Plant ID using leaves Flashcards
What are the 5 leaf types?
1) Simple
2) Compound
3) Awl-like
4) Scale-like
5)Needle-like
What is a simple leaf?
The position of the bud determines whether it is simple or compound
What is a compound leaf?
Compound leaves are made up of several leaflets
What is Awl-like leaf?
Junipers have both awl like leaves and scale leaves, generally sharp to the touch and usually found on conifers, shaped like awl
What is a scale-like leaf?
Foliage overlaps like shingles and are soft to touch (Ex: White cedar)
What is a needle-like leaf?
Can be found in bundles of 2,3,5, or arranged in clusters (Ex: Pine trees, yews, hemlocks and spruces)
What are the 3 leaf arrangements?
1) opposite
2) whorled
3) alternate
What is an opposite leaf arrangement?
Leaves are on same level of stem and across from one another
What is an alternate leaf arrangement?
The leaves alternate on the stem and are not across from one another
What is a whorled leaf arrangement?
Radiate from the same level of the stem, can have three or more leaves
What are 4 leaf venations?
1) Pinnate
2) Palmate
3) Dichotomous
4) Parallel
What is a pinnate leaf venation?
Prominent center vein with smaller veins extending to the outside of leaf- like a fishbone (Elm and Oak)
What is a Palmate venation?
Several main veins of equal size and extends from the base
What is a dichotomous venation?
Form a “Y” pattern near the apex, basal veins. (Ex: Ginko)
What is a parallel leaf vein?
Usually found on monocotyledons such as palms and grasses
