186 
and broader ; alar quadrate, indistinct : dioicous ; inner perichaetial 
leaves sheathing at base, more or less abruptly narrowed into a 
filiform reflexed acumination, dentate above, ecostate. Sporophyte 
10-15 mm. high; seta red-brown, smooth; capsule red-brown, 
oblong, about 1.8 mm. long and less than half as thick, erect and 
symmetric ; operculum conic, apiculate ; annulus lacking ; segments 
of peristome attached to a narrow basal membrane, split between 
the articulations ; cilia single, rudimentary. 
. Type specimen on trunks and roots of trees in woods near 
Baton Bouge, La. (Dr. Joor). (Type seen ; specimens examined 
by Mueller were communicated to the Columbia Herbarium by Dr. 
Mohr.) 
B. biventrosum is closely allied to B. acuminatum, from which it 
is distinguished by its smaller size and by its very narrowly pointed 
leaves with fewer and indistinct alar cells. 
17. BRACHYTHECIUM CYRTOPHYLLUM Kindb. Ottawa Nat. 4: 63. 
1890. 
Gametophyte caespitose ; tufts glossy-green, usually densely 
intricate ; stems irregularly divided and branching; branches fili- 
form, subjulaceous, 5-10 mm. long; branch leaves open-erect, 
appressed-imbricate when dry, ovate to ovate-lanceolate, acute or 
short acuminate, 0.7 X 0.3 mm., serrulate, very concave ; margins 
reflexed below; costa extending 24-34 length of leaf; median 
cells fusiform, 4-8: 1; many basal cells shorter and broader ; 
quadrate alar cells numerous ; stem leaves broadly ovate, acumi- 
nate, O.7 X 0.4 mm. ; median leaf-cells 3-5 : 1: dioicous. Sporo- 
phyte unknown. 
Type locality, Brighton, Northumberland Co., Ontario, October 
6, 1888 (Macoun). Type seen. 
Roots of trees and old logs. Belleville, Ont. (Macoun) ; 
Waterloo, N. Y., Austin, 602 ; Hypnum (Brachythecium) julaceum 
sp. nov. (Ms. notes in Austin's herbarium.) 
| . Exsiccari.—Aust. PE Appal. 311. (Brachythecium acumi- 
natum var. setosum.) 
Closely allied to P. acuminatum, distinguished by its filiform 
stems and branches and small leaves with shorter cells. 
