Leaf Morphology

Question 1

What are the 3 common methods for Identification?

Answer 1

Keys, picture guides, and characterization

Question 2

Characterization

Answer 2

Focus on distinct morphological features and unique characters of a plant

Question 3

Classification

Answer 3

fitting plants into the basic 7 tier hierarchical system developed by Linnaeus
(broad) Kingdom>Phylum>Class>Order>Family>Genus>Species (narrow)

Question 4

Blade

Answer 4

Broad, expanded part of a leaf

Question 5

Petiole

Answer 5

Leaf stalk

Question 6

Stipule

Answer 6

one of a pair of leaf-like appendages often found at the base of the petiole

Question 7

Sissile Leaf

Answer 7

Leaf directly attached to the stem

Question 8

Name the 3 common types of leaf arrangement

Answer 8

Alternate, Opposite, and Whorled

Question 9

Alternate

Answer 9

one leaf borne per node; leaves spiral around twig (common)

Question 10

Opposite

Answer 10

two leaves per node; leaves opposite each other on twig

Question 11

Decussate

Answer 11

each adjacent pair of leaves is rotated about 90 degrees (specific type of opposite arrangement)

Question 12

Whorled

Answer 12

3 or more leaves per node (also know as verticillate) (least common)

Question 13

Dwarf Shoots

Answer 13

leaves crowded on lateral shoots. Less than an inch in length

Question 14

Pin Shoots

Answer 14

leaves clusters on short shoots from main branch, but longer. An inch or longer in length (willow oak)

Question 15

Simple Leaves

Answer 15

Undivided or uninterrupted leaf blade

Question 16

Simple Leave Types

Answer 16

Lobed and Pinnatifid

Question 17

Pinnatifid

Answer 17

Blade divided into lobes of which the sinus reaches nearly to the midrib.

Question 18

Compound leaves

Answer 18

leaf blade divided into segments

Question 19

What are the two leaf types

Answer 19

Simple and Compound

Question 20

What are the parts of a compound leaf?

Answer 20

Leaflet, petiolule, and rachis

Question 21

Leaflet

Answer 21

photosynthetic division of a compound leaf

Question 22

Petiolule

Answer 22

stalk of a leaflet

Question 23

Rachis

Answer 23

main axis of a compound leaf or inflorescence from which leaflets or flowers are borne

Question 24

Pinnately compound

Answer 24

compound leaf with leaflets arranged on opposite sides of one elongated axis

Question 25

Decompound

Answer 25

Term used for leaves more than once pinnately compound (bamboo)

Question 26

Palmately compound

Answer 26

compound leaf with all leaflets arranged at the apex of the petiole