Plant Anatomy Flashcards
bud scales
modded leaves to protect dormant buds
floral bracts
protect inflorescence during development
sepals
warding off predators
cotyledons
first leaves produced by germinating seeds
cuticle
outermost layer that prevents water loss
epidermis
layer of cells - provides inner tissue protection
stoma
open aperture in epidermis surrounded by 2 hards
palisade parenchyma
directly below the upper epidermis; hold 70-80% of leaf chloroplast
spongy mesophyll
contains large air spaces; used for gas exhange
veins
contains vascular tissue within the stem
simple leaf
blade of leaf occurs within one unit
tip
terminal point of leaf
blade
flattened green, expanded of leaf
margin
edge of leaf
midrib
most prominent central vein of leaf
lateral veins
secondary veins in leaf
petiole
leaf stalk
stipules
leaf-like appendages at the base of the petiole on some leaves
compound leaf
blade of leaf divided into leaflets
leaflet
second leaf of compound leaf
rachis
extension of petiole that bears leaflets
petiolule
leaflet stalk
petiole
leaf stalk
alternate arrangement
one leaf per node
opposite arrangement
2 leaves (a pair) attached per node
whorled arrangement
3 or more leaves per node
pinnate
feather-like, net venation extended from the central midrib
palmate
finger-like venation w/ several major veins diverging from the union of petiole and leaf blade
parallel
main veins parallel to axis of leaf
pinnately
leaflets coming from both sides of rachis
palmately
leaflets arising from same location at top of petiole
