216 May on A New Fern from Porto Rico. 



Type in the U. S. National Herbarium, No. 40,035, being No. 2240 of 

 Sintenis' Porto Rican plants; collected at Cayey, October 5, 1885. The 

 type specimen is the only representative in the National Herbarium of the 

 several numbers cited by Krug. Other Porto Rican specimens are : Goll, 

 No. 342, and Heller, Nos. 536 and 6095. A single Cuban plant in the 

 D. C. Eaton herbarium we also refer here. 



Of the true P. rhizophyllum* we have seen excellent specimens from 

 Jamaica, the type locality ; and the illustration of a Jamaican plant by 

 Hooker and Grevillef is thoroughly characteristic of these. The compar 

 atively short broad tapering apices, as figured, offer a very noticeable dif 

 ference to the uniformly linear long-attenuate extremities of P. Krugii. 

 The Guadeloupe plant cited by Krug (1. c.) under rhizophyllum we have not 

 seen. 



* Poly stich urn rhizophyllum (Sw.) Presl, Tent. Pterid. 82. 1836.. 



Polypodium rhizophyllum Sw. Prodr. Veg. Ind. Occ. 132. 1788. 



Aspidium rhizophyllum Sw. Schrad. Journ. Bot. 18002 : 31. 1801. 

 t Hooker and Greville, Icones Filicum 1 : pi. 59. 1829. 



