Indiana Phenology

Celtis occidentalis

Species Category Name: Woody

Celtis occidentalis produces small hard berries which are enjoyed by birds and other wildlife. It’s flowers are wind pollinated. It’s leaves are attractive to the caterpillars of many butterflies. The bark of mmature trees is distinctively warty and can be described as corky.

Tuliptree
Tulip tree close up
tree with colored leaves
Tulip tree

Why observe?

Liriodendron tulipifera is Indiana’s state tree.

The tulip poplar is planted for reforestation purposes because of its rapid growth and the commercial importance of its wood, and is often planted as an ornamental.

This species has some wildlife value. The fruits provide food for squirrels in the late fall and winter months, and the white-tailed deer often browse on the twigs.

How to Identify

LEAVES 2-5 inches long, ovate, coarsely toothed from midleaf to tip, with mostly uneven leaf bases


TWIGS Green to dark reddish-gray and smooth. Young twigs are usually hairy.


FLOWERS About ¼ inch across and predominately yellowish-green


FRUIT Fleshy and berry-like, changing from green to orange-red


AGED BARK Grayish and generally smooth with characteristic corky warts or ridges


MATURE HEIGHT 40-100 feet


MATURE TRUNK 1-3 feet

Phenophase Calendars