Phymaspermum leptophyllum (Dc.) Benth. & Hook. ex B.D.Jacks.

Single-stemmed, leafy shrub, 0.5-1.6 m high. Stem much-branched; branches erect to spreading, silvery pubescent; fascicles sometimes present in leaf axils. Leaves alternate, spreading to erect, 6.0-25.0 x 1.1-2.0 mm, linear, mucronate, revolute, entire to trifid, without petiole-like base, sometimes with secondary basal lobes, silver hairs on both surfaces, fleshy to leathery; basal swelling present, continuous with stem ribs; lobes 2-3, 2.0-7.0 x 1.0 mm, linear, mucronate. Capitula radiate, heterogamous, terminal, solitary, with 0-3 additional capitula from leaf axils below, pedunculate; peduncles 15-95 mm long, silvery pubescent. Involucre 5.0-6.0 x 6.0-9.0 mm, hemispherical, rarely tapering at the base; involucral bracts 4-seriate, tightly arranged, margins and apices scarious, membranous apices of all bracts 0.5-1.8 mm long, villous silvery hairs, brown margins sometimes present, median resin canals present; outer bracts triangular to lanceolate, 3.3-3.4 mm long, acute; middle bracts lanceolate to oblong, 4.3-4.5 mm long, acute; inner bracts oblong, 5.7-6.2 mm long, acute to obtuse; innermost bracts oblong, 6.5-7.0 mm long, rounded. Receptacle convex; paleae in marginal series, narrowly oblong, 5.2-6.0 mm long, rounded, scarious. Ray florets 10-22; tube 1.1-4.2 mm long; limb obovate, 10.0-12.0 x 3.0-4.3 mm, apically 3-dentate, rarely entire or 2-dentate, white to mauve. Disc florets up to 100, without resin canals; corolla 3.5-4.0 mm long, with only glandular trichomes, yellow; tube 1.6-1.7 mm long; limb campanulate, 1.7 mm long (excluding lobes); lobes spreading, 0.7-0.8 mm long, triangular. Anthers 4.3-6.5 mm long (including apical appendage); apical appendage ovate. Style 2.8-3.6 mm long (excluding branches); branches 1.01.3 mm long. Cypselas 2.5 x 0.8 mm, oblong to obovate, 10-ribbed, apical rim absent, inconspicuous glandular trichomes present, dense, appearing sessile on ribs, mucilaginous when soaked, discontinuous resin canals in ribs absent. Flowering is from May to November.