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Keys
Vascular plant groups
Club mosses
Ferns
Vegetative key to families
Gymnosperms
Flowering plants
Genera
Families
Asteraceae
Flowers grouped into heads
Asteraceae
consider the other alternative
Burr
not formed around the fruits at maturity
choose this alternative
reject this alternative
Florets all tubular or
filiform
and tubular (Fig. 41) or; florets with
ligule
present but the
ligule
less than 3mm
choose this alternative
reject this alternative
Florets
ligulate
and tubular, or all
ligulate
;
ligule
more than 3 mm long