Erigeron petrophilus Greene
Family: Asteraceae
Erigeron petrophilus image
Perennials, 10-20(-30) cm; taprooted, caudices woody, branches rhizomelike. Stems usually decumbent-ascending, sometimes nearly erect, sparsely to densely white-villous (hairs loose, thin, often crinkly) or sparsely hispido-pilose (hairs usually stiff, spreading, sometimes antrorsely ascending or appressed; var. viscidulus), usually densely minutely glandular at least distally, sometimes eglandular or obscurely glandular (var. viscidulus). Leaves cauline; blades narrowly oblong to oblanceolate, 10-25 × 1-5 mm, usually even-sized, margins entire, ciliate, faces sparsely to densely villous to hirsuto-villous, usually densely minutely glandular, sometimes eglandular or obscurely glandular (var. viscidulus). Heads (discoid) (1-)2-5(-10) in corymbiform arrays. Involucres 5.5-7(-8) × 8-12 mm. Phyllaries in 3-5 series (sometimes purplish apically), usually glabrous, sometimes with spreading hairs, densely glandular. Ray (pistillate) florets 0. Disc corollas 4-6 mm (throats slightly indurate, not inflated). Cypselae (2-)2.5-3 mm, 2-nerved, glabrous; pappi: outer of setae, inner of 22-30(-35) bristles.