THE FERNS OF NICARAGUA. j^j 



This name is used with some hesitancy. Twelve fronds 

 only were collected, and of these some are almost exactly 

 like the figures of pi. cxv in Icon. Fil.. not only in form, size 

 and division, but also in texture, and in the position and form 

 of the involucres, and the character of the marginal hairs. 



The form should, it seems, rather be compared with T. 

 krausii H. & G. from which it differs in the size and closer 

 texture of the frond, and by its more exserted, larger- lipped, 

 and more tapering involucres. 



In our specimens the lower part of the rachis is hairy, like 

 the stipe, and upon one specimen there are fifteen sori, the 

 average being about five. 



The rather scant material prevents a wider study of the 

 form, and Baker's disposition of the case is adopted for the 

 present. 



Rather common at Camp Menocal, creeping about on the 

 trunks of small trees. 



T. ■pusillum (including T. qucrcifolium) is reported from 

 Chontales. Nicaragua, by Hemsley {ibid.). 



5. T. krausii H. & G. 



Hook, et Grew, Icon. Fil., pi. cxlix;1 Hook., Sp. Fil., vol. 1, p. 120; Hook, 

 and Bak., Svn. Fil., p. 77; Hemsl., Biol. Cent. Am., vol. in, p. 602. 



Didymoglossum krausii Presl, — Fourn., Sertum Nic, p. 249. 



Our specimens agree with the plate in Iconcs Filiciun, both 

 sessile and stipitate fronds occurring on the same rootstock. 

 The stipes in some specimens are one-half inch long. The 

 base of the frond varies from broadlv truncate in the sessile 

 forms, to narrowly cuneate in those which are stipitate. One 

 specimen has the cup of the involucre and the adjacent margins 

 of the frond denselv ciliated with short whitish hairs in addition 

 to the sparse stellate hairs which occur in the sinuses. 



Common, creeping on the trunks of small trees in the deep 

 woods in the vicinity of Castillo. 



Reported by Fournier from Nicaragua without locality. 



1 The plate is marked T. iiicisuw, but the name T. krausii is used in the 

 text. 



