On Tue, 06 May 2003 16:07:28 GMT, "Cereoid-UR12"
wrote:

Monvillea spegazzinii, Weberocereus tunilla and Pterocereus foetidus, among
others, have square stems and they are genuine cactus. There are many
Cactaceae with square (quadrangular) stems.

Euphorbia horrida does not have a square stem.

Many Euphorbias have spines on specialized spine shields not arising
directly from the stem.

All Cactaceae have areoles (axillary buds filled with hairs not scales) but
so do Didiereaceae and Portulaca!

Please provide link to picture again.

.

http://tinyurl.com/b436

I shortened the URL.


_

- Charles
-
-does not play well with others