Gamochaeta spp. Family: Asteraceae Project: Southwest
Biodiversity Consortium Annuals, biennials, or perennials,
(1-)5-65 cm; taprooted or fibrous-rooted [subrhizomatous]. Stems
1+, usually erect, sometimes decumbent-ascending. Leaves basal
and cauline; alternate; sessile; blades mostly linear to
oblanceolate or spatulate, bases cuneate to ± cordate, margins
entire, sometimes sinuate, abaxial faces mostly white or gray
and tomentose or pannose-tomentose, adaxial green and
glabrescent or glabrous, or grayish and arachnose, loosely
tomentose, or subpannose. Heads disciform, usually in glomerules
borne in continuous or interrupted, usually spiciform, sometimes
paniculiform, arrays (reduced to terminal glomerules in
depauperate individuals). Involucres narrowly to broadly
campanulate, 2.5-5 mm. Phyllaries in 3-7 series, unequal, mostly
brownish to stramineous, sometimes purplish, hyaline, often
shiny, distally chartaceous to scarious, eglandular. Receptacles
flat (concave in fruit), glabrous, epaleate. Pistillate