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Keys
Vascular plant groups
Club mosses
Ferns
Vegetative key to families
Gymnosperms
Flowering plants
Genera
Families
Rubiaceae
Leaves apparently whorled or
opposite
with
interpetiolar
stipules
Rubiaceae
consider the other alternative
Flowers not united with each other
consider the other alternative
Herbs
consider the other alternative
Stipules much smaller than the leaves
consider the other alternative
Stipules
entire
choose this alternative
reject this alternative
Leaves
ovate
to
orbicular
Nertera
choose this alternative
reject this alternative
Leaves
linear
to narrow-elliptic
Galium