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Keys
Vascular plant groups
Club mosses
Ferns
Vegetative key to families
Gymnosperms
Flowering plants
Genera
Families
Pterostylis R.Br.
Dorsal
sepal
and
lateral
petals
fused
to form a hood (Fig. 44)
Pterostylis
consider the other alternative
Basal leaves in a cluster or rosette encircling the base of the stem, always present at flowering time.
Cauline
leaves reduced to sheathing bracts or well developed and scattered
consider the other alternative
Stem leaves reduced to sheathing bracts
consider the other alternative
Flower solitary
choose this alternative
reject this alternative
Labellum
2-fid
. Stem bracts 1–2
choose this alternative
reject this alternative
Labellum
entire
. Stem bracts 2–3