38 
Wisconsin Academy of Sciences , Arts and Letters. 
Monoicous. 
Plants short (5 mm.) 
Teeth cylindric, nodose-articulate, leaves spreading . L. pallidum, 5_ 
Teeth flattened, linear, trabeculate, perforate, leaves 
secund.L. Schimperi, 6. 
Plants longer (2-3 cm.), glaucous . . . L. glaucescens, 7. 
TRICHQSTOMTJM, p. 108. 
I. Lamina composed of one layer of cells, papillose. 
Margin reflexed or undulate, entire. 
Annulus 0 .T. tophaeeum, 1, 
Annulus large, compound.T. pyriforme, 2. 
Margin plane or incurved. 
Costa reaching apex or excurrent; serrate above. 
Base of leaf yellowish, with thick walled rectangular 
cells.T. crispulmn, 3. 
Base of leaf hyaline. 
Abruptly mucronate or obtuse, with long papillae T. flavo-Yirens, 4. 
Gradually acuminate, papillae low . . T. liitidiim, Sch. 1 
Costa ceasing far below apex; entire . . . T. Coloradense. 2 
II. Lamina of two layers, upper surface mamillose, lower smooth. 
Peristome not twisted, seta arcuate or variously bent . T. flexipes, 5* 
Peristone twisted, seta subflexuous T. anomalum, 6, 
DESMATODON, p. 110. 
I. Capsule erect or nearly so. 
A. Leaves without a hyaline or thickened border. 
1. Not papillose , 1). systilius, 2 . 
2. Papillose. 
a. Costa excurrent into a hair. 
Capsule oblong (1:2 or 1: 3 excl. lid), 16 teeth divided nearly or quite to base. 
Plants of mountainous regions; calyptra reaching base 
of capsule ........ D. latifolius, 1. 
Plants of lowlands; calyptra reaching half way to base 
of capsule.B .Guepini, 10, 
1 Renauld and Cardot: Bot. Oaz. xiv (1889), 99. 
9 Appendix, p. 413 
