Perralderia garamantum Asch., it is a robust. suffrutcscent perennial, up to 25-50 (-80) cm tall; stems much branched at the base, lower parts thinly and upper parts densely hairy and interpressed with glandular hairs, striate, darkish-yellow or greenish in colour. Leaves 2-4 (-5) cm long, hairy glandular. Lower and mid cauline leaves 2-pinnatisect. Upper cauline leaves 1 pinnatisect; all lobes linear or ± terete, obtuse. Capitula 15-25 mm in diameter (exclude. involucre), showy, yellow, heterogamous, radiate, solitary terminal. Peduncles 1-3 (4) cm long, slender, densely villous, glandular. Involucre broadly campanulate, 30-40 mm in diam., villous. Involucral bracts 4-rowed. Outermost involucral bracts 17-20 x 0.25-0.5 mm, sub terete, herbaceo-foliaceous, acute, covered with soft. dense hairs and sub sessile glands, erecto-patent. Innermost involucral bracts up to 9 mm long. flat. coriaceous with narrow, scarious margins, acuminate, hairy. Peripheral florets ligulate, 1-rowed, female, not exceeding the involucre; corolla 13-15 mm long. (include, basal tube 4.5-5 mm), linear-oblong, erect, unequally 3-toothed. Disc florets corolla 7-R mm. obconical, 5-toothed; teeth narrowly ovate, acute, up to 1.25 mm long. Cypsela 2-2.5 (-3) mm long, cylindrical, 10 ribbed; base with a short, annular, oblique callus; apex sparsely hairy below the pappus. Pappus 2-rowed; outer row coronate, of short scales; scales c. 0.25 mm long, linear, acute, free up to the base; inner row of many setae; setae scabrid, fragile, unequal, up to 7 mm long.
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