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Keys
Vascular plant groups
Club mosses
Ferns
Vegetative key to families
Gymnosperms
Flowering plants
Genera
Families
Salicaceae >
Leaves
entire
or distantly angular (includes Flacourtiaceae)
Salicaceae
consider the other alternative
Petals and/or sepals absent,
inflorescence
a
catkin
. Fruit a
capsule
consider the other alternative
Leaves broad-elliptic,
ovate
, triangular or rhombic; usually more than 5 cm wide. Flowers with
disc
shaped
nectary
Populus
consider the other alternative
Leaves 4–8 cm long,
glabrous
, closely toothed. Catkins 5–7 cm long.
Capsule
not seen. Spreading from suckers. Introd. from Eurasia
Populus nigra