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phila in having rather smaller leaves and mostly dioicous flowers, the ^ 

 plants being more branching than the ? and bearing three or four antheri- 

 dial buds ; paroicous plants occur, however, and there seems to be no reason 

 for considering it other than a variety as above given (519). 



Cynodontiuin torquescens (Bruch) Limpr. Lake Lindeman, on thin 

 earth over rock. Dawson, on rock. Leaves papillose, up to 3 mm. long, 

 twice longer and much narrower-pointed than in alpestris. Inner perichse- 

 tial leaves longer-pointed and less clasping than in gracilescens, foliage 

 leaves also narrower above. The perigonium, of two leaves, close under the 

 perichsetium or almost at its side (526). 



Qynodo7itium stru7niferu??t(E\iYh..) DeNot. Lake Lindeman. In crevices 

 of rock (528). 



Oncophorus virefts nigrescens (Schimp.). {Cyjtodontm7Jt virens nigres- 

 cens Schimp.) A" depressed, blackish variety growing on the margin of an 

 alpine pond just below snow banks about 1000 ft. above Lake Lindeman 

 (791). 



Dicramim angustinn Lindb. Sterile specimens collected at Lake Linde- 

 man in swamps and found in good fruit at Dawson in July. This is a more 

 slender plant than scopariinn with erect-spreading, nearly straight, smooth 

 and entire leaves, giving a somewhat bristly appearance to the stems. The 

 leaf-cells are elongated throughout often from 4 to 8 times longer than wide 

 in upper leaf, with walls strongly porose, at least below. Nerve indistinct 

 and narrow a short distance above base. Perichsetial leaves abruptly nar- 

 rowed to a smooth subula about \ the length of blade. Capsule short, curved, 

 furrowed. Annulus of one or two rows of cells. Spores slightly roughened, 

 up to about .023 mm. Kindberg gives this as a plant of northern Europe, 

 occurring principally in Norway, Finland and Lapland (539). 



Dicranum niajus orthophyllum Al. Br. Fruiting specimens collected 

 at Lake Lindeman. This variety with nearly straight, erect-spreading 

 leaves bears little resemblance to the beautiful falcate-leaved majus. The 

 leaves of the Lindeman specimens measure up to 8^ mm. long, with mar- 

 gins serrulate in upper \ and vein somewhat rough on back with low 

 papillae. Leaf-cells elongated throughout and porose nearly to apex, costa 

 percurrent, .045 to .080 mm. wide a little above the broadened base. Cap- 

 sules clustered, up to 5 in the same perichsetium (544). 

 Ditrichtan giganteuin R. S. Williams, sp. nov. 



Dioicous. Growing in large cushions up to 12 cm. high, usually of a 

 yellowish-green color. Upper stem leaves up to 7 mm. long, narrowly sub- 

 ulate above, sharply denticulate at apex and more or less serrulate or crenu- 

 late on border about \ down, also often rough on back above. Inner 

 perichsetial leaf truncately narrowed to a denticulate subula about equaling 

 the broad part in length. Cell walls thickened throughout except in and 

 near margin at base. Cells in upper leaf 3-5 times longer than wide with 

 rounded ends, in middle near margin, short and irregular, often not or 

 scarcely elongated, toward base several rows in margin narrowly rectangu- 

 lar, 8-10 times longer than wide, with thin walls, within the cells become 



