224 BULLETIN OF THE UNIVERSITY OF WISCONSIN. 



FONTINALIS, p. 268.1 



I. Leaves of branches unlike stem leaves (dimorphous). 



Branch leaves 8-16 times as long as broad . F. chrysophylla, 883. 

 Branch leaves 2.5-5 times as long as broad . F. Kindbergii, 8 381. 



II. Leaves homomorphous.* 



A. Leaf cells rhombic-hexagonal (1: 6 or less). 



Plants shining with golden or copper luster. 



Stem robust, little branched . F. antipyretiea gigantea, 4 269. 



Stem soft, much branched .... F. Galifornica, 269. 

 Plants dull, yellowish to dirty green. 



Leaves with one edge reflexed near base . F. antipyretiea, 268. 

 Leaves with margin plane. 



Female flowers abundant, in most leaf axils F. Novae- Anglise, 5 270. 

 Female flowers rare, at base of stems . . F. Mformis, 270. 



B Leaf cells long linear (1 : 7-30). 



i. Leaves auricled. 

 [F. Z/escurii and F. Neo-Mexicana may be sought here.] 



Alar cells very large F. flaccida, 393. 



Alar cells moderately enlarged. 

 Leaves inflexed on the borders. 



Gradually acuminate .... F. dichelymoides,#P5. 



Cucullate and terminated by an acumen . . F. invol uta, 389. 



Obtuse, neither acuminate nor cucullate . . F. Cardoti, 388. 

 Leaves plane on the borders, acuminate. 



Transverse bars of the endostome complete . . F. tenella, 391. 



Transverse bars of the endostome incomplete . . F. nitida. 390. 



i Kevised by Cardot, Mem. Soc. Nat. d. Sci. Nat. et Math, de Cherbourg 28: 1-152. 1892. 



8 It has not been deemed advisable to maintain F. Howellii as a distinct species. 

 Following the suggestion of Cardot, Monog. Fontin. 67, it is ranked as a variety of 

 F. Kindbergii. See also Appendix, no. 382. 



3 In F. biformis the summer leaves are unlike the vernal, so that specimens collected 

 just as the vernal are falling might deceive. 



4 See Appendix, nos. 377, 378. 

 * See Appendix, nos. 386, 387. 



