Re: Some musings on current local tree diseases/Pinus radiata
- Subject: Re: Some musings on current local tree diseases/Pinus radiata
- From: P* B*
- Date: Tue, 15 Jan 2002 03:57:25 -0800
- Disposition-notification-to: "Phil Bunch"
----- Original Message -----
From: "anni jensen" <annij@value.net>
To: <cmanahan@value.net>
Cc: "medit-soc" <medit-plants@ucdavis.edu>
Sent: Monday, January 14, 2002 18:43
Subject: Re: Some musings on current local tree diseases/Pinus radiata
> I agree completely with mostr of David's post, but one small part is
not
> quite right. Quercus agrifolia is also the most common oak in
southern
> California. Quercus engelmanii is less drought-tolerant than Q.
agrifolia.
> It tends to cluster around sources of underground water, like fault
lines
> where soil, rock, and gravel strata are discontinuous and water
often flows
> near the surface. This happens along the Raymond Hill Fault in
Pasadena (I
> live and work on it). Q. engelmanii occurs all along the faultline
(or
> used to before Homo californicus became addicted to building right
on
> earthquake faults.)
>
> John MacGregor
> South Pasadena, CA 91030
> USDA zone 9 Sunset zones 21/23
In San Diego County Q. engelmannii occurs in a broad range of
microhabitats. It is not restricted to areas with water near the
surface.
Phil Bunch
