Page:The Scientific Monthly vol. 3.djvu/54

 TEE SCIENTIFIC MOXTHLY

��Fio. 3. Spreading srtKtrexwnt caclui, Opuntla ap. gronlns near Qajea'a Well, nbout fortj milea lODtbweat ol TncaoD. Meaqalce treea tn the baekyroniid. The graaa Id the tarefround la unoanallr abundant. Photofraph bj Dr. UaeDanxal.

of claBsification, but trees, properly so called, if age be taken into ac- count, which takes away the monotoDy of the stones, gravel and adobe, only to replace it for the average traveler by a monotony of cacti, yuccas and agaves, scattered shrubby bushes or small trees — for the smaller plants are seen only at limited seaaona of the year and are commonly not visible from the Pullman vrindow.

��Fia. i. Youns s'ant cactt or Sabuaroa growing among aplnote llgneeua ptanU. Note the more matare slant cacti and meaqalte treei In the backfrannd and tht imaUer ebrnba and the procumbent platTopuntaa tn the foreground where the mm floor la bare of moit other TegetatloD. Photograph br Dr. UacDonsa^-

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