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ID: Thorny Tree at ASU

Posted by pteroceltis z5 Syracuse (My Page) on
Sat, Jun 25, 11 at 16:50

I was wondering if anyone could help me with an identification. I bumped into a very thorny tree with simple, glossy, variably-shaped leaves on the ASU Tempe Campus. More specifically, the tree is on the east end of Discovery Hall, just off the Cady Mall walking area. The leaves are alternate and mostly round, although some of the shoots bear leaves with some blunt lobing; some have notched apices. The bark is smooth and gray but the plant is still pretty young (10-15' tall). The leaves are very glossy. No signs of fruits or flowers. The thorns are about 3-4" long on average and are simple. I just graduated from ASU (plant biology) and this is the only plant on campus I haven't been able to ID yet. Any ideas?

Follow-Up Postings:

RE: ID: Thorny Tree at ASU

The ASU Botany department should have the names of all the trees on campus...they used to have signs.

BTW, have you found the Sapote tree on campus yet?

RE: ID: Thorny Tree at ASU

Indeed I have, if you mean Casimiroa edulis. ASU doesn't have a botany department, and their plant sciences have been steadily going downhill. They still have some great professors in plant bio but I've heard that a lot of good ones retire or leave and aren't being replaced. Pretty much the same is happening with the arboretum; a lot of plants listed online have died and not been replaced. In one case I found a healthy Bauhinia lunarioides which was recently removed for mysterious reasons. I noticed sadly that I was the only Plant Biology major listed in the commencement program.

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