lab 5 Flashcards
leaf lamina
everything branching from stem
sessile vs petiole
sessile = no stalk attaching leaf to stem petiole = attaches leaf to stem
characteristics of true leaves
- complex vasculature
- leaf gap
- lateral shoot bud or axillary bud (everything distal to this bud counts as one leaf)
leaf complexity
simple vs compound
leaf arrangement
pinnate vs palmate
opposite vs alternate
leaf venation
parallel vs netted
leaf anatomy top to bottom
cuticle with stomata/guard cells epidermis palisade mesophyll --> light absorption spongy mesophyll --> gas exchange vascular tissue
mesomorphic plants
adapted to moist environments
- single layer epidermis with thin cuticle
- epidermis is thicker than hydromorphic
hydromorphic plants
adapted to wet environments
- single layer epidermis
- no cuticle
- vast spongy layer for buoyancy
xeromorphic plants
adapted to dry environments
-super thick epidermis and cuticle
tricones
stuff in stomata that protect from water loss and predation
syringia
mesomorphic
lilac
Nymphea
hydromorphic
water lily
sclerid cells = lignified for support
stomata only on upper epidermis bc that side’s exposed
nerium
xeromorphic
stomatal crypt = creates humid environment to prevent loss of water vapor
Pinus
xeromorphic
- small “leaves” (pine needles) prevent water loss
- resin ducts carry protective resin substance
- endodermis around vascular bundles w/ suberin (called casparian strips –> regulate water mvmnt)