8 A. W. Evans — North American Species of IVullania. 



minute tooth or stylus at about the middle of its inner edge ; brac- 

 teole connate on one side, ovate, bifid with acute lobes and sinus, 

 otherwise entire ; perianth long-exserted, inflated or slightly com- 

 prised at sides, obovate, narrowed into a short, broad beak, with a 

 broad usually two-angled postical keel and often with additional 

 antical and postical ridges interposed : 6 bracts in about two pairs 

 occupying a short lateral branch near the involucre. 



Stems 0-1 0"™ in diameter ; lobes of leaves 0-45™"' long, O-SS"""* 

 wide, lobules 0.23'"™ long and wide ; underleaves 0-18""" long, 0-14™" 

 wide; leaf -cells from edge of lobe 0-013'"'", from middle 0-019°''" in 

 diameter, and from base 0-025™" long, 0*01 5""" wide ; bract I, lobe 

 0-55™™ long, 0-30™"' wide, lobule O-SS™"" long, 0-23"'™ wide ; bracteole 

 I, 0-45">'° long, 0-018™™ wide; bract II, lobe 0-45™™ long, 0*23™™ wide; 

 bracteole II, 0-30™™ long, 0-12™™ wide ; perianth 1-00™™ long, 0-65™™ 

 wide. 



On trees, mostly at high altitudes ; White Mountains, New Hamp- 

 shire (Oakes, Austin, etc.) : Mount Mansfield, Vermont (Farlow). 

 Distributed in Hep. Bor.-Amer. oi. 105c, and in Hep. Amer, w. ^5. 



This delicate little species seems to be quite local ; it has been col- 

 lected perhaps a half dozen times in the White Mountain region, 

 where it was discovered many years ago by Oakes, but I have seen 

 specimens from only one other locality. Except for its small size, it 

 would not be diflScult of detection ; its reddish color usually serves to 

 distinguish it from F. Ehoracensis, a very common mountain species 

 at lower altitudes, and there is little danger of its being confused 

 with F. Asagrayana, the only other species found in the White 

 Mountains. Aside from its color, F. Oakesiana differs from F. 

 Fboracensis in its autoicous inflorescence, in the areolation of its 

 leaves, in its large lobule, and in the additional ridges on its perianth. 



3. Frullania Bolanderi Aust., Proc. Acad. Phila. for 1869: 226. 



Plate II. 



Frullania Petalumensis Gottsche in Bolander, Catalogue of the Plants growing in 

 the vicinity of Sau Francisco, 1870. 



Frullania Hallii Aust., Bull. Torrey Bot. Club, vi : 20. 1875. 



Dioicous: plants closely appressed to matrix, dark green, varying 

 to reddish : stems irregularly pinnate, the branches often prolonged 

 at right angles to the matrix as flagella without leaves, except a few 

 toward the extremity, and with squarrose underleaves : leaves distant 

 or subirabricated, the lobe ovate, somewhat squarrose when moist, 

 arching over the stem but not cordate at base, rounded at the apex ; 

 lobule large, galeate, truncate at base, close to the stem ; stylus 



