• Massive petrified redwood stumps

    Florissant Fossil Beds

    National Monument Colorado

Identification (Unit 4) - Vein Types

Pinnate - Leaf has one midvein or primary vein

  • Craspedodromous - secondary veins reach the margin.
 
Veins pinnate - craspedodromous
 
  • Camptodromous - secondary veins do not reach the margin.
 
veins pinnate camptodromous
 
  • Acrodromous - three or more primaries or sub-primaries running towards the apex.
 
Acrodromous veins
 

Palmate - Leaf has several primary veins.

  • Actinodromous - three or more primary midveins diverging from a single point in a palmate leaf.
 
Palmate veins actinodromous marginal
 
Palmate veins - actinodromous
 

Did You Know?

FLFO_bowfin fish

Fish are the most abundant vertebrates at the Florissant fossil beds, and the bowfin is the most primitive fish found here. The modern bowfin is considered a “living fossil” and is found in freshwater bodies of eastern North America.This image is protected by copyright. All rights reserved. To learn More...