of the Hawaiian Islands. 25*7 



bidentate with sub-equal divergent teeth ; leaves of flagell* minute, 

 mostly bidentate. 



Leaves 0.8""'" long, 0-45""" wide ; cells of leaves averaging O-OIS™"" 

 in diameter. 



P. frondescens Nees, Syn. Hep. p. 31. East Maui (Baldwin, 5, 85!). 



P. Gaudichaudii Mont, et Gottsclie, Annal. des Sc. Nat. 4me serie, T. vi, p. 193 

 {P. tenuis Mont, non Lindenb.). Hawaiian Islands (Gaudichaud, Andersson). 



P. Baldwinii Aust. Ms. {P.flava Ausl. Ms). West Maui (Baldwin, 115!). 



Loosely cjespitose, brownish-yellow, robust ; stems simple or spar- 

 ingly branched ; leaves sub-imbricated, ovate, slightly curved, the 

 margins entire or a little undulate, the dorsal decurrent ; the apex 

 rounded, usually bearing from one to three sharp teeth. 



Stem 5-8'='" long ; leaves 2-2-5'"° long, !"■" wide ; cells 0-02'7™'" in 

 diameter. 



P. fissidentoides Tayl. Syu. Hep. p. 636. Hawaiian Islands (Menzies); West 

 Maui (Baldwin, 95). 



P. adiantoides Lindenb. Syn. Hep. p. 38. Oahu (Mann and Brigham). 



P. deflexa Mont et Gottsche, Annal. des. Sc. Nat. 4me serie, T. vi, p. 192 (P. 

 patuJa Mont, non Nees et Mont. ; P. patens Aust. Ms.). Hawaiian Islands (Gaudi- 

 chaud); West Maui (Baldwin, 60!). 



P. Owaihiensis Nees et Lindenb. Syn. Hep. p. 46. Hawaii (Herb. Hook.);^ 

 Oahu, West Maui, Kauai (Baldwin, 160! 201 ! 206!). 



P. Eatoni Aust. Ms. West Maui (Baldwin, 1091). 



Stems mostly simple ; leaves opposite, loosely imbricated, spread- 

 ing, slightly unsymmetrical (the leaves on one side being more 

 obliquely inserted than on the other), orbicular-ovate, entire, the 

 dorsal margins decurrent, the ventral connate at insertion. 



Stems 10-12''" long ; leaves l-,5-2'"'" long, 1-1 •S™'" wide, P. 

 Eatoni is apparently a near ally of P. Brauniana Nees (Syn. Hep. 

 p. 51, n. 70) but the leaves are distinctly imbricated and somewhat 

 longer than they are broad, 



P.lOppOSitifolia Aust. Bull. Torr. Bot. Club, v, p. 16. Hawaiian Islands (Hil- 

 lebrand); West Maui (Baldwin, 93! 97!). 



P. biserialis Lehm. et Lindenb. Syn. Hep. p. 53. East Maui (Baldwin, 210!). 



P. deltoidea Lindenb. Syn. Hep. p. 55. West Maui (Baldwin, 1981). 



P. aCUtiuSCUla Aust. Ms. West Maui (Baldwin, 116!). 



Pale brownish-green, cjespitose, glossy ; stems simple ; leaves 

 imbricated, spreading, ovate, the margins entire exce])t at the apex. 



