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Plant Terms and Diagrams
BUTTONBUSH FLOWER
Most of the terms in this guide are explained in the text right on each
species page (with the more technical term in brackets). However, the diagrams
below may help to highlight some of the more commonly used plant terms in
this guide.
Parts of a flower:
Anther
Petal
Filament
Sepal
(Outermost part
of flower,
typically green
and leaf-like)
Stigma
Style
Bract
(Specialized
modified leaves)
Inversely
egg
shaped
Lance-shaped
Oval
Obovate
Egg
shaped
Elliptical
Ovate
ALL ILLUSTRATIONS © JENNIFER MCKINNON
Common leaf shapes
Stigma
Style
Carpal
(Female reproductive organs)
Ovary
Leaf veins
Linear
Stamen
(Male reproductive organs)
Anther
Filament
Ovary
Serrate leaf edges
© SEAN BLANEY
Sepal
Petal
© MEGAN CROWLEY
Opposite, sessile leaves
© MEGAN CROWLEY
Linear, entire leaf
© MEGAN CROWLEY
Plant Terms and Diagrams
PINK COREOPSIS (WITH OPPOSITE LEAVES)
Alternate:
when the leaves
are alternately
arranged on
the stem.
x
Whorled:
when the leaves
are circularly arranged
around the stem.
Opposite:
when the leaves
are paired on
the stem.
ALL ILLUSTRATIONS © JENNIFER MCKINNON
Leaf Arrangements
Clasping
(surrounding the
leaf stalk)
Petiolate
(with a leaf stalk)
Leaf sheath
(part of leaf that wraps
around the stem, common
in grass-like plants)
Sessile
(without a
leaf stalk)
ALL ILLUSTRATIONS © JENNIFER MCKINNON
Leaf Attachments
Entire
(smooth)
Lobed
(larger divisions)
Serrate
(toothed)
ALL ILLUSTRATIONS © JENNIFER MCKINNON
Leaf edges (margins)
© ALAIN BELLIVEAU
Whorled leaves
Leaf
sheath
© SEAN BLANEY
Petiole
(leaf stalk)
Lobed leaf
© MEGAN CROWLEY
Alternate, clasping leaves
© JOHN HILTY
© ALAIN BELLIVEAU