CHARACTERS OF TRIBES AND GENERA. 355 



OBS. The first is a native of South Brazil, and the other 

 very generally distributed throughout the West Indies and 

 Tropical America. As might be expected, the plants of the 

 different localities have been described under no less than 

 ten specific names, their differences resting entirely on the 

 difference of length and breadth of the sterile pinnae, which, 

 although retained under cultivation, I do not consider it a 

 sufficient character to be specific. 



207. TROCHOPTERIS, Qard. (1842). 

 Hook. Syn. Fil. 



Vernation fasciculate, acaulose. Fronds depressed, rosu- 

 late, 5 to 1 inch in length, half an inch in breadth, five- 

 lobed, the two lower lobes small, contracted, laciniated, the 

 lacinae bearing the sporangia. Veins flabellate, dichoto- 

 mously forked, venules free. 



Type. Trochopteris eleyans, Gard. 



Illust. Hook, and Bauer Gen. Fil., t. 104, A; Moore 

 Ind. Fil., p. 93, B ; Hook. Syn. Fil., t. 8, fig. 67. 



OBS. This is a peculiar little Fern, a native of Brazil, 

 growing on the face of rocks. The fronds lying flat, their 

 appearance led Dr. Gardner to compare them to little 

 wheels. It may be considered to be a modified state of 

 Anemia, but its distinct habit is sufficient to mark it as a 

 separate genus. 



Sp. T. elegans, Gard. Hoolc. Lond. Journ. Hot. 1, t. 4t. 



208. MOHRIA, Sw. (1806). 



Hook. Syn. Fil. 



Vernation fasciculate, acaulose, caespitose. Fronds linear, 

 bi-tri-pinnatifid, 6 to 12 inches or more in length, the fertile 

 partially contracted, segments small. Veins free. Spo- 



