YJ2 The Philippine Journal of Science 1916 



vestita castanea; pinnis medialibus maximis, 13 cm longis, 2 cm 

 latis, imbricatis, acuminatis; segmentis infimis liberis adnatis, 

 aliis anguste confiuentibus, 3-4 mm latis, plerumque ob margines 

 involutas angustis, obtusis, integris, rigide coriaceis, superne 

 pilis inferne pilis et paleis angustis fere hyalinis sparse pubes- 

 centibus; venis immersis, nigris, trans sorum plerumque sim- 

 plicibus ; soris apices segmentorum fere attingentibus, linearibus, 

 indusiis atrocastaneis. 



Kauai, near summit swamp of Waialeale, altitude 1550 meters, legit 

 Rock. September, 1909. 



This may be the Sadleria pallida of Hillebrand and of Christensen's 

 Index, but not S. pallida H. & A., of which Hooker 3 says, "It is clearly 

 a trifling variety" (of S. cyatheoides) , and the Synopsis (p. 18) readc 

 "The original S. pallida, H. & A., is a mere form with a paler rachis." 

 Compared with Hillebrand's description, this plant differs in being very 

 dark green above, with veins not prominent though somewhat conspicuous, 

 and sori long and narrow. 



Beside a number of specimens from Kauai, Rock sends one from the 

 Haalelepakai Ridge, Lanai. 



PTERIS HILLEBRANDII sp. nov. 



Eupteris adspectu hybridis P. creticae et P. irregularis; cau- 

 dice et basi stipitis paleis atrocastaneis nitidis linearibus dense 

 vestito; stipite 30-50 cm alto, stramineo vel castaneo, nitido; 

 fronde 25-40 cm alta, deltoidea; pinnis infimis maximis, stipi- 

 tatis, ad alam angustam in segmenta pauca linearia deorsum 

 integra apicibus serrulatis pinnatifidis, segmento basiscopico 

 basale solummodo deorsum pinnatisecta lobis paucis; pinnis se- 

 quentibus adnatis, 1- vel 2-paribus, suboppositis, paucilobatis ; 

 rhachi super pinnas descriptas alata, segmentis superioribus 

 frondis paucis falcatis anguste linearibus, segmento apicale ad 

 basin paucilobata, sursum integra (cauda serrulata excepta), 

 anguste lineare. 



Kauai, forests of Kaholuamano above Waimea, in semi-wet region; Rock 

 5984, 5988. 



This is Pteris irregularis Kaulf. var. linearis Hillebrand. 4 Hillebrand's 

 varietal name cannot be used specifically, but the plant is very distinct. 

 Pteris irregularis is indeed a very variable fern, as Hooker 5 notes; but 

 even in the simplest forms it shows no tendency, in the many specimens 

 available for study, toward the very long, entire segments of Pteris Hille- 

 brandii. In appearance the latter suggests Pteris heteromorpha Fee, a 

 smaller fern, even less divided, with finer paleae. Agardh ' makes a similar 

 observation regarding Pteris irregularis and P. semipinnata L. 



3 Sp. Fil. 3: 66. 



4 Flora Hawaii 628, from E. Maui. 



5 Species Filicum 2: 173. 

 ' Recensio, 19. 



