30 
Wisconsin Academy of Sciences , Arts and Letters. 
CYNODONTIUM, p. 59. 
Annulus very narrow and persistent or 0. 
Leaf cells conical- to spinous-mamillose. 
Teeth not papillose, seta straight .... C. Scliisti, L 
Teeth papillose, seta often arcuate when moist . C. gracilescens, 2* 
Leaf cells not mamillose, papillose over partitions . . C. virens, 4,. 
Annulus distinct, revoluble.C. polycarpum, 3. 
DICHODONTIUM, p. 61. 
Costa vanishing below apex, seta yellow. . . . D. pellucidum, L. 
Costa percurrent, seta red. D. Canadense, 2. 
TREMATODON, p. 62. 
Collum equalling or somewhat exceeding the oval-oblong 
sporangium. T. ambiguum, L 
Collum greatly exceeding the cylindric sporangium . T. longicollis, 2. 
DICRANELLA, p. 64. 
I. Cells of the exothecium rectangular-quadrate; seta red ; costa usually• 
broad and indistinct below. 
A. Leaves not sheathing, erect-spreading. 
Costa percurrent or excurrent. 
Annulus 0, peristome papillose. 
Capsule cernuous, curved .... 
Capsule erect, symmetric .... 
Annulus present, peristome not papillose 
Costa ceasing within the apex, annulus large, simple 
. D. varia, 6. 
D. rufescens, 7. 
D. parvula. ! 
D. debilis, 8. 
B. Leaves , from a sheathing base, squarrose. 
Broad, obtuse.D. squarrosa, 4. 
Abruptly subulate. 
Capsule striate, substrumose, leaf apex entire , D. Grrevilleana, 2. 
Capsule not Striate nor strumose, leaf apex serrulate . D. Sclireberi, 3. 
1 Kindberg: Bull. Torr. Bot. Club xvi (1889) 91. 
