Leaves Flashcards
(23 cards)
Petiole
Stalk
Sometimes missing
Blade
Large flat part
Stipules
Leaf base
(Sometimes missing)
Falls early in woody plants
Simple leaf
Not divided into smaller segments
Compound leaf
Made up of leaflets
Pinnate
Cone like veins
Palmate
Veins come from the center and spread out.
Node
Where the leaves attach to the stem
Whorled
Multiple leaves per node usually opposite
Rosette
Tight spiral of leaves like a rose
Several highly compacted nodes
Alternate
Leaves come from separate nodes
Opposite
2 leaves per node usually on opposite sides.
Ovate
Egg shaped
1.5 times longer than wide
Lanceolate
Twice as long as wide
Still wide at the bottom and thin at the top
Oblong
Same width the whole length
Linear
Long and narrow like grass
Strap shaped
Ligulate
Shaped like a strap
Reminiscent of grass
Elliptic
Wide in the middle with a thin tip and base
Cordate
Heart shaped
Oblanceolate
Upside down lanceolate
Wider at the end narrower at the beginning
Obovate
Upside down Ovate
Narrow at bottom wide at top
Teeth
Shallow incisions
Lobes
Deeper incisions toward midrib; not separate leaflets