On Fri, 08 Apr 2005 03:39:23 GMT, "Carlos"
wrote:

Well, mine always has little ones spouting from the base of the trunk. I'll
try to look at the leaves as they mature. Only way is to compare huh? Not
sure what you mean by the sinuses and lobes though!

Here is a picture.
http://www.paisano.com/image/TexasOak.JPG

On this one, a Texas Oak for sure, the leaf is about 90 mm wide
overall and the width of leaf at the base of a sinus is about 20 mm,
or half of that for one side of the leaf gives a ratio of 45 mm to 10
mm - so less than one-forth. The depth of the sinus then is greater
than three-forth's. I may not be measuring that in the right place
but you can see the principle

On a Shumard's Oak the width of the leaf at the base of a sinus would
be much wider so the ratio would be more like one-third or even
one-half.

My soil is clay on top of rock on a slope in full sun, actually in SA.
I've been helping the soil the past few months with Medina Plus.

Anything growing on top of a rock needs good care. As long as you are
there taking care of it, the tree should do well. One way you can
tell is if the density of the green color starts decreasing near the
edge of veins. The picture above is a healthy tree with good color
near the veins. If you start to loose that the tree is running low on
nutrients and you need to start working again on the soil. I have a
Post Oak growing on marly lime soil and it is frequently low on
nutrients but it has survived OK.

Rusty Mase
Austin, Texas