Prenanthes trifoliolata (Cass.) Fernald
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Authority
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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Family
Asteraceae
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Scientific Name
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Description
Species Description - Stem stout, 4.5-12+ dm, glabrous; lvs glabrous above, paler and sometimes a little hairy beneath, highly variable in size and shape, the lower long- petioled, pinnately or palmately few-lobed, usually rather deeply so, or trifoliolate and again cleft, varying to occasionally hastate or merely toothed, the middle and upper ones progressively smaller, less petiolate, and less cut; infl elongate-paniculiform; heads nodding; invol 10-14 mm, with (7)8(9) principal bracts, these glabrous, often purplish, generally provided with minute, white, waxy-appearing papillae (often barely visible at 10×) and sometimes also black-spotted (as in no. 4 [Prenanthes serpentaria Pursh); reduced outer bracts relatively short and broad, seldom over 2(2.5) mm or more than 2(2.5) times as long as wide; fls (9)10-12(13), white to ochroleucous or chloroleucous or grayish, seldom pale lavender; pappus stramineous or pale brown; 2n=16. Woods, especially in sandy soil; Nf. to Md. and Pa., and s. along the coast to N.C., and in the mts. to N.C., Tenn., and n. Ga. Aug., Sept. An apparent hybrid with no. 1, found in Me., N.S., and N.B., is P. ×mainensis A. Gray.
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Common Names
gall-of-the-earth