VERMONT MOSSES. 



5--' 



6.— 



9-— 



I3-— 



14.- 



I5-— 



i6. 



17.— ■ 



18.— 



Capsule pedicellate, exserted. 



Capsule subsessile, not exceeding the hatr-poinled perichaetial leaves. 



Peristome fonned of four thick teeth. 



Peristome formed of more than four teeth. 



Peristome none. 



■Leaves ecostate. 



Leaves costate. 



Annual, from a persistent protonema; capsule long-pedicellate. 



Perennial ; capsule immersed. 



Leaf cells elongated. 



Leaf cells isodiametnc. 



Capsule ribbed when dry. 



Capsule not ribbed when dry. 



Leaves obovate-oblong, subspatulate, margins plane. 



Leaves lan:eolate, margins more or less rolled. 



■Upper leaf-cells empty and clearly defined. 



Upper leaf-cells minute, opaque. 



Peristome single. 



Peristome double. 



Teeth articulate. 



Teeth not articulate. 



Teeth 16. 



Teeth 32. 



Calyptra mitrate. 



Calyptra cucuUate. 



Calyptra plicate. 



Calyptra not plicate. 



Lower median leaf-cells linear; hairs of calyptra flexuose. 



Buxbaumia. 



Webera. 



Georgia. 



13. 



7- 



8. 



9- 



Schistostega. 



Hedwigia. 



Physcomitrium. 



10. 



Anoectangium. 



II. 



Pottia. 



12. 



Barbula. 



MoUia. 



14. 



39. 



15- 



31- 



16. 



20. 



17- 



23. 



19. 



18.5. 



Weissia. 



18.5 



19. 



20,— 



Lower median leaf-cells hexagono-rectangular ; hairs of calyptra straight. 



Orthotrichum. 



—Leaf cells small.quadrate and punctate, obscure; seta without prominent apophysis. 19. 



Leaf cells large, very distinct ; seta with a prominent apophysis. Tayloria. 



-Calyptra cylindric ; beak long-clavate. Leersia. 



Calyptra not cylindric ; beak long or short, not clavate. Grimmia. 



Teeth from a high tesselated membrane. Tortula. 



Teeth from a narrow membrane. 2t. 



■Areolation lax and hyaline at base, minute, obscure and chlorophyllose above. Mollia. 



Areolation small, rectangular and slightly hyaline at base, incrassate, rotundate or 



quadrate and well defined above. 



Barbula. 



