Herb 0.6-0.9 m tall, rather slender (possibly annual); stems reddish, with appressed crispate hairs.. Leaves alternate, sessile, narrowly elliptic, 5-7.5 cm long, 0.3-0.6 cm wide, base attenuate, margins remotely serrate, apex obtuse, silvery green, very shortly strigose above, thinly appressed-crispate beneath, densely glandular.. Capitula in lax terminal and upper axillary compound corymbiform cymes; stalks of individual capitula slender, ascending-strigose; involucre hemispherical, 3-4 mm long and in diameter; phyllaries 3-seriate, ovate to elliptic, acute, pubescent, purplish at the apex, the inner with prominent erose-fimbriate membranous margins, glabrous, purplish at the apex, 4 mm long.. Florets shortly exserted; corolla violet-blue, 4.5 mm long, lobes 2 mm long.. Achenes 1.4 mm long, with 5 broadly rounded ribs, crowned by slight distal rim surrounding a depression with the persistent style base; pappus 0.
Home