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27 Cards in this Set

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tiny hairs on the surface of leaf blades
trichomes
blade is attached to a stem like appendege called
petiole
if the blade doesnt have a petiole attaching it to the stem
sessile
leaf like structures at attachment point of stem
stipules
phyllotaxy
alternate, spiral, opposite, or whorled
1 leaf per node
spiral phyllotaxy
2 leaves per node
opposite phyllotaxy
3 or more leaves per node
whorled phyllotaxy
arrangement of leaves on a twig
phyllotaxy
veins branch randomly like a net
dicot, reticulate vinnation
two main dicot leaf venation patterns
pinnate and palmate venation
single blade not divided into leaflets
simple leaves
blade divided into smaller leaflets
compound leaves
leaflets originating at single point at the end of a petiole
palmately compound
leaflets come off a central extension of the petiole
pinnately compound
extention of a petiole
rachis
3 types of tissue in dicot leaves
epidermis, mesophyll, and veins
tightly packed parenchyma cells
palisade mesophyll
loosly packed parenchyma cells
spongy mesophyll
spongy mesophyll function:
store starch
monocot tissues
epidermis, buliform cells, 1 mesophyll layer, bundle sheaths
plants found in arid conditions
xerophytes
plants found in wet conditions, floating
hydrophytes
starshaped cells
astrosclerids
plants in normal conditions
mesophytes
in the main vein of the leaf, where is xylem and phloem found?
xylem- on top of leaf, phloem- on bottom
spongy mesophyll cells that have lots of air spaces in them are called
aerenchema cells