polypodiacej:. 19 



briated paleae. Fronds tripinnate; the primary divisions distant and 

 spreading, the ultimate ones approximate. Bhachis, costa, and dicho- 

 tomous veins, on both sides paleaceous-hirsute, the bleached colour of 

 the paleae imparting a peculiar blanched aspect to the whole plant. 

 Sori small and numerous on the upper half of the frond, seated close to 

 the recurved margin of the segments. Sporangia brown, with very 

 short pedicels. 



4. ALLOSORUS, Bernh., J. Sm. 



(Pteridis, Spec. Linn. Cryptogramma, K. Br.) 



Allosorus acrostichoides. 



Cryptogramma acrostichoides, Hook. & Grev. Ic. Fil. t. 29; Hook. Fl. Bor.-Amer. 

 2, p. 264. 



Hab. Mount Rainier range, Oregon ; among loose rocks. 



We possess only the sterile fronds, and these are in a very young 

 state. 



5. NOTHOCHL^E N A, B. Br., Presl, 



(Acrostichi, Spec. Linn. Nothochljen^i, Spec. Kaulf. & Auct.) 



1. NOTHOCHL^NA SINUATA, Kaulf. 



N. rhizomate brevi repente; frondibus subbipinnatifidis ; pinnis ovatis 

 petiolatis, inferioribus pinnatis, superioribus pinnatifido-dentatis subtus 

 paleaceo-squamosis supra viridis parce hirsutis. 



Nbihochlsena sinuata, Kaulf. Enum. Fil. p. 135. 

 Acrostichum sinuatum, Willd. Spec. PI. 5, p. 120. 



Hab. Banos, Andes of Peru. 



N 



