"swim learning" wrote in message
om...
(swim learning) wrote in message
. com...
Please identify the tree whose eight photos, taken in September, are
shown he http://myturl.com/0015j

If the web-page is not accessible, please go to:
http://photos.yahoo.com/shahswim

and select the "plant-25" album.

The leaves are simply toothed and opposite. The twig has a pair of
opposite leaves, then a second pair perpendicular to the first, then a
third pair aligned as the first pair and so on. What is such an
arrangement named?

Opposite-decussate. That's generally true of most plants with opposite
leaves.

The flat, long fruit, shown in pic-2, looks somewhat like a smaller
version of green-ash fruit.

Thank you.

I am adding the newsgroup sci/bio/botany to the thread. Toad and Pam
are suggesting the tree is a Fraxinus Oxycarpa (Raywood Ash). Pictures
of Raywood Ash show the leaf-pairs in a single plane

More likely, you're looking at the leaflets making up a compound leaf
typical of most ash species. Yours has simple leaves.

while the tree in
my photos have adjacent leaf-pairs perpendicular to each other. Please
clarify.

The fruits in your photo very clearly seem to be those of an ash [genus
Fraxinus], but nearly all ashes have compound leaves divided into leaflets.

Your tree, on the other hand, seems to have simple, toothed leaves. I'd
thought that the only simple-leaved ash species was _Fraxinus anomala_
from the southwest, but its foliage appears rather different from yours:

http://www.suu.edu/faculty/martin/as...leleafash.html

However,
http://ohioline.osu.edu/b700/b700_63.html

says that one commonly cultivated form of _Fraxinus excelsior_ [European
Ash]
has simple leaves. That's my best guess as to the identity of your mystery
tree.

cheers