155 
ILLusTRATIONS.—Sull. Icon. Musc. A. 89. 
ExsiccATI.—Sull. Musc. Allegh. 60; Sull. & Lesq. Musc. 
Bor. Am. (Ed. 1) 257, (Ed. 2) 381; Aust. Musc. Appal. 294 ; 
Macoun, Can. Musc. 470. 
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 
Leamington, Ont., August 4, 1892, and Pelee Point, Ont., is 
Entodon repens. 
3. HOLMGRENIA Lindb. Ofv. Vet.-Ak. Fórh. 19: 605. 1863. 
[ORTHOTHECIUM Br. & Sch. Bryol. Eur. fasc. 48. 1851. Not 
Schott. & Endl. Melet. Bot. 31. 1832.] 
Gametophyte in wide glossy bright colored mats (except 
H. intricata). Primary stems irregularly divided, sparsely branch- 
ing. Paraphyllia lacking. Leaves erect, ascending, not decurrent, 
usually entire or sometimes slightly serrulate, acuminate, concave; 
costa short and double or lacking; median leaf-cells linear; basal 
cells shorter and broader; alar little differentiated. Sporophyte rare. 
long-pedicelled ; seta smooth. Calyptra small, fugacious. Cap- 
sule nearly or quite erect and symmetric; operculum conic; an- 
nulus large. Peristome double; the teeth narrowly lanceolate; 
segments lanceolate, as long as teeth, from a broad basal mem- 
brane; cilia short or lacking. 
Gametophyte large (5-10 cm. high); leaves strongly plicate. I. H. chrysea. 
Gametophyte small (2-4 cm. high); leaves not plicate. 
Leaves ovate. 2. H. stricta. 
Leaves narrowly lanceolate. 3. H. intricata. 
I. HOLMGRENIA CHRYSEA (Schwaegr.) Lindb. Ofv. Vet.-Ak. 
Forh. 19: 605. 1863. 
Hypnum chryseum Schwaegr. Schulte's Reise auf. d. Glockner, 
2: 364. 1804. 
Orthothectum chryseum Br. & Sch. Bryol. Eur. fasc. 48. AX. 
dör. 185i. 
Isothectum chryseum Spruce, Annal. & Mag. Nat. Hist. 1849. 
Leskea chrysea Hartm. Skand. Flor. Ed. 6. 1854. 
Stereodon chryseus Mitt. Journ. Linn. Soc. 8: 39. 1864. 
