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Jepson Field Book Transcriptions · Jepson Herbarium
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40_2 Buena Vista, Amador Co. wood below. The intense insolation and the high temperatures must result in conditions of transpiration or water-loss which causes the strains which bring about the peculiar configuration of these ribbon-like structures, for they are twisted and turned on each other, and even curved or contorted into a full circle. Such contorted structures must result from tensions due to unequal water loss (no. 9961). Bark gray or whitish, only the your branches red-brown. cont. p 7. The plants from pure colonies. The shrubes give a red-borwn color which is distinctive. On this account one can pick out its colonies over a considerable extent of country between Ione and Buena Vista. The colonies are sharply defined and sometimes the colony marches |
40_3 May 23, 1923. acorss the summit of a hill-top like a "fire-lane", so marked is it. These hills are rocky - broken red shale-like rock. They are covered with high chaparral (Arctostaphylos viscida, scrub Quercus wislizenii with an occasional Pinus sabiniana) or low chaparral (the pure colonies of A. myrtifollia). The colonies are often roundish, 1/8 mile in diameter, or band-like (1/8 mile long and 80 yds. wide). The shrubs are mostly 3/4 to 1 1/4 ft. h. I would estimate that, from a point on the Buena Vista - Ione road I could see 1200 acres pure. see p. 12 infra. cf. vol. 39, p. 193. - We went to Buena Vista from San Andreas by way of Burson and Camanche, thence over the Mokelumne River bridge. The river bank on the south side at this point is rock in horizontal and vertical cleavage so that the bank |
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