Ray wrote:
I'm not talking just the velamen gone, I mean everything but that inner
core.


Oh. I guess I'm not picturing anything but the inner core being left
after the velamen is gone. I'll have to pay attention the next time I
repot something and look for the extra layer.

Steve

If you look at the cross section I posted on a.b.p.o, you can see the
velamen on the far outside (gray, spongy-looking area_, and the vascular
cylinder (almost white) in the middle.

My thought was that with the velamen gone, the inner part of the epidermis
can continue on, but once it's gone, the core is a goner.
--

Ray Barkalow - First Rays Orchids - www.firstrays.com
Plants, Supplies, Artwork, Books and Lots of Free Info!


"Steve" wrote in message
...
Ray wrote:
I'm not talking just the velamen gone, I mean everything but that inner
core.


Oh. I guess I'm not picturing anything but the inner core being left
after the velamen is gone. I'll have to pay attention the next time I
repot something and look for the extra layer.

Steve

Ray wrote:

If you look at the cross section I posted on a.b.p.o, you can see the
velamen on the far outside (gray, spongy-looking area_, and the vascular
cylinder (almost white) in the middle.

My thought was that with the velamen gone, the inner part of the epidermis
can continue on, but once it's gone, the core is a goner.

I guess, now that you point it out, I do know there are 3 major layers
in an orchid root. We've all seen a dead root that has the core and an
outer (velamen) layer intact but nothing left in between. I guess the
inner epidermis must decay faster than the other 2 parts.
Now, back to the former subject... I'm still not sure I've seen a root
with missing velamen but still covered with the inner epidermis. Maybe I
have when a root sticks to a surface and part of the velamen tears away
when I need to pull it free. Then it is missing on one side.

Steve