231 
polyantha, but distinguished by the reduced size, rostrate oper- 
culum and absence of cilia. 
3. PYLAISIELLA InTRICATA (Hedw.). 
Prerigynandrum intricatum Hedw. Spec. Musc. 85. pl. 78. 1801. 
Pylusia intricata Schimp. Bry. Eur. fasc. 46 and 47. 1851. 
Hypnum intricatum C. Muell. Syn. 2: 338. 1851. 
Stereodan intricatus Lindb. Musc. Asiae-bor. 2: 151. 1890. 
Pylaisia Selwinii Kindb. Ott. Nat. 2: 156. 1889. 
Common in the northeastern United States and eastern 
Canada, Kansas, Missouri, Misisssippi, Georgia (Ravenal), Florida 
(Chapman). 
This species is easily distisguished by its curved branches, 
numerous quadrate alar cells and partially adherent segments. It 
varies a great deal in length of leaves and in length of leaf-cells, 
length and color of capsule and size of spores. Authentic speci- 
mens of Pylaisia Seliwintt Kindb. show that it is merely a form of 
this species growing in exposed dry places. The plants are 
darker and the leaves more strongly recurved than usual. 
4. PYLAISIELLA VELUTINA (Schimp.) Kindb. Can. Rec. Sci. 1894: 21. 
Pylaisia velutina Schimp. Bry. Eur. fasc. 46 and 47. 1851. 
New Brunswick, and Mt. Desert, Maine, south to North Caro- 
lina, west to Ohio and Indiana. 
Distinguished from P. intricata by the entirely adherent seg- 
ments, narrower leaves with fewer quadrate alar cells, and larger 
spores, 
Pylaisia revolutifolia Kindb. in Herb. Macoun, from Leaming- 
ton, Ont., August 4, 1892, and Pelee Point, Ont., is Antodon 
repens. 
3. HOLMGRENIA Lindb. Ofv. Vet.-Ak. Férh. 1862: 605. 1863. 
{[OrtHorHEcium Br. & Sch. Bry. Eur. fasc. 48. 1851. Not 
Schott. & Endl. Melet. Bot. 31. 1832. ] 
1. H. chrysea. 
Gametophyte large (5-10 em. high); leaves strongly plicate 
2. H, stricta. 
Gametophyte small (2 cm. high); leaves not plicate. 
