PERUVIAN REGIONS. 



193 



Stipa (No. 20). Six feet high, branching; awn plumose. In the environs of Obrajillo. 

 Aristida (No. 21). Annual, six to nine inches high; stems simple, not branching; florets 



having the awns nearly equal. In the lower portion of the region, along the ascent 



to Obrajillo. 



Gen. Trichochloa-like (No. 1); near Stipa agrostoides ; the calyx-glumes very short. 



(In the lower portion of the region, along the ascent to Obrajillo.) 

 Gen. Agrostoid? (No. 1 ; Deschampsia-like, but) the florets single. Habit of Trisetuui ; 



three to six inches high; panicle dense and raceme-like as in Aira cespitosa ; corolla 



awned on the back. In the environs of Obrajillo. 

 Gen. Arundo-like (No. 1). Three to five feet high; panicle crowded; calyx-glumes 



long, containing about six florets, with long hairs intermingled. On the banks of 



streams in the upper portion of the region, along the ascent to Culuay. 

 Atheropogon (No. 2); a congener of A. oligostachyum ? Annual; three to six inches 



high; a single spike. Frequent in the lower portion of the region, along the ascent to 



Obrajillo. 



Poa (No. 24) ; like P. viridis. Two to three feet high ; spikelets of four florets. In 

 the environs of Obrajillo. 



Eragrostis (No. 28; compare No. 27 Lower Peru); near E. pilosa. Sheaths hairy; flo- 

 rets congested or crowded in a dense panicle. In the environs of Obrajillo. 



; perhaps not distinct (from No. 23) ; long hairs on the stem and sheaths; the 



panicle diffuse. In the environs of Obrajillo. 



Melica (No. 5). One to two feet high; the stem scabrous; spikelets smooth. In the 

 environs of Obrajillo. 



Festuca (No. 14); having short awns. Growing in the environs of Obrajillo; and perhaps 



the same species, at Baiios. 

 (No. 15). Two to three feet high; the spikelets smaller ; the awns short. In 



the environs of Obrajillo. 

 Bromus (No. 10); stem and leaves smooth; florets scabrous, awned. Growing in the 



environs of Obrajillo. 



(No. 11). Annual; six to eight inches high; spikelets sometimes Stipa-like 



with only two florets, and sometimes with as many as five florets ; long awns. In the 

 environs of Obrajillo; and perhaps the same species at Bafros, but two to three feet 

 high, with a spreading panicle. 



Elymus (No. 16). One to two feet high. Growing along the upper margin of the 

 region, at Bafios. 



Equisetum (No. 12). Clustered ; three to four inches high. In the upper portion of the 

 region, along the ascent to Culuay. 



Festuca bromoides? (of Europe) ; or perhaps, an indigenous allied species. In the 



upper portion of the region, towards Culuay. 

 Flordeum vulgare, (bis Mocha, Egypt, and No. 1 Northern Asia); barley. Under 



cultivation in the vicinity of Obrajillo. — Whcnt (Triticum) was not seen cultivated ; 



and we were told, "that the flour used at Obrajillo was brought from Lima." 

 Sorghum (Halepense ? ; compare Callao in Lower Peru, and No. 1 East Indies). One to 



two feet high. Growing in the environs of Obrajillo. 



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