PERUVIAN REGIONS. 



181 



(No. 4). Nine inches, or of the same size with the preceding; pulverulent; the 



leaves less acute; the calyx-segments shorter; flowers scarlet. At the upper margin 

 of the region at Bafios. 



Sedum? (No. 13); short fleshy leaves. Growing on rocks, from Obrajillo to the Para- 

 era at Culuay. 



Cereus (bis No. 11 Yaso in Lower Peru). Frequent throughout the lower portion of the 

 region, as far as Obrajillo. 



? (No. li) ; perhaps a congener of No. 13; compare also Opuntia and Echino- 



cactus. The whole plant ovoid, and six to eight inches high ; flowers scarlet, and 

 showy. In the upper portion of the region, growing two and a half leagues from Culuay. 



Opuntia (No. 13). Normal; flat-jointed; like C. tuna; and three to five feet high. From 

 the commencement of the rains and of the region, to Obrajillo. 



(No. 14) ; " habit of 0. Curassavica; procumbent, fragile; stem-joints four inches, 



long-ovoid, flattish; the flowers not seen. Between Yaso and Obrajillo," Brackenridge. 



? (No. 15). Ten to fifteen feet high, with a stout woody trunk, and many spread- 

 ing branches ; the latter composed of joints, ten inches by five, regular and ovoid, having 

 about six longitudinal ribs ; the whole plant of a greyish tint. In the lower portion 

 of the region, along the ascent to Obrajillo. 



Nov. gen. Cactac. (No. 1). Eight to ten feet high; the trunk slender, woody at base, 

 rigid and upright, with wide-spreading candelabra-like branches at the summit; distant 

 clusters of long thorns ; fruit dry, capsular, two inches long, with large stony seeds. 

 Along the upper margin of the region at Culuay ; in some instances forming groves. 



Ribes (No. 14); leaves smooth, repand, dentate; fruit almost sessile. Along the upper 

 margin of the region at Culuay. 



(No. 15) ; not glandular; leaves abruptly cuneate at base, plicate. In the envi- 

 rons of Obrajillo. 



(No. 16) ; a normal currant. Three to six feet high ; leaves pentagonal, an inch 



in length and breadth, denticulate, the margin having numerous dentures, and the 

 upper surface dotted; flowers in long bracteate racemes. Along the upper margin of 

 the region at Baiios. 



Bowlesia lobata, Ruiz & Pav. (No. 1) ; leaves deeply divided into from three to five lobes. 



Frequent at Obrajillo, and elsewhere in the mountain-region. 

 Hedyotis ? (No. 20). An ornamental shrub, eight to twelve inches high, branching ; 



leaves linear, involute. Frequent in the environs of Obrajillo. 

 Galium aparine? (compare No. 5 Oregon, our Atlantic States, and Terra del Fuego); 



leaves linear, about seven in a whoi'l. Frequent in the environs of Obrajillo, and to all 



appearance indigenous. 

 (No. 24) ; leaves broad, verticillate in fours ; flowers larger than usual; the fruit 



setose. In the environs of Obrajillo. 



Helosciadium leptopbyllum ? (No. 2; compare Australia); a congener of iRthusa nodi- 

 flora?. One to two feet high, diff'u.se, branching; leaves multifid, the segments linear; 

 mericarps five-ribbed. Growing around Obrajillo. 



; perhaps the same species; but annual, and only two to three inches high. 



Growing beyond and above Obrajillo. 



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