150 Lloyd and Underwood : A Review of the 



Howell, at Yes Bay, Aug. 21, 1895 (N), and another in the same 



locality Aug. 26, 1895, by M. W. Gorman. Slender-leaved ma- 



terial comes also from Kadiakls. (R J. Bretherton, July 23, 1894). 



Specimens from the Cascade Mts., Washington, Macdonald 



■ 



Lake, Montana, and Twin Lakes show but little differences, the 

 leaves ranging from 1.5 x 4-8 mm. to 0.8 mm. x 5 mm. Speci- 

 mens from the Northeast, show considerable variation. The forms 

 with the most slender leaves come from the mountains of Vermont, 

 growing in a 'moist, shaded habitat (A. J. Grout, Mt. Mansfield). 

 These facts, together with the variability found in the moist climate 

 off the Alaskan coast, would indicate that the slender form of the 

 leaf is induced by a wet, shaded habitat. 



Other specimens collected by Dr. Grout, at Mt. Mansfield, 

 whether in the shade or not is not stated, have somewhat broader 

 leaves. Plants of Mr. G. G. Hinsdale's collection of the * 4 summit 

 of Mt. Mansfield" (1893) are typical in form, with shorter and 

 broader leaves. 



» 



Distribution : Greenland, Labrador, Newfoundland, Maine, 

 New Hampshire, Vermont, New York, North Carolina, Idaho, 

 Washington, Alaska, St. George Island (Behring Sea). A plant 



Selago is represented by specimens as follows : 



g from L 



Idaho : Little North Fork Basin " mountain woods," Sept., 



>5, J. B. Leiberg (N). 



Alaska : Sitka, F. Bischoff (N). 



Canada : Mud Lake, July, 1891, F. F. Wood (NV 



2. L. porophilum sp. nov. 



Prostrate portion of stems short, abundantly rooting, curving 

 upwards, then dichotomously branching 1-3 times to form a rather 

 dense tuft (4-10 cm. high) of vertical stems, densely clothed 

 with spreading or reflexed leaves : leaves ( 7-9 mm. x 1 mm.) very 

 slightly broadened above the middle and similarly contracted to- 

 ward the base, those between the strobilar regions shorter {6-7 

 mm.), broadest at the base but very gradually tapering, entire or 

 veiy minutely denticulate : sporangia compressed reniform : spo- 

 rophylls minutely denticulate above the middle or entire, acumi- 

 nate (4-5 mm. x 1 mm. wide at base) : plant often gemmiparous. 



A plant intermediate in habit between L. litcidulumzxiA X. Selago, 



