Annual herb, 5-20, sometimes up to 50 cm high. Main stem erect with ascending-erect branches, leafy, ± laxly tomentose. Leaves alternate, spreading, slender, mid-ribbed, linear, 3-30 mm long, 0.5-1.5 mm wide, glandular with stalked glands and sometimes laxly tomentose, obtuse. Capitula solitary, sessile, terminal. Involucre cyathiform, 3-8 mm wide. Involucral bracts 15-35, in 5-8 indistinct vertical rows, outer narrowly ovate, inner gradually longer and oblong with a spreading, scarious apical limb, entire or apically minutely serratulate, up to 11.5 mm long, up to 2 mm wide, dorsally laxly villose, inner dorsally gland-dotted, acute-acuminate. Receptacle flat, epaleate. Ray-florets 6-12. Tube cylindrical, 1.6-2.8 mm long, with scattered, subulate-triangular hairs. Lamina elliptic, 4-6 mm long, 1.5-2.3 mm wide, 4-7-veined, apically with a blunt point, actually 3-lobed, but with lateral lobes much reduced. Style 3.8-4.8 mm long; style-branches 1.2-2.1 mm long; stylopodium ± distinct. Achenes as in disc-florets, but with more hairs. Disc-florets 15-35, perfect. Corolla 4.2-5.9 mm long, 0.7-0.9 mm wide. Tube cylindrical, with scattered, subulate-triangular hairs on upper half. Limb narrowly cyathiform-campanulate; corolla lobes 0.7-1 mm long, with a stalked gland at apex. Style 4.2-6.2 mm long; style-branches 0.8-1.1 mm long, apically penicillate and truncate; stylopodium ± distinct. Anthers 1.7-2.5 mm long; tails c. 1/6 of the length of the anther. Achenes angular, linear, 4-6.5 mm long, 0.5-0.8 mm wide, with scattered subulate-triangular hairs mainly apically; pappus tubular-cup-shaped, somewhat unequal-sided, up to 1.5 mm long.
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Erect, closely leafy annual, up to 350 mm tall, branching above. Leaves linear, (5-)10-30 mm long, thinly to thickly felted, glandular-hairy, with revolute margins. Flowerheads solitary, sessile at branch tips, radiate, yellow, 10-20 mm diam.; inner involucral bracts with dry, recurved or spreading apiculus.
Thinly cobwebby annual or ?biennial to 35 cm. Leaves linear, gland-dotted, with revolute margins. Flower heads radiate, solitary and terminal, yellow with yellow rays.