August 1959 Journal 172 Apr 1 Weba, Siskiyou Co., Calif. Hwy 99 I wonder about this area quite a bit. It appears as though the highway 99 cuts across an ecotone area at the base of the Klamath Mountains with its Transition and the more arid Great Basin type to the east. Although I can't be sure it appears that extensive areas of Quercus kelloggii in nearly pure stands now fringe well into the Great Basin areas -- or rather into the broad Ceanothus patches. Black Mt. has ponderosa at summit as well as area about the state line which is transition. What happened? [if anything] has the pine been cut & burnt out leaving extensive areas of Ceanothus - Quercus ? Or are they the arid fringe of the Transition? I have noticed areas where there are trees about buildings -- I can't tell whether they are black walnut or locust trees -- I believe they are the latter -- also most of these trees have a peculiar yellow ochre called algae growing on its deeply furrowed bark. If these are locust trees then the algae is some- what characteristic. Specimen Locality Weed, Siskiyou Co. Shasta River.