Leaf Morphology

Question 1

Whole leaf or leaflet

Answer 1

Blade

Question 2

Stem

Answer 2

Petiole

Question 3

Small leaf-like structures that may/may not be found at base of petiole.

Answer 3

Stipules

Question 4

Leaves may be called:

Answer 4

Petiolate or sessile

Question 5

Simple leaf

Answer 5

Each single blade has a bud in its axil and is a true leaf

Question 6

Compound leaf

Answer 6

Composed of 2 or more leaflets. These may be distinguished from true leaves by the absence of a bud in the axil.

Question 7

Palmately lobed leaf

Answer 7

All coming from the same point.

Question 8

Pinnately lobed leaf

Answer 8

Lobes all join to a central line, not a single point.

Question 9

Trifoliate leaf

Answer 9

3-lobed palmate arrangement

Question 10

Bipinnate

Answer 10

Lobes join to a number of branches from a central line.

Question 11

Opposite leaf arrangement

Answer 11

2 at each node

Question 12

Decussate leaf arrangement

Answer 12

2 at each node, placed at right angles to pair below

Question 13

Alternate leaf arrangement

Answer 13

1 leaf attached at each node; the location of the node on the stem usually follows a spiral

Question 14

Whorled leaf arrangement

Answer 14

3 or more at each node

Question 15

Basal rosette leaf arrangement

Answer 15

No stem; connect to base of plant

Question 16

Leaf Morphology Matching

Answer 16

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