Underwood: American ferns 197 



pinnate, borne on stalks 8-10 cm. long; pinnae 18- (or .more) 

 jugate, those of the upper portion lanceolate, 6-12 cm. long, 10- 

 12 mm. wide, cuneate at the base, or long-tapering to a bordered 

 stalk, irregularly and usually coarsely dentate, acute or acuminate 

 at the apex, those of the lower portion of the leaf gradually re- 

 duced, the lowest becoming: ovate or ovate-triangular. 1-2 cm. 



^ v.mv. wx vsvciiv. titan 



long; rachis winged especially when young, stramineous; midrib 

 prominent, lateral veins oblique, simple or rarely forked about 1 

 mm. apart; sporophyls pinnate, the pinnae 6 cm. or more long, 5 

 mm. wide, borne on a short (3 mm.) stalk, midvein conspicuous, 

 lateral veins distant, simple or usually forked at the base with the 

 branches widely diverging. 



Specimens have been examined as follows : 



Cuba: 1822, Poeppig ;* Wright pyj (type, in herb. D. C. 

 Eaton " scandente arbores Citri ad 10 ped. in sylvis "). 



Hispaniola : " San Domingue " without collector or nearer 

 locality, in herb. Mus. Paris ; Plaisance, Nash & Taylor 1492. 



Porto Rico : Balbis, Schwanecke. 



Florida: Between Cutler and Longview Camp, 1903, Small 

 & Carter £36, ujy ; Ross' Hammock, Dade County, A. A. 

 Eaton 677. All the Florida plants seen are sterile, but have the 

 unmistakable foliage of this species. 



The genus Stcnochlacna thus added to our flora is related to 



iithiopti 



simply pinnate leaves, but lacks 



an indusium ; the sporangia soon become confluent on the narrow 

 pinnae of the sporophyls and on this account the genus was 

 merged by Hooker with Acrostic hum , with which, however, it has 

 no natural alliance. The Florida plants scarcely represent the 

 norm of the species and apparently are straggling plants instead of 

 climbing ones, as in more tropical forests. 



Dryopteris aquilonaris Maxon, Bull. Torrey Club 27 : 638. 

 1900. (Type from Cape Nome, Alaska, Flett.) 

 Alaska : Once collected. A near relative of Dryopteris fragrans. 



Dryopteris pittsfordensis Slosson, Rhodora 6: 75. 1904. 

 (Type from Pittsford, Vermont, Slosson) 

 Described as a hybrid of D. spinnlosa and D. marginalis. 



Poeppig's specimens were referred by Kunze (Linnaea 9 : 59. 1835) to Lt maria 

 longifolia Kaulf. and it was on the incorrectness of this determination that Presl wrote 

 " Olfersia Kunzeana (Loman'a longifolia Kunze nee Kaulf.) " in 1836 (Tent. Pterid. 

 2 35)- We have seen Poeppig's plants both at Prague and Vienna. 



