowly lanceolate, c. 4-14 × 0.1-0.3 cm, subsessile with a very narrow cuneate base, ± flat, margin entire, sometimes with 1 or 2 teeth-like subdivisions on either side, all segments on the lower face with a prominent, paler mid-vein and distinct marginal veins, causing a moderate thickening and weak enrolling of the margin, apex long extended to subulate, terminal segment larger than the lateral ones; leaf margins and veins with distinct epidermal denticulation; petioles 7-18 cm long, deeply canaliculate with involute margins, basal sheath 3-8 cm long; upper cauline leaves few, upwards increasingly smaller, simpler, more reduced, uppermost usually simple, 0.5-4 cm long, linear or subulate and sessile, supporting inflorescence branches. Synflorescence a junciform panicle bearing compound umbels. Umbels commonly obsoletely 3-rayed, towards the ends of branches only 2-rayed, subsessile or on 2-15 mm long, thin, angled peduncles; rays distinctly unequal, one subsessile, longest to 15 mm. Bracts 0-1, 4-5 × 1.5-2 mm, pale brown, narrowly lanceolate to subulate, occasionally tapering into a long acumen, somewhat amplexicaule, with broad membranaceous margins. Flowers small, rather inconspicuous, c. 2.5 mm in diam., all perfect, pedicellate, 5-6 in each umbellule. Bracteoles normally 5, very rarely only 4 or, up to 7 of umbellule with more than 5 flowers, persistent, spreading-erect, pale brown, lanceolate, with a conspicuous membranaceous margin, 1/3 as long as or equalling the 2-3 mm long, filiform pedicels. Sepals obsolete. Petals white, obovate with an extended, strongly inflexed, entire, truncate-retuse tip, c. 1.2-0.6 mm, with a yellowish, conspicuous oil-duct. Stamens spreading; filaments white, 1.5-1.8 mm long; anthers yellowish, subglobular, 0.6-0.7 × 0.5-0.6 mm, dorsally inserted. Stylopodium broadly conical, greenish or pinkish, with large, bulging papillae. Styles c. 1 mm long, slender, deflexed. Fruit straw-coloured, ovoid, dorsally compressed, flattened. Mericarps 4.5-5.5 × 3-3.5 mm, ovoid, with wings only c. 0.5 mm wide, inconspicuously 5 ribbed, oil-ducts prominent, 2 of them commissural, 4 vallecular and 5 in the ribs . Embryo dicotylar. Hypocotyl stout, fleshy. Cotyledons of seedlings glabrous, with a lamina c. 10 × 3 mm, linear-oblong or ligulate to narrowly spatulate, apex obtuse, tapering into a c. 7 mm long petiole, which is dilated and sheathing at the base, channelled above.

Endemic.