228 BULLETIN OP THE UNIVERSITY OF WISCONSIN. 



PTERIGYNANDRUM, p. 288. 



Branch leaves acute, serrate or denticulate at the apex 



only P. flliforme,! 280. 



Branch leaves acute or acuminate, denticulate nearly all 



around P. papillosulum, 405. 



PTEROGONIUM, p. 289. 



Leaves broadly oblong-ovate or obovate, acute, smooth P. gracile, 290. 

 Leaves broadly deltoid-ovate, narrowly acuminate, papil- 

 lose P. brachypterum, 290. 



ANTITRICHIA,2 p. 290. 



Capsule oval (1 : 2-2.5), leaf cells fusiform . A. cartipendula, 291. 



Capsule cylindric (1 : 6), leaf cells oval . . A. Californica,' 291. 



HOOKERIA, p. 292. 



Leaves bicostate to middle (not papillose?) . . H. varians, 292, 



Leaves bicostate to apex, papillose . . . . H. crnceana, 292. 



Leaves ecostate, entire (not papillose?) . . . H. SuUiTautii,* 293. 



FABRONIA, p. 294. 



Leaves ciliate-dentate. 



Peristome of 16 teeth, costa none or very short . F. piisilla, 294. 



Peristome none, leaves costate to middle . F. gyninostoma, 294. 



Peristome of 8 geminate teeth, leaves costate nearly 



to middle F. octoblepliaris, 295. 



Leaves serrate to subentire. 



Sharply serrate, teeth orange, spores about 11// . F. Wrightii, 295. 



Obscurely serrate, teeth brown, spores about 17// F. Ravenelii, 295. 



Obscurely serrate, teeth with prominent articulations 

 on back F. Donnellii, 295. 



1 See Appandix, no. 404. 



^ A sterile species, A, tenella, Appendix, no. 406a, is probably referrable to one of the 

 two species here given. 



^ See Appendix, no. 406. 



* "Die Hookeria Sullivantii mihi unterscheide ich auch heute noch von H. lucens und 

 ebenso von H. acuti/olia aus Indien."— C. MuUer, in litt. ad E, G. Britton, 18 Jul. 1888. 



