3IO GEOLOGICAL SURVEY OF CANADA. 



from a broadly ovate-deltoid base rather suddenly constricted 

 into a narrow subulate acumen, plane on the margins, quite entire 

 or subdenticulate at the base of the acumen ; costa double, 

 short; cells narrowly linear, those of the angles few but distinct, 

 small, quadrate, greenish or pellucid. Fruit and flowers un- 

 known. 



Allied to H. hamulosum, Schimp., but more robust and distinct 

 by the light-green tint; the leaves broader at base and more sud- 

 denly constricted into a subulate acumen and the alar cells more 

 numerous and more conspicuous, much resembling the small 

 green form of H. cupres si forme, Linn., but in this the leaves are 

 narrower and the alar cells much more numerous and con- 

 spicuous. 



Seal Island, Labrador, 1893. (Waghorne.) 



1185. H. subeugyrium, REN. & CARD., Bot. Gaz.,Vol. XXII., 52. 



Monoecious, resembling H. eugyrium, Sch., var. MacKayi, Sch., 

 from which it differs by the alar cells of the leaves small, quadrate, 

 not forming excavate auricles and the capsule exannulate. From 

 the forms of H.palustre, Linn., having the leaves subimbricate, it 

 is distinguishable by the minutely denticulate apex of the leaves 

 and by the costa always double and shorter. 



Bay of Exploits, Newfoundland, 1893. (Waghorne.} On rocks 

 in a brook at Woodstock, N.B., July 3rd, 1899 5 on wet rocks, 

 Petawawa River, Algonquin Park, Ont., July 24th, 1900. (Macoun.) 



1186. H. orbicularicordatum, REN. & CARD., Bot. Gaz., Vol. 

 XXII., p. 52. 



Tufts very soft, pale lurid green above, discoloured whitish 

 yellow and brownish-variegated below. Stems slender, erect 

 4 9 cm. high, simple or sparingly branching, not radiculose, 

 cuspidate at apex. Leaves soft, erecto-patent or very loosely 

 imbricate, subundulate when dry, decurrent at base, broadly cor- 

 date-suborbicular, very obtuse, quite entire, slightly sulcate; 

 costa thin, vanishing far from the apex; areolation loose, pellu- 

 cid; cells soft, thin-walled, rhomboidal-hexagona! in the middle, 

 the marginal narrower, the upper shorter, the alar very loose, 

 large soft and empty. Flowers and fruit unknown. 



Depot Island, northwest shore of Hudson Bay, Lat, 63 59', W. 

 Long. 90 20' 1893. (George Comar.) 



