Flora of the Southeastern United States
2022 Edition

Colors

Data mode

Key to Dipsacus

1 Principal (lower) stem leaves laciniate-pinnatifid, cut at least halfway to the midrib; stems to 3 (-4) m tall
1 Principal (lower) stem leaves entire or toothed; stems to 2 (-3) m tall.
..2 Bracts on the receptacle 7-30 mm long, with straight apical spines, these stiff but flexible; bracts of the involucre 1-13 cm long, curved upward
..2 Bracts on the receptacle 12-14 mm long, with recurved apical spines, these rigid; bracts of the involucre 1-5 cm long, spreading more or less horizontally