78 



District 5. — This district consists of that portion of the state 

 of Pennsylvania within the 100 mile radius and that portion of 

 the state of New Jersey, north of a straight line extending from 

 Perth Amboy southwest to Trenton. The station is Closter. 



District 6. — This district consists of all that part of the state 

 of New Jersey south of a straight line extending from Perth 

 Amboy southwest to Trenton and north of the 100 mile radius. 

 The station is Newfield. 



Authorities 



Tuckerman is held as the authority in compiling this list for 

 various reasons, the most important of which are the following: 

 (i) He was and is our foremost American authority. (2) He 

 was thoroughly conversant with American forms and conditions. 

 (3) His descriptions, though from some standpoints obscure, are 

 much clearer in their application to American lichens than those 

 of European authorities. For purposes of comparison, the speci- 

 mens in the herbarium of the New York Botanical Garden were 

 accepted as correctly identified, only on such good authority as 

 that of Leighton, Willey, Miss Clara Cummings, and Bruce 

 Fink. 



All recent and accepted changes in nomenclature occurring 

 since the death of Tuckerman are included. Several genera 

 {Acolium, Graphis, Calicium, etc.) have been identified under 

 other authorities, principally Nylander and Fries. 



Abbreviations 

 In preparing a list of this length, many repetitions necessarily 

 occur, as regards stations, habitat, and authority. Conse- 

 quently, after their first insertion, such are abbreviated. 



I. Order: GYMNOCARPI (Schrad.) Fr. 



= GYMNOCARPALES (Luyken) Fr. 



Sub-order: CYCLOCARPINEAE (Wain). 



I. Group: Radiatae Hue 



Family i. Usneei = Usneaceae Eschew. 

 Genus i. Usnea barbata (L.) Fr. Closter, N. J. Common, trees. 



= composite material. 



