Peucedanum longibracteolatum

Peucedanum longibracteolatum

Dallı rezene

Erect, glaucous, completely glabrous, one-stemmed, short-lived, possibly monocarpic perennial or biennial, 180-250 cm tall. Rootstock woody, 10-15 mm in diam., weakly branched, oblique, with a short, non-fibrous collar up to 25 mm. Stems fairly slender, 8-9 mm in diam. at base, terete, solid, with distinct white medulla, striolate, greyish green, branching in a 30-35° angle, already from near the base. Leaves greyish green to glaucous, subcoriaceous, with prominent veins, flat except for the weakly enrolled margin, mostly basal, soon withering and lacking after anthesis. Basal leaves 5-8, lamina oblong to oblong-ovate in outline, 15-40 × 3-15 cm, 1-pinnate, petioles 6-18 cm long, canaliculate, sheaths 1-3 cm long; segments deltoid to ovate, 2.5-8 × 2-6 cm, triternate, deeply incised to subpinnatifid, narrowed into a 0.3-2.5 cm long petiolule or subsessile with a cuneate base; terminal segments equalling the lateral segments in size; ultimate segments oblong, oblong-ovate to narrowly ovate, cuneate at base, apex rounded, hyaline-mucronulate. Cauline leaves few, becoming upwards increasingly smaller and simpler, reduced, pinnatifid, 2-3 cm long, segments narrowly lanceolate, 1-2.5 × 0.2-0.3 cm, apex acute, often extended into a hyaline awn, those supporting inflorescence branches often with a broad hyaline margin in lower parts . Synflorescence composed of long-pedunculate compound umbels, unequally 5-9-rayed, rays 0.5-4 cm long, stout, flattened to rounded rectangular in transverse section , striate, waxy-glaucous. Bracts 0. Flowers small, 2.5-3.5 mm in diam., all perfect, pedicellate, 8-9 in each umbellule. Bracteoles normally 5, very unequal in length , persistent, spreading- erect, glaucous, flushed purple with age, subulate to filiform, the 2 smaller ones 1-5 mm long, the 3 longer ones radiate, on long-rayed umbels extending 15-30 mm. Pedicels fairly stout, rounded quadrangular, 0.4-0.5 mm in diam., unequal, 3-6 mm long. Sepals obsolete. Petals outside with a greenish base, in all other parts purplish with darker margin and oil-duct, ovate to obovate, thick, inflexed, shallowly emarginate, with hyaline, truncate retuse tip, 2 × 1.5 mm. Stamens enrolled; filaments pale brownish to yellowish, c. 1.5 mm long; anthers yellowish to yellow, subglobular, 0.6-0.8 mm, dorsally inserted. Stylopodium flattened, with undulate margin, yellow or purplish, glabrous. Style c. 1 mm, slender, deflexed, purple, stigma capitate, brownish. Ovary urn-shaped, c. 2 × 1.3-1.5 mm, yellowish green to green . Fruit straw-coloured or different shades of purple except ribs and wings, ovoid to nearly circular, flattened. Mericarps 5-6 × 5-5.6 mm, with narrow but distinct spongiose wings c. 0.7 mm wide, 5-ribbed; oil-ducts prominent, not associated to vascular bundles, 4 vallecular, 2 commissural, extending to the base of the mericarps. Chromosome number: 2n = 22.

Endemic.

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