AUSTRAL-AMERICAN REGIONS. 



129 



(No. 9). Very tall; full eight feet high, with the stem proportionally large ; 



the whorled branchlets more than a foot in length. On the river-bank of the Maipu 

 at Santiago. 



Azolla (bis No. 2 California, Brazil, and North Patagonia). Exceedingly abundant on the 



surface of all running streams, from Valparaiso to the Andes. 

 Polypodium (No. 54) ; pillabilcum of Feuillee. Epidendric on the trunks and branches 



of trees, on the mountain-ridge that commences twelve miles South of Valparaiso. 

 Cheilanthes (No. 12). Densely tomentose; the frond much divided. On the "rocks 



of the sea-coast North of Valparaiso," Brackenridge. 



(No. 13) ; the frond narrower. 3Iore frequent; growing in clefts of rocks on the 



• mountain-slope back of Valparaiso. 



Adiantum Chilense ? (No. 28). A foot high ; smooth above, and the stipe smooth. En- 

 virons of Valparaiso. 



(No. 29); apparently distinct; being hairy all over. Frequent in the environs 



of Valparaiso. 



Blechnum hastatum, (No. 12). In mountain-ravines back of Valparaiso. 



Lomaria (No. 11). Six feet high ; the frond broad. In mountain-ravines back of Valparaiso. 



Asplenium (No. 60). Frond small, only three or four inches high. In the deep moun- 

 tain-ravine three miles South of Valparaiso ; rare. 



(Thelypteris ? No. 16). Habit of Aspidium thelypteris, but much larger. Frequent in 

 the environs of Valparaiso. 



Aspidium (No. 35). Habit of Pteris aquilina. In the mountain-ravine three miles South 

 of Valparaiso. 



Gen. Dicksonia-like (No. 1). Stipes arising in a linear series from a root-like rhizoma ?, 

 creeping below the surface of the soil ; the fructification not seen. Found by Mr. Rich 

 in a ravine of the mountain-ridge that commences twelve miles South of Valparaiso. 



Marchantia (No. 8). Frond small, and tenderly herbaceous. In mountain-ravines back 

 of Valparaiso. 



Hypnum (No. 24). In a ravine of the mountain-ridge that commences twelve miles 



South of Valparaiso. 

 Musci incerti. A few other mosses met with, but not critically examined. 

 Ramalina? (No. 7). 



Borrera flavicans, (No. 4). Adhering to the stems and surface of the columnar Cereus. 



furfuracea, (No. 5). 



Usnea (No. 6). 



Lichenes incerti. A few other Lichens met with, but not critically examined. An in- 

 stance observed of living leaves overgrown with Lichens, as in moist Tropical woods. 

 Agarieus (No. 22). 



Fungi incerti. A few other Fungi met with, but not critically examined. 



Negative characters. The following enumeration of negative fea- 

 tures is applicable both to Lower Chili and the country beyond, as 

 far as the snow on the Andes. 



Ferns were seen only in the vicinity of Valparaiso and of the sea- 

 coast; and were there confined to ravines, with the exception of some 



33 



