AUSTRAL-AMERICAN REGIONS. 



139 



(No. 2); a second species. Smaller; the leaves strigosely-lanate. Intermingled 



in the beds of spinescent plants, and sheltered by them iu the Desert. 



Fragrosa ? (No. 3). Densely congested; the leaves incised, pilose on the upper surface; 

 mericarps angular, as in Bolax, and crowned with the persistent calyx ; the calyx- 

 teeth pointed. Growing in large floor-like patches, impacted, indurated, and even 

 above; but in reality underground trees, having large woody branches, though perhaps 

 not rooting very deeply. Lumps of a resinous exudation copiously interspersed. The 

 floor-like patches were observed to occur not only in the Desert, but in places soaking 

 with moisture from the melting snow. 



Azorella? (No. 4). Densely congested, and agreeing in habit with the preceding plant; 

 the leaves entire, pointed; fruit large, gibbous, entirely smooth. Growing in the upper 

 portion of the Desert, towards the snow. 



Mulinum acaule? (No. 3). Cespitose, growing in even-topped beds that resemble those 

 of Diapensia Lapponica ; (fruit sessile on the crown of leaves). Growing in the lower 

 portion of the Alpine Desert. 



Macrorhynchus? (No. 2). Low, depressed; leaves runcinately-pinnatisect ; calyx-scales 

 pubescent on the margin. In the lower portion of the Alpine Desert. 



(Chuquiraga; bis No. 2 lower down, in the Middle Mountain-region). Extending through- 

 out the Alpine Desert to the vicinity of the accumulated snow. 



Gen. (Facelid? No. 1). The root slight, as if annual; the whole plant an inch high, 

 but covered up, and concealed among long wool ; the leaves triangular, broadest at 

 the apex, with a projecting mucro; the flower or floret-rays dark crimson. In the 

 lower portion of the Alpine Desert. 



Nassauvia aculeata, Poepp. ? (No. 3). Growing in beds, a few inches high ; the leaves 

 so sharply spinescent- as to prove exceedingly troublesome. In the upper portion of 

 the Desert, towards the snow. 



— sericea, Poepp. ? (No. 4). Procumbent, forming beds a few inches high ; leaves 



sharply spinescent, and as troublesome as those of the preceding species. In the upper 

 portion of the Desert, towards the snow. 



Gen. Compos.? (No. 1). Leaves opposite, linear; long, lax scales; white toment. 

 Growing along the margin of the bank of snow. 



Gen. Compos. ? (No. 1). Herbaceous, presenting the Alpine aspect and habit of growth, 

 but of extremely light consistence ; leaves stellately-disposed, lanceolate, crenately- 

 dentate, hairy on the upper surface. 



Erigeron ? (No. 14). Having the habit of Noticastrum ; the stem and leaves pilose. 

 Growing along the margin of the bank of snow. 



Aploppapus (No. 10) ; leaves tenderly herbaceous, obovate, paucidentate. In the lower 

 portion of the Alpine Desert. 



(Werneria? No. 1). Nov. gen. Senec. Having the habit of Tripolium ; but stemless, or 

 the flower radical ; calyx monophyllous, terminating in about ten calyx-teeth. Growing 

 in moist places along the margin of the bank of snow. 



Senecio (bis, either No. 32 or 33 of the Middle Mountain-region). The flowers yellow. 

 Growing in dense depressed beds throughout the Desert to the vicinity of the snow. 



Gen. incert. (bis No. 1 lower down, in the Middle Mountain-region). Leaves alternate 

 and obovate ; the flowers not seen. 



Pratia (No. 2) ; the leaves Viola-like. Growing in moist places along the margin of the 

 bank of snow. 



