1902] NOTES ON CERTAIN SPECIES OF ANTENNARIA 1 1 7 



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Antennaria neodioica Greene, Pittonia 3:184. 1897.- — A. 

 neodioica attenuata Fernald, Proc, Bost. Soc. Nat. Hist. 28:245. 

 1898. A.rupicola Fernald, Rhodora 1:74. 1899. A, ahi?wides 

 Greene, Pittonia 4 : 83. 1899, — This species was described from 

 specimens secured near Stroudsburg and Bushkill in the extreme 

 eastern part of Pennsylvania. Typically it has involucres whose 

 outer bracts are obtuse and the inner acute. True A. neodioica 

 is much less common than the forms with narrow, attenuate 

 involucral bracts. The staminate plants are certainly ver)' rare, 

 being unknown both to Mr. Fernald and myself. Professor 

 Greene, however, seems to have had some staminate plants when 

 drawing up the original description. 



Taken in its entirety, this species is readily separated from 

 any Antennaria to be found in eastern North America. It is 

 quite variable, and some of its forms have received sub-specific 

 or even specific names. Dr. Britton^ considers all the forms of 

 this particular category as representing only one species. In 

 this I think he is entirely right. I had myself, independently, 

 reached the conclusion that A. neodioica attenuata and A, alsinoides 

 are the same, and am now of the opinion that the form to which 

 these two names were applied cannot consistently be accorded 

 even sub-specific rank. 



An examination of a series of specimens from localities rang- 

 ing from Ontario and the New England states to Maryland 

 shows that the species varies chiefly as follows : basal leaves 

 from relatively narrow with oblanceolate expanded portion 

 and then not clearly differentiated into blade and petiole, to 

 rather broad, the expanded portion obovate with a more dis- 

 tinct petiolar base; inflorescence from somewhat paniculate to 

 subcorymbose, either closely congested or tolerably open ; bracts 

 from much acuminate to more or less obtuse, scarious or petal- 

 oid, rarely lemon-tinged. Were any two or more of these varia- 

 tions always associated, there would here be some justification 

 in recognizing sub-species. Professor Greene states that his A. 

 alsinoides as compared with the typical A. neodioica has its heads 



•Science, n. s. 13:587. 1901. 



