﻿Underwood : The ternate Species of Botrychium 531 



"Eineneue Art habe ich aus Virginien erhalten, die ich Botrychium dissectum 

 nenne. Der Wedel ist dreyfach getheilt und fast dreyfach gefiedert ; die Blattchen der 

 zweyten Ordnung sind lanzetformig, stumpf und theilen sich in Keilformige, stumpf 

 gekerbte oder eingeschnittene Lappchen. Die Fruchtahre ist fast dreyfach gefiedert. 

 Mit dem Botrychium Virginicum kommt diese Art einiger Massen uberein, nur dass 

 bey jenem die Blattchen der zweyten Ordnung spitzig zulaufen und in spitzig eingeschit- 

 tene Lappchen getheilt sind. Michaux hat (Flor. boreali-americ. vol. II., p. 274), 

 einen Botrypus lunarioides der mir dieser neuen Art in der dreyfachen Eintheilung des 

 Wedels und der Aehre uberein kommt, aber er unterscheidet sich durch die rundliche 

 Nierenform der Blattchen " 



the 



is fairly good, and it indicates very clearly a species that is found 



very common in the vicinity of New York city, and thence south- 

 ward, extending in the interior to Ohio, southern Indiana, and Ken- 

 tucky. It is also found in various New England states, having 

 been collected as far northeast as Essex county, Massachusetts, by 

 Mr. John Robinson, but the typical form does not appear to be as 

 common in New England as farther southward, particularly inland 

 from the Atlantic coast. The species was well known to 

 now, Pursh, Muhlenberg, Greville and Hooker, and by them prop- 

 erly recognized as a good species. It was fairly well figured by 



Willde 



Schkuhr in 1 



t 



latter from a young or imperfectly developed specimen. Willde- 

 now's herbarium contains a single rootless plant of this species 

 sent by Muhlenberg, which is exactly typical of the species as 

 known from New York southward. 



This species reaches its fullest development in moist shady 

 woods ; a specimen in my collection from Whiteplains, New 

 York, having a sterile lamina 22 cm. wide by 14 cm. high. The 

 primary and secondary pinnae are cut down to a narrowly winged 

 rachis scarcely more than a millimeter wide, and the pinnately ar- 

 ranged segments emerge alternately from this rachis by a lamina 

 perhaps 2 millimeters wide, breaking up somewhat palmately 

 into narrow tooth-like divisions which fork repeatedly and end 

 normally in two divergent teeth. The stem is usually very short 

 2-2.5 cm.), the petiole of the sterile lamina is 7.5 cm. or less, the 

 petiole of the sporophyll is 24 cm. or less long. 



Kryptog. Gewachse. //. 7j<?. 

 "f Ferns of North America, i ://. 20, f. 1. 



