191 
more loosely areolate at base, less conspicuously serrulate, 1.2 
X 0.8 mm.: monoicous ; perichaetium 2—2.5 mm. long, sheathing ; 
leaves slightly or not at all reflexed at apex, oblong-ovate, thinly 
costate, very loosely areolate, rather abruptly contracted into a 
long filiform flexuous acumination, slightly denticulate or entire. 
Sporophyte 15-20 mm. high; seta red-brown, smooth; capsule 
brown, oblong-arcuate, subhorizontal, 2-2.5 mm. long, 3:1; 
operculum long-conic, apiculate ; segments shorter than the teeth ; 
“cilia nodulose, not appendiculate, annulus none." 
Type locality, McKay's bush, Ottawa, Ont., Oct. 12, 1889, 
(Macoun); Canaan Forks, N. B., 1889, (J. Moser). On rocks. 
Authentic specimens from McKay's bush have been carefully 
studied. The species is entirely distinct from 4. oxycladon. It is 
distinguished from that species by the shorter and shorter acumi- 
nate leaves, shorter leaf-cells, more numerous quadrate alar cells 
and shorter capsule. In general appearance it resembles B. Novae 
Angliae, but it is easily distinguished by its being monoicous and 
having a large area of clearly differentiated quadrate alar cells. 
Its microscopic characters place it clearly in the section with B. 
populeum from which it is distinguished by the broader branch 
leaves with shorter costa and by its smooth seta. 
21. BRACHYTHECIUM REFLEXUM (Starke) Br. & Sch. Bryol. Eur. 
fasc. 52-54. pl. 539. 1853. 
Hypnum reflexum Starke; Web. & Mohr. Bot. Taschenb. 306 
and 476. 1807. 
Leskea laxifolia Hook. Musc. Exot. M. 30. 1818. 
Hypnum laxifolium Schwaegr. Musc. Frond. Suppl. 2, 1 : 159. 
pl. 143. 1824. Lesq. & James, Man. 342. 1884. 
Hypnum subtenue James, Proc. Acad. Phila. 1855: 447. 1855. 
Rigodium reflexum Kindb. Laubm. Schwed u. Norway, 14. 
1883. | 
Eurhynchium reffexum Kindb. Can. Rec. Sci. 1894: 22. 1894. 
Gametophyte in wide, loosely intricate, dark green mats (oc- 
casionally yellow-green in sunny places) ; stems filiform, 5—10 cm. 
long, arcuate-procumbent, radiculose at points of contact with sub- 
stratum, pinnately branching ; branches filiform, about 5 mm. 
long, ascending, terete-foliate, attenuate at apex, not radiculose ; 
branch leaves erect-open, loosely appressed-imbricate when dry, 
