• 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?

fossil_a

One of the most common fossils found in the Florissant Formation include leaves from Fagopsis, which is an extinct member of the beech family. This image is protected by copyright. All rights reserved. To learn