Adenocaulon spp. Family: Asteraceae Project: Southwest
Biodiversity Consortium Perennials (perhaps flowering first
year, usually rhizomatous), (10-)30-60(-100+) cm (aerial stems
usually proximally tomentose and distally stipitate-glandular).
Leaves basal and cauline; petiolate (proximal) or sessile
(distal); blades ovate to ± triangular [suborbiculate], bases
mostly truncate to cordate or hastate, margins coarsely dentate
or lobulate to denticulate or entire, abaxial faces tomentose,
adaxial faces glabrate (distalmost leaves often linear or
scalelike). Heads disciform, borne in open paniculiform arrays.
Involucres cuplike to saucer-shaped (inconspicuous), 4-8+ mm
diam. Phyllaries in 1-2 series, ovate to oblong, ± equal
(reflexed in fruit), apices obtuse. Receptacles convex, smooth,
glabrous, epaleate. Florets: outer 3-7 florets pistillate,
corollas white or ochroleucous, obscurely zygomorphic (±
2-lipped; staminodes 4-5, minute; style branches relatively
short); inner 2-10 florets functionally staminate, coro