Flora of North America species comparison

usually erect, hairy, not viscid.

stipules persistent, filiform, sometimes absent;

blade ovate to ovate-lanceolate, not dissected or parted, base cordate, margins coarsely crenate.

axillary, solitary flowers or 2–4-flowered clusters;

involucel absent.

calyx not accrescent, not inflated, ca. 1/2-divided, shorter than mature fruit, lobes unribbed, lanceolate to ovate;

corolla blue-violet [bluish lavender, white, or yellow];

staminal column included;

style 8–10[–16]-branched;

stigmas capitate.

schizocarps, erect or semipendent, inflated, disciform, prominently lobed, papery, minutely tomentose;

mericarps 8–10[–16], 2-celled, without dorsal spur, apex rounded, proximal cell indehiscent, enclosing 1 seed (each seed covered by endoglossum), distal cell dehiscent, empty (by ovule abortion), unwinged.

1 per mericarp, subglabrous to sparsely hairy.

= 16.