Re: Some musings on current local tree diseases/Pinus radiata
- Subject: Re: Some musings on current local tree diseases/Pinus radiata
- From: J* D*
- Date: Mon, 14 Jan 2002 17:58:02 -0800 (PST)
Count me as one of the millions of Californians who's
been to Pasadena many times and never seen a Quercus
engelmanniii. So sad. It's the only species in its
section of the genus native to California. Some day,
before it's too late, I'll have to make a special trip
to the conservation area in Riverside County where
they still grow.
-Jason Dewees
San Francisco
--- John MacGregor <jonivy@earthlink.net> wrote:
> > David Feix wrote:
> >
> >> A few of the "facts" quoted in the article are
> also
> >> not quite right. Coast Live Oaks are by no means
> >> rare, they are still abundant along most of the
> >> coastal ranges, and one of the most common oaks
> in
> >> California. There are several other Live Oak
> species
> >> such as Q. chrysolepis in inland areas and Q.
> >> engelmannii in southern California which tend to
> >> replace Q. agrifolia, the most common species in
> the
> >> San Francisco Bay Area.
> >
> > I agree completely with most 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.)
>
> I meant to add, Q. engelmanii has now virtually
> taken on the classification
> of a rare endemic--certainly in the more intensely
> developed areas of
> southern California.
>
> John MacGregor
> South Pasadena, CA 91030
> USDA zone 9 Sunset zones 21/23
>
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