Arrowsmithia styphelioides Dc.

Shrublet. Stem with fibers in the phloem, without pericyclic cambium and resin canals. Leaves alternate, sessile, ovate, mucronate, hairy and glandular-hairy; margin entire, flat to somewhat revolute. Capitula solitary, heterogamous, radiate. Involucral bracts cartilaginous, in several rows; stereome undivided. Receptacle flat, epaleate. Female florets radiate, pistillate, yellow, in one row, fewer than the disc-florets. Cypselas with 20 ribs. Pappus as in disc-florets. Disc-florets functionally male. Corolla yellow, basally with long hairs as well as glandular hairs; corolla lobes erect; veins reaching the apex of the lobes. Anthers ecalcarate, with short tails; endothecial tissue polarized; apical appendage acute, flat, as wide as the thecae. Pollen gnaphalioid; spines with a cavity. Style bifid; style-branches obtuse, dorsally with obtuse sweeping-hairs, not reaching the furcation; stigmatic surface basally separated but apically converging. Cypselas with 5 vascular bundles, glabrous or with scattered, elongated, not myxogenic, twin hairs, glandular-hairy. Pappus of a few, free, readily caducous, barbellate bristles in one row; basally without patent cilia; apical cells acute.