€ENERA IN CLASS XXIV. CRYPTOGAMIA. 117 



globule is girt with an elastic ring, which breaks elastically* and 

 sheds a dust, which are the seeds. 



This order contains thirty-one genera, arranging under two 

 heads : 1 . Annular ; i. e. having the capsules girt with an elastic 

 ring, contrary to the valves, contains nineteen genera, which are 

 as follows, viz. Acrosticum...Pteris (^y^)...Blechnum...He- 

 mionitis. . .Lonchitis. . . Asplenium (spleenwort) . . .PoLYPQDIUM. . » 

 Adiantum... . Trichomanes Darea...Scolopendrum [hart's 



•tongue) ... WOODWARDIA ... LlNDSiEA ... VlTTARIA ... DaVALLIA„,o 

 DlCKSONIA ... CYATHEA ... H\ T MENOPHYLLUM...and SCHIZZEA. 2. 



Exannular, capsules without rings, Gleichenia...Marattia...Da= 

 jsmea...Equisetum (/iorse-taz7)...OpHioGLOssuM (adder's tongue)... 

 Osmund a (moon-wort)... Lycopodium (club-moss) ... Porella..,, 



SALVINIA...MARSILEA...PlLULARIA...and IsOETES (quill-WOrt). 



Order 2. Musct, mosses. The character of the plants com- 

 prehended under this title are, antherae without filaments ; the 

 female flowers distinct, and without any pistillum ; and the 

 seeds, consisting only of a naked corculum, without cotyledon 

 or tunic. The genera of this order have been distinguished by 

 Linnaus, according to the following circumstance, viz. The an- 

 therse, with or without a calyptra*, placed on the same plant as 

 the female floret, or on a distinct one ; and the female aggregate, 

 or single. The order contains twenty-two genera; 1. With no pe- 

 ristome, three genera. ..Phascum (earth-moss)... Sphagnum (bog- 

 moss) . . . Gymnostomum (beardless ??ioss). 2. With a simple peri- 

 stome, which contains nine genei'^....TET-RAi?ms (four-toothed ?noss) 

 •. . . Andrjea. . .Splachmum (gland wos.s)...Encalypta (extinguisher 

 ?W05s)...Pterogonium (iving wzos.s)...Grimmia...I1icranum (fork 

 7?ioss) . . .Trichostomum (fringe moss) . . .Tortula (screw moss). 3, 

 With a double peristome, which contains ten genera... Orthotri- 

 chum (bristle moss)...NECKERA..,FuNARiA (cord, moss). i.BuxBAu- 

 jvii a . ,. Bartramia . «, e Mnium (spring ??toss)... Bryum (thread ?noss) 



* A veil 



