Yes, those two species are remarkably similar. We have them both here in
NE Oregon, but so far Deschampsia danthonioides has been in such small
quantities and limited areas compared to Ventenata that it is not an issue
with the remote sensing. We are only just beginning the remote sensing
project, so we don't know what other, more abundant annual grasses may be
problematic. How would you describe the weediness of Ventenata in BC?
Susan M. Geer, Botanist
USFS Pacific Northwest Research Station
1401 Gekeler Lane
La Grande, OR 97850
541-962-6518
[EMAIL PROTECTED]
"Adolf Ceska"
<[EMAIL PROTECTED]
> To
"'Susan Geer'" <[EMAIL PROTECTED]>,
01/05/2007 11:15 <[email protected]>
AM cc
Subject
RE: distribution and weediness of
Ventenata
Remote sensing of Ventenata dubia seems to me like a great project. I have
great difficulties to tell Ventenata dubia from Deschampsia danthonioides
when I view them from distance more than 30 cm. Both species grow in
similar
habitats and they may have similar albedo. The ideal remote sensing
technique would be one that would allow you to see the typical awns on
Ventenata dubia that are about 1-3 mm long.
Good luck,
Adolf Ceska, Victoria, BC, Canada
