224 BULLETIN OP THE UNIVERSITY 07 WISCONSIN. 



FONTINALIS, p. 268.1 ^ 



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



Branch leaves 8-16 times as long as broad . F. chiysophylla, S83. 



Branch leaves 2.5-5 times as long as broad . F. Eliadbergii,' 381. 



II. Leaves hom,omorphous.' 



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



Plants shining with golden or copper luster. 

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



Stem soft, much branched .... F. Californica, 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. NoTse-Angrliae,^ 270. 

 Female flowers rare, at bsise of stems . . F. biformis, 270. 



B Leaf cells long linear {1 : 7-SO). 

 I. Leaves auricled. 



[V. Iieseurii 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, S95. 



CucuUate and terminated by an acumen . . F. involnta, 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. 



1 Eevised by Cardot, Mem. Soc. Nat. d. Sci. Nat. et Math, de Cherbourg 88: 1-152. 1892. 



'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. Kijidbergii. See also Appendix, no. 382. 



' In J?". biformU the summer leaves are unlike the vernal, so that specimens collected 

 jnst as the vernal are falling might deceive. 



« See Appendix, nos. 377, 378. 



'See Appendix, nos. 386, 387. 



