Aromatic, viscid, much branched shrub, 0.3-1.5 m tall. Stem thick, terete, leafy throughout, dividing into flower-bearing peduncles above. Leaves alternate, sessile, pinnate, minutely villous and ciliate ±50 mm long; pinnae oblong, irregularly serrate, somewhat obtuse, diminishing in size. Capitula radiate, pedunculate. Peduncle solitary. Involucre campanulate, up to 10 mm long. Involucral bracts in 2-series, more-or-less equal, thick, acute; outer 3.5-4.0 x 1 mm; inner 4.0-5.0 x 1 mm Ray florets ±18, female, fertile, strap-shaped, blue, mauve; corolla limb up to 9 x 3 mm, elliptic; corolla tube 2.8-3.0 mm long, glandular, cylindric. Style up to 3 mm long, linear, branched, style branches 2.2 mm long, sub-acute. Ovary up to 2.1 mm long, glabrous, obovate in outline. Disc florets functionally male, yellow, 5-lobed; lobes ovate, 0.2 mm long; corolla tube very hairy. Style 3.5-4.0 mm long, branched, style branches 0.2 mm long, linear with pollen sweeping hairs, which cover the style below the point of bifurcation for the same length as that of the branches. Anthers minutely caudate, linear with ovate apical appendages. Ovary up to 2 mm long. Cypselae 3.0-3.5 mm long, glabrous, 3-ribbed, narrowly obovate and the surface is rugose and papillate.
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Shrub or perennial herb, 0.3-1.5 m high; minutely velvety. Leaves alternate, petiolate; blade ovate in outline, up to 40 x 20 mm, pinnatipartite, lobes oblong, toothed, serratures blunt or subacute, callous-tipped. Heads radiate, terminal, solitary or few together, pedunculate. Involucral bracts biseriate, all ± the same length, very narrowly ovate, apices acuminate. Flowers: ray florets female, fertile, blue or purplish; disc florets functionally male, yellow; Dec.-Jun. Fruit with cypsela narrowly obovate, somewhat 3-angled. Pappus absent.
Perennial shrub or herb, 0.3-1.5 m high, minutely velvety. Leaves pinnatipartite, lobes oblong, toothed, serratures blunt or subacute, callous-tipped. Flowering time Sept.-June.
Like G. bipinnatum but leaves hairy and glandular, lobes not finely dissected.