No. II.] THE liRVOl'llVTES OF CONNECTICUT. QI 



51. Leaf cells isodiametric above the middle; calyptra 



cucullate Pottia, p. 109 



Leaf cells elongated above the middle; calyptra mitrate 52 



52. Stalk almost lacking Aphanorrhegma, p. 117 



Stalk long (to 2 cm.) Physcomitrium, p. 117 



53. Capsule symmetrical or nearly so 54 



Capsule strikingly unsymmetrical 57 



54. Teeth of peristome 4 Georgia, p. 172 



Teeth of peristome 32 or 64 55 



55. Calyptra cucullate, nearly smooth Catharinaea, p. 172 



Calyptra mitrate, densely hairy 56 



56. Capsule without stomata, cylindrical Pogonatum, p. 174 



Capsule with stomata, prismatic or cylindrical 



Polytrichum, p. 174 



57. Capsule sessile; leaves green and conspicuous. .Webera, p. 171 

 Capsule raised on a thick, red stalk; leaves colorless and 



very minute Buxbaumia, p. 172 



[Pleurocarpi] 



1. Leaves distichous Fiissidens, p. 103 



Leaves in 3 or more ranks 2 



2. Segments of inner peristome rudimentary or filiform, not 



split ; cilia none 3 



Segments of inner peristome distinctly carinate, often split 



along the keel 10 



3. With a distinct, carinate basal membrane, segments very 



rudimentary; leaves papillose Thelia, p. 135 



Without a basal membrane; leaves smooth or nearly so.. 4 



4. Segments connected, at least in the apical region, by 



transverse bands 5 



Segments entirely free, sometimes very rudimentary 6 



5. Leaves with an excurrent midrib Dichelyma, .p. 130 



Leaves without a midrib Fontinalis, p. 128 



6. Leaves complanate, transversely undulate Neckera, p. 131 



Leaves spreading, not transversely undulate 7 



7. Plants soft, often forming wide, velvety tufts; capsule 



strikingly contracted below the mouth when dry 



Anacamptodon, p. 134 

 Plants coarse, growing in lax, frequently pendent tufts; 



capsule not contracted below the mouth when dry 8 



8. Leaves with a midrib 9 



Leaves without a midrib Leucodon, p. 130 



