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Jepson Field Book volume 28_46 | University and Jepson Herbaria Archives, University of California, Berkeley

 
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Title:
Jepson Field Book volume 28_46
Description:
Mt. Tamalpais [Jan. 9, 1914] Dendromecon rigidum, very twiggy and dense growth shrubs 4 to 6 ft [feet] high in lower part of railway embankment where soil is deep from "fill." Branches die back in winter more or less, and are sub-deciduous. Root sprouts acc. [according to] Matthews. Arctostaphylos nummularia, shrubs 2 to 4 ft. [feet] high, fire killed utterly, without a sign of sprouting ever! Struck dead as if electrocuted. Shrubs not at all or scarcely burned, the leaves persisting as if frost killed. Pickeringia montana, its tap root is very stout, fleshy and somewhat brittle. It runs down 4 or 5 ft [feet] at least. Tap root swollen just below ground. Quercus wislizenii frutescens, its surface roots of great size 10 ft. [feet] long and 1 to 3 in. [inches] thick. Apparently these roots spread along the surface and do not go down. ::::::::: [Mt. Tamalpais] Jan. 9, 1914 Juglans californica. Wild along Nun's Canyon, north of Kenwood, in Napa Co. [County] acc. [according] A.E. Wieslander, Bot. 112. He also says that Arctostaphylos (?manzanita) attains size of small trees in foothills towards Boyes' Sprs [Springs]. Largest specimens he ever saw. A.E. Wieslander student went with me today to Tamalpais for field work. Nodules (mycorhizae) on roots as follows: Ceanothus thyrsiflorus Ceanothus rigidus Ceanothus foliosus Pickeringia montana  No. 5708. Ceanothus thyrsiflorus Esch. Nodules on roots. Abundant.  No. 5709. Ceanothus cuneatus (Hook) Nutt. Nodules on roots.  No. 5710. Ceanothus foliosus Parry. Nodules on roots.
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http://ucjeps.berkeley.edu/images/fieldbooks/volume_28/img354.jpg
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University and Jepson Herbaria Archives, University of California, Berkeley
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