170 



DISTRIBUTION OF PLANTS. 



Cyperus articulatus? (No. 41). Leafless; the stern articulate, four to six feet high. 

 Subaquatic; growing in the environs of Callao and Lima 



(No. 42). Three to four inches high ; and having two or three sessile spikelets. 



In the environs of Callao. 



(No. 43). A foot high; the umbel compound; the spikelets of about twelve flo- 

 rets. In the environs of Callao. 



(No. 44) ; near C. dentatus. One to four feet high ; the spikelets compressed, 



consisting of from eighteen to twenty-four florets. In the environs of Callao. 



Paspalum (No. 11); inflorescence in two long spikes; with the florets small. In the 

 environs of Callao and Lima. 



(No. 12). Six feet high ; the leaves an inch wide; the spikes with four rows of 



florets. In the environs of Callao. 



(No. 13). A foot high, pubescent; broad-leaved. In the environs of Callao. 



(No. 14); near P. distichum ; tufts of hairs at the mouth of the sheaths. Abun- 

 dant back of the sea-beach. 



Ceresia (No. 1). In the environs of Callao. 



Panicum (No. 40) ; like P. virgatum. Three to five feet high, with a spreading panicle. 

 In wet ground, in the environs of Lima. 



(Sporobolus) Indicus ? (compare No. 2 Singapore, Australia, St. Helena, and the moun- 

 tains of Yemen). Maritime ; growing on the inland slope of the sea-beach. 



( ? No. 8 ; or compare) Agrostis. Panicle coarctate ; glumes long, acuminate. In 



the vicinity of Callao; and perhaps the same species, at Lima. 



Agrostis (? No. 35). Having much of the habit of the (Brizopyrum) ; and growing in 

 company, in the depressed ground back of the sea-beach. 



Deyeuxia ? (No. 3). Six to ten feet high ; the margin of the leaves serrated. Forming 

 cane-brakes around Lima and Caballeros, and elsewhere in the infiltrated ground ; the 

 long, naked flower-stems, and flabellately-disposed leaves, imparting a peculiar aspect. 



? (No. 4) ; a larger species. Ten to twenty feet high; the margin of the leaves 



serrated ; the florets larger, and more acuminate ; the base of the corolla with long 

 hairs. Forming cane-brakes; and especially, a principal portion of the extensive one 

 around the mouth of the Rimac. — On the 16th of May, we passed a cane-brake on 

 fire, on the road to Caballeros ; and though at a great distance, we could hear the 

 successive loud explosions produced by the bursting of the hollow joints. 



Phragmites (compare No. 1 Italy, Oregon, California, our Atlantic States, Patagonia, and 

 Chili). Six to twelve feet high. Exclusively occupying extensive tracts of the above- 

 mentioned cane-brake, around the mouth of the Rimac and along the road to Lima. 



? (No. 2) ; larger than the preceding species. Ten to twenty-five feet high ; not 



seen in flower. Forming cane-brakes in wet ground, from Lima to the Andes. The 

 stems used for building purposes in the Interior ; as those of Deyeuxia are at Callao. 



Kyllingia (compare Polynesian Groups, East Indies, St. Helena, and Rio Janeiro). 



Growing along the margin of irrigating canals at Lima. 

 Zea mays, (No. 1; bis Mindanao, our Atlantic States, and Chili); Indian corn. (Of 



Aboriginal introduction ; and at the present day), abundantly cultivated j but chiefly 



used for making a kind of beer, called " chicha." 

 Pennisetum cenchroides ?. Growing in the environs of Callao. 



