Pteronia anisata B.Nord.

A strongly aromatic, much-branched shrublet, 2-3 dm high, glabrous except in leaf-axils. Young branches brown, sulcate; older branches with sooty grey cortex. Leaves opposite, ± spreading, flexuous, longer than the internodes, linear-filiform, somewhat flattened or subtrigonous 1-2 cm long, c. 1.5 mm thick, green, minutely papillate-colliculate with resin dots, subacute; leaf-base half-clasping, with a tuft of long weak hairs in the axil, Capitula terminal, solitary, 7-8-flowered, sessile or nearly so (uppermost leaves reduced and ± transitional to involucral scales, 2-5 mm long). Involucre oblong-cylindrical or somewhat campanulate, c. 1 cm high, 5-6 mm wide, obtuse in bud, with rounded-obtuse base. Involucral scales 15-20, 3-4-seriate, oblong or ovate-oblong, coriaceous, straw-coloured and towards the tip brownish, obtuse, with three brown, resiniferous lines, and with distinct white, membranous margins; outermost scales short, thickish and subcarnose, somewhat greenish, c. 3 mm long and 1.5 mm wide; innermost scales c. 1 cm long and 3-4 mm wide. Receptacle clavate, c. 2 mm high and wide (at the base 1.4 mm wide), glabrous, apically truncate and alveolate with 1-1.5 mm long, acutely lobed and fringed scales. Corolla yellow, 7-7.5 mm long; tube 2 mm long, 0.8 mm wide; limb cylindric, 5-6 mm long, 1.2-1.4 mm wide, sparsely puberulous towards the base; lobes triangular-ovate, 1 mm long, 0.6-0.8 mm wide, acute, with a few resin glands on the exteriors. Anthers 3 mm long incl. the narrowly ovate, acute appendage. Style branches 2.5-3 mm long, apically shortly hairy, flattened, subacute, with two resin glands on the exteriors. Pappus bristles numerous (c. 130-150), 5-6 (at length 10) mm long, coarse, straight, erect, light rufous, outer bristles shorter and more slender; bristles basally united into distinct annulus 0.5 mm high, constricted above the top of the achene. Achene obovate, 3-4 mm long, 2 mm wide, densely sericeous with dirty white, straight hair up to 4 mm long.