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Venation

"A Tree's Lifeblood"

 The arrangement of veins in a leaf is called the venation pattern. Veins bring nutrients and liquid to leaf cells. 

PARALLEL - The veins run parallel except where they meet at the tip and the base.

PINNATE - Secondary veins are spaced along a central midvein. Pinnate refers to "ladderlike."

PALMATE - Several primary veins diverge from a point. Palmate leaves can vary in the number of primary veins, usually 3 or more.

DICHOTOMOUS -  Veins fork by twos extending from a common point forming a “y” pattern fanning out. Ginkgo biloba is the only species exhibiting dichotomous venation.

Click below to enlarge

Multiple content questions and answers (examples):

Q: How many different trees are in the arboretum?

A: We have almost 200 different accessioned species of trees, woody shrubs and vines.

Q: Can I tell the difference between trees?

A: Yes, we have a t least one tree of each species is signed for identification with the common name and Latin name.

Q: How old are the trees?

A: Our Native trees like the cottonwood can be over 75 years old. Trees planted for the arboretum began in the early 90's.

Q: Are the trees in a particular location.

A: No, the arboretum covers the entire Zoo grounds which is 70 acres. The trees are everywhere !

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