294 48 



Cuba: El Guama, Prov. Pinar del Rio, Wm. Palmer & Riley n. 137 (1900) (HH). 

 Jamaica; Middleton, Stengel (HR). - Mt. Airy, W.R.Maxon n. 855 (HC). — 

 Banks of Ginger River, W. R. Maxon n. 828 (HC). 

 Puerto Rico, Balbis (HB). 



var. Gonzalezii Christ n. var. 



Mexico: Cerro de S. Felipe, Oaxaca 2000 m., Gonzalez X. 1900 (HC). 



Habitu typo omnino similis, differl: lamina glaberrima, subtus eglandulosa. 



This species, evidently very common in Central America, has during the last 

 half century been referred to D. opposita by all pteridologists with exception of 

 FouRNiER, who named it Aspidium exsudans (Liebm.), under which specific name 

 Liebmann's specimens were distributed. Fouhnier has, however, overlooked, that 

 LiEBMANN had published the species as Polypodium litigiosum; probably he has 

 changed the name in the proof, as the name "exsudans" is to be found in two 

 places in the notes accompanying the diagnosis. I have called the species Dryo- 

 pteris litigiosa (Liebm.) C. Chr. on the labels of the numerous specimens seen by me, 

 but having recently seen the type specimen of Nephrodium panamense Presl through 

 the kindness of Dr. E. Bayer, curator of the "Museum des Königreiches Böhmen" 

 of Prague, it became necessary to change the name to panomensis and reduce 

 P. litigiosum Liebm. to a mere synonym, because the plant of Presl belongs to 

 the same species. 



Although D. panamensis resembles D. opposita in some respects, in its densely 

 glandulose under surface and its enlarged basal segments, it is in its most developed 

 form a very distinct species, in habit totally dilïerent from D. opposita, and also 

 differing from this in its much longer and broader pinnæ, its much longer and 

 often falcate segments with more veins, in. its thinner texture, its rarely exactly 

 opposite pinnæ, and in its proportionally few, distant reduced pinnæ, the lower- 

 most not being very small, but as a rule ligulate. 



Polypodium gracilentum Jenman, Bull. Dept. Jamaica 4: 129. 1897; Dryopteris 

 gracilenta C. Chr. Ind. 268. 1905 seems to me ex descriptione to be this species. 



29. Dryopteris silviensis Hieron. Hedwigia 46: 330 tab. 5 fig. 7. 1907. 



Type from Columbia: prope Silvia, leg. Stiibel n. 140 part. (HB!). 

 Rhizome wanting. Leaf downwards suddenly narrowed with about 9 pairs of 

 auriculiform or even glanduliform pinnæ. Sporangia glabrous. 



30. Dryopteris delicatula (Fée) C. Chr. 



Syn. Phegopteris delicatula Fée, 11 mém. 51 tab. 20 fig. 1 1866. 



In HB and HC are to be found two specimens from Guadeloupe, leg. L'Her- 

 minier, determined by Fée as Phegopteris hydropbila Fée, 11 mém. 56 tab. 13 fig. 3; 

 a similar specimen from the same island was collected by Maze n. 916 (HC). Com- 

 paring these specimens with Fee's figures and descriptions I find that they can not 



