Venation Flashcards
Arrangement of veins in a leaf.
Venation
-The vascular structure that transports water, nutrients, & sugars through the leaf.
- Supports the leaf blade by allowing it to maintain its flat shape and also facilitates gas exchange.
Veins
Types of venation
- Netted venation (Reticulate Venation)
subtypes: Pinnate & Palmate - Parallel venation
- Dichotomous venation (fan-shaped leaf)
1 or few main veins with smaller veins branching out, forming a mesh-like pattern.
Netted venation (Reticulate Venation)
1 large central vein (midrib), with smaller veins branching off.
Pinnate
2 or more veins radiating from a single point.
Dicots (Ex: maple, ivy, & geraniums)
Palmate
Veins run parallel from base to tip
Monocots (Ex: grasses & cereal grains)
Parallel venation
No midrib or large veins; individual veins fork repeatedly from base to edges.
Dichotomous venation (fan-shaped leaf)