10 VERMONT MOSSES. 



P. alpinum (L. ) Roehl. On the ground in alpine and subalpinc regions. 

 Mt. Ilor, R; Mt. ManHfield, P.; Brookline, G. 



P. capillare (Michx. ) Brid. On the bare soil. Mt. Mansfield, P., fr. • 



P. tenue (Menzies) E. G. Britton. {P. hrericaule Brid.) On bare clayey 

 f?oil ; frequent, especially in mountainous regions. 



P. urnigerum (L. ) Beauv. On the ground. Peacham, I?Z.; Mt. Mans- 

 field, P.; Newfane, G. 



POLYTRICHUM L. Hair Cap Moss. 



I. — Leaves entire with an inflexed margin. 2 



Leaves sharply serrate, plane. 4 



2.— Leaves long- awned; awn rough, hyaline, pilirerum 



Leaves short awned; awn smooth, colored. 3 

 3. — Stems short; leaves spreading, recurved; capsule square, prismatic. juniperinum 



Stems tall; leaves erect-open, straight; capsule small, cuboid. strictum 



4.— Capsule cubical, calyptra covering it to its base. commune 



Capsule tapering into the seta, calyptra shorter. Ohioense 



P. commune L. Common Hair Cap Moss. Abundant everywhere and a 

 great pest in old meadows where it often entirely supplants the 

 grass over large areas. 



P. juniperinum. Willd. On the ground ; not rare. Peacham, B.; New- 

 fane, G. 



P. Ohioense R & C. Mt. Mansfield, D. C. Eaton, P., G. 



This is the plant from the Eastern United States which has usually 

 been referred to P. formosum Hedw. 



p. piliferum Schreb. In dry open places; frequent. 



P. strictum Banks. Abundant in boggy places near the summit of Mt. 

 Mansfield and probably on all the higher mountains. 



Family Y. Fissidentaceae. 



FISSIDENS Hedw. 



f, —Plants terrestrial or submersed but not floating. 2, 



Plants aquatic, filiform, floating. Julianus 



2.— Fruit terminal. 3 



Fruit lateral. 4 



3.— Leaves not bordered. osmundioides 



Leaves bordered. bryoides 



4.— Autoicous; leaf cells distinct. adiantoides 



Dioicous; leaf cells obscure. cristalus 



