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Jepson Field Book volume 21 page 44 | University and Jepson Herbaria Archives, University of California, Berkeley

 
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Title:
Jepson Field Book volume 21 page 44
Description:
Ukiah, 620 feet.  No. 4012. Claytonia perfoliata Donn ex Willd. Woods in Mill Creek Ca_on.  - Purdy ran on about the Cycle of fire in chaparral.  Lilium rubescens persists in burns whre it is too dry for it, ie. where its seedlings can not establish themselves during the rains sufficiently to tide over the long dry period.  But as the brush grow up again the conditions change and seedlings get a hold.  Then another fire.  He also brought in to the scheme the beetles whit are killed out by the fire. :::::::::  March 25, 1910.  Goose-pen trees 4000 to 5000 years old.  Cf. Laurel and Black Oak.  Some Laurel goose-pens might easily be 4000 to 5000 years old.  The case is different from an individual tree.  The goose pens have a chance to go on indefinitely.  A hundred years is nothing to them.  Some of the Balck Oak circles which have gradually [spread] so as to be indistinctly recognizable represent a great age.  Compare also the Redwood goose-pens.
ID:
http://ucjeps.berkeley.edu/images/fieldbooks/volume_21/http://ucjeps.berkeley.edu/cgi-bin/display_fb.pl?page_no=21_44
Repository:
University and Jepson Herbaria Archives, University of California, Berkeley
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