34 ICONES MUSCORUM. 



POTTIA RIPARIA, Aust 



Tab. 21. 



Plants late laxeque caespitantes, fusco-yirides, pusillae. 



Caulis 2-4 lineas altus, simplex, basi tantum radiculosus. 



Folia late oblonga vel subspatliulata, brevi-acuta, plana, usque 

 ad apicem grosse serratum valide costata, Isevia, minute areolata, 

 cellulis superne quadrato-rotundatis inferne lougioribus aequi- 

 lateralibus. 



Flores dioici ? masc. ignoti. 



Capsula in pedicello pertenui longe exserto oblonga vel anguste 

 ovato-cjlindrica, erecta vel subcernua ; operculo cylindrico-conico 

 mamillato ; annulo lato duplici ; columella longa emergente. 



PoTTiA EiPARiA, Aust. Musc. Appalach. No. 112. 



Hab. On moist rocks, along streams, on the Palisades 

 of Northern New Jersey and Southern New York ; rarely- 

 fertile, Austin. 



TAB. 21. — POTTIA RIPARIA. 



1. Plantae naturali magnitudine. 



2. Planta. 



3. Folia. 



4. Sectio transversalis folii. 



5. Ejusdem areolatio. 



6. Capsula operculata. 



7. Capsula vacua. 



8. Capsula sicca cum pedicello dextrorsum et sinistrorsura torto. 



9. Pars caulis, vaginula, et archegonia. 



10. Columella et operculum. 



11. Annulus. 



