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See list of 6 species in this genus

Leaf blade outline has been used for identification despite the fact it is unreliable for our species occurring in temperate forests and woodlands. Specimens based solely on vegetative collections should not be considered as adequately vouchered. Pappus bristles frequently break off and the bristle fragments can be found about the involucres. These bristles are sometimes misinterpreted as hairs on the involucres, leading to misidentification. The pappus bristles of Nabalus are minutely barbellate, the involucral bract hairs are smooth. Reference: Bogler (2006c).

  • 1a. Involucral bracts sparsely to densely long-hirsute (caution: sometimes only a few hairs are present on the involucre of N. serpentarius, look near the base of the inner involucral bracts) [Figs. 434,435]
    • 2a. Lower leaf blades simple, broad-oblanceolate to obovate, the middle and upper blades clasping; capitulescence tall and narrow, raceme-like; rays pink to purple (infrequently white); capitula with (9–) 11–29 flowers [Fig. 434]
    • 2b. Lower leaf blades pinnately or palmately lobed or simple and then ovate to elliptic, the middle and upper blades short-petioled or sessile, but not clasping; capitulescence broader, corymb- or panicle-like; rays yellow to yellow-white; capitula with 8–14 flowers [Fig. 435]
  • 1b. Involucral bracts glabrous except for minute, apical cilia [Fig. 436]

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 Show photos of:   Each photo represents one species in this genus.