Petrorhagia dubia (Raf.) G.López & Romo / Infraspecifics: Petrorhagia dubia ssp. dubia ̸ Heterotypic Synonyms: Petrorhagia velutina (Guss.) P.W.Ball & Heywood, it is an annual herb, erect, up to 50 cm tall, mostly unbranched, with middle internodes of stern densely glandular-hairy, or pubescent, sometimes entirely glabrous. Lower leaves oblanceolate-spathulate to oblong-linear, with ± scabrous margins, upper ones linear, connate and scarious at the base, leaf sheath at least twice as long as broad, 3-costate, smooth margined, all up to 50 x 4-5 mm. acute or mucronulate. Flowers pink or purplish. shortly pedicellate. in 2-3-f1owes, terminal ± capitate clusters; outer bracts of involucre many, brown scarious, enclosing the calyx ovate to obovate, largest 7-12 x 4.5-8.5 mm, acute or mocronate. Calyx tubular, 8-12 (-14) mm long, whitish membranous, glabrous, costae 3-nerved; teeth short, oblong, c. 1 mm long, obtuse. Petals distinctly clawed. 10-16 mm long, claw exserted, limb obcordate or occasionally 2-fid. up to c. 2.5 mm broad. Capsule narrowly ovoid-oblong, 6-8 mm long, 3-4 mm broad, shortly stipitate. Seeds black, boat-shaped, 1-1.3 x 0.7-0.8 mm, strongly tuberculate or cylindrical-papillate.
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