Re: D.chrysolepsis and U.volubilis

Carl Strohmenger (
Tue, 26 Jul 1994 06:22:21 -0400 (EDT)

On Mon, 25 Jul 1994, Barry Meyers-Rice wrote:

> The second note: Anyone out there growing _D.chrysolepsis_?
> .......
> Anyway the really interesting thing about the plant is that each petiole
> is twisted about 20--60 degrees (not bent, but rather spirally twisted
> along the petiole axis). As a result, each lamina is not held level w.r.t.
> the ground, but tilted. All the leaves are twisted the same way, resulting
> in a plant that is slightly spirally contorted as viewed from above, like a
> propeller (except not so dramatically). Very interesting.
> Barry
We see a similar taxonomic feature in Quercus laevis, Turkey Oak, in
central Florida. One of the key features differentiating this species
from some of the other oaks with similar leaf shape is the characteristic
twist to of the petiole that results in the plane of each leaf being
oriented vertical wrt the ground plane.