Pteronia acuta Muschl.

A shrub; branchlets appressed-woolly)-pubescent with white or silvery hairs. Leaves opposite, connate at the base, linear, acute or subobtuse, trigonous in section, 4-10 mm long, about l-l-75 mm across the flat upper surface, thick, woolly-pubescent with silvery hairs. Heads terminal, solitary, campanulate-obconic, 1 cm long and about the same in diameter, several-flowered. Involucral bracts about 6-seriate, bright greenish yellow, the outermost linear-lanceolate, about 4 mm long, the innermost linear-oblong, 8 mm long, all with narrowly membranous margins, woolly-villous outside, and acutely cuspidate-acuminate. Receptacle small. Corolla yellow, 6 mm long; tube strongly ribbed for T5 mm at the base, upper part cylindric and slightly contracted to the base of the lobes, glabrous; lobes linear, subacute, '2 mm long, finely pubescent outside. Achenes obconic, 3 mm long, densely appressed-villous. Pappus 7 mm long, straw-coloured.