Prenanthes sagittata
arrow-leaf rattlesnake-root, arrowleaf snakeroot
erect, greenish and mottled purplish, ± glabrous or proximally glabrate, distally glabrous.
proximal present at flowering; petiolate (petioles narrowly winged, sometimes lobed, 5–15 cm);
blades ovate or deltate, 3–10 × 1.5–6 cm, thin, bases hastate to truncate or rounded, sometimes shallowly, palmately lobed, ultimate margins irregularly dentate, faces glabrous;
distal reduced.
narrowly campanulate (rounded), 7–13 × 5–8 mm.
10–19;
corollas white, 9–15 mm.
7–12, green to tan, apices dark, linear-lanceolate, 8–12 mm, margins narrowly scarious, (apices sparsely ciliate), faces glabrous.
5–7, green, subulate to narrowly lanceolate bractlets 3–8 mm (longest 2/3 lengths of phyllaries), glabrous.
in narrow, elongate paniculiform or racemiform arrays.
brown, fusiform to oblanceoloid, subterete or angled, 5 mm, indistinctly 7–10-ribbed;
pappi pale yellow, 5–6 mm.
= 16.
Prenanthes sagittata
Prenanthes sagittata is similar to P. alata; it differs in its somewhat smaller stature, heads in narrower and more elongate arrays, and longer calyculi. The ranges of the two species do not overlap.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
BC
PNW Herbaria
WildflowerSearch
iNaturalist
USDA Plants Database
