PERUVIAN REGIONS. 



167 



(Atriplex? No. 10). Canescent or hoary; the leaves broad. In the environs of Lima, 



growing on the Desert upland. 

 Batis (No. 1). Maritime; forming matted beds half an acre or so in extent, and from 



their yellowish-green color, conspicuous in the depressed ground back of the sea-beach. 

 Gomphrena? (No. 1); leaves obovate. In the environs of Callao. 



(No. 2) ; the flowers more conspicuous, the corolla-glumes hairy. In the vicinity 



of Yanga. 



Begonia (No. 6). Humble; the red stems and white flowers making their appearance 



before the leaves. On the Amancaes mountain-heights ; springing up in the beginning 



of June, and having much of the aspect of a vernal plant. 

 (No. 7). The leaves Misandra-like, and making their appearance before the 



flowers ; the flowers not seen. On the Amancaes mountain-heights, springing up at 



the same season with the preceding species. 

 Polygonum (compare Chili, Polynesian Islands, No. 4 New Zealand and Australia, and 



No. 16 California). Like P. mite and P. persicaria. In wet places, in the environs of 



Callao. 



Euphorbia (compare United States, and No. 44 North Patagonia and Chili). Like E. 



maculata. In the vicinity of Yanga, growing on the Desert upland. 

 Nov. gen. urens, (No. 1) ; Croton of authors. A thick-stemmed shrub, having the habit 



of Jatropha ; one to four feet high, with a few large branches ; broad leaves, with 



prickle-like hairs. Between Yanga and Yaso, growing on the Desert upland. 

 Croton (No. 12). A shrub, two to three feet high ; leaves narrower than in the mountain 



species to be mentioned presently. Between Yanga and Yaso. 

 Gen. Euphorbiac. (No. 1). A shrub, three to five feet high; leaves petioled, ovate, 



serrate ; cymes axillary, peduncled ; five calyx-teeth. On the basal portion of the 



Andes "beyond Yaso, growing in company with the Dodonaea," rare, Brackenridge. 

 Peperomia scutellaefolia, Euiz & Pav. (No. 28). In clefts of rocks, on the Amancaes 



mountain-heights. 



inequalifolia, Ruiz & Pav. (No. 29) ; leaves verticillate. In clefts of rocks, on 



the Amancaes mountain-heights. 



Salix Humboldtiana, Willd. (No. 27). Thirty to fifty feet high, with the trunk two feet 

 in diameter ; being the only indigenous tree of Western Peru. Frequent in the infil- 

 trated ground from Callao to the mountain-region on the Andes. A tall variety 

 having coarctate branches, abundantly planted, and readily mistaken for Lombardy 

 poplars in the landscape. The extreme fibrous roots, from their red color, conspicu- 

 ous in all the fresh-water streams and irrigating canals of Lower Peru. 



Mirabilis Jalapa, (No. 1 ; bis California, and our Northern gardens). In waste ground 



in the outskirts of Lima; naturalized. 

 Chenopodium. Bundles of the stems and leaves sold in the market, and eaten boiled 



as greens. 



Rumex (No. 20). Like R. crispus ; the valves nearly entire, all graniferous. In the 



vicinity of Callao, possibly indigenous. 

 Persea gratissima, (No. 3); the " avocado" pear. The fruit sold in the market. 

 Euphorbia hypericifolia ? (compare Taheiti, Mindanao, Dekkan, and Zanzibar). A foot 



high; hairy. Frequent around Callao and Lima; possibly indigenous. 



