A. W. Evans — North American Sj)ecies of Frullania. 33 



the stem. Still, it has seemed better on the whole to group them 

 with F. Caroliniana^ as they agree with it in the following impor- 

 tant points : (1) the plane underleaves, (2) the autoicous inflorescence, 

 and (3) the position of the ? flowers. 



20. Frullania Caroliniana Snlliv., Muse. Alleg. n. 270. 1846. Amer. Jour. Sci. 

 and Arts, II. i : 74. 1846. 



Frullania brunnea Aust., Hep. Bor.-Amer., n. 105e. 1875 (not Spreng.). 



Plate XV. 



Autoicous : plants closely appressed to matiix, varying in color 

 from yellowish-green to reddish-brown ; sterile stems mostly bipin- 

 nate, fertile stems more irregularly branched : leaves closely imbri- 

 cated, the lobe ovate, arching over the stem but not cordate at base, 

 rounded and slightly decurved at the apex, entire ; lobule distant 

 from the stem and spreading at a wide angle (30°-40°), short-clavate; 

 stylus a small, obliquely spreading triangular process : underleaves 

 contiguous or imbricated, orbicular, plane, bifid about one-half with 

 obtuse or subacute lobes and sinus, entire or vaguely unidentate on 

 the sides ; branch-underleaves much narrower and with sharjDer points : 

 leaf-cells of lobes sometimes thick-walled with inconspicuous trigones, 

 sometimes thinner walled with conspicuous trigones and occasional 

 intermediate thickenings : 9 infloi'escence terminal on the stem or a 

 main branch ; bracts in three or four pairs, unequally bifid, the lobe 

 ovate, obtuse or apiculate at the apex, entire ; lobule shorter and 

 narrower, ovate, subacute, bearing on the inner edge near the base 

 a distinct tooth-like segment or stylus, otherwise entire ; bracteole 

 free or connate on one side with bract, bifid about one-third with 

 acute lobes and sinus, entire or nearlj- so ; perianth exserted about 

 one-third, obcuneate, abruptly narrowed into a short, setulose beak, 

 compressed on the sides and strongly unicarinate postically ; 5 spike 

 globose, occuj^ying a short lateral branch near the ? inflorescence, 

 bracts in one or two pairs. 



Stems 0-10™™ in diameter ; lobes of leaves 0-70'"™ long, 0-80""" 

 wide, lobule 0-20°^'^ long, O'lO"^"^ wide ; underleaves 0-40°"° long, 

 O-somtn wide; lobes of branch-leaves 0-30°^"> long, 0-40'"'^ wide; branch- 

 underleaves 0-20™™ long and wide; leaf -cells from edge of lobe O-OlY"^"', 

 from middle 0-01 S"'" in diameter, and from base 0-038"™ long, 0-023™=" 

 wide; bract I, lobe 1-25'"™ long, 0-75"™ wide, lobule 0-80™™ long, 

 0-40™™ wide; bracteole 1,0-80'"™ long, 0-40™™ wide, bract II, lobe 

 0-90™™ long, 0-57™™ wide, lobule 0-60™™ long, 0-30™™ wide, bracteole 

 II, 0-55™™ long, 0.35™™ wide; perianth 1*50™™ long, 1-20™™ wide. 



Trans. Conn. Acad., Vol. X. May, 1897. 



