SPALDING 
PLATE 8 
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Zone of creosote-bush at the foot of Tumamoc Hill on the north. In the background Santa 
Catalina Mountains beyond the flood-plain of the Santa Cruz River. 
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Tucson slope beyond the wash west of Desert Laboratory. Franseria deltoidea and Opuntia 
fy fulgida constitute the characteristic vegetation at this point. 
CAMPBELL ART CO., ELIZABETH, N. J. 
