Benedict : New hybrids in Drvopteris 49 



scales; laminae lanceolate, elliptical or oblong, acuminate, bipin- 

 nate or nearly tripinnate ; pinnae lanceolate or oblong-lanceolate 

 to narrowly deltoid, acuminate, rather flexuose, pinnate below; 

 pinnulae oblong or lanceolate, usually blunt and rounded, entire 

 to deeply pinnatifid or sometimes nearly pinnate on the lowest 

 pinnae, the margins entire or dentate, the teeth blunt, entire or 

 tipped with a few very short patent spinules : sori nearer the mar- 

 gins than midveins, the indusia coriaceous, convex, glandular. 



Type in the Underwood Fern Herbarium, New York Botan- 

 ical Garden; Benedict^ near Solvay, N. Y., Aug. 9, 1905. Also 

 collected by Underwood near Cambridge, Mass., Oct II, 1890; 

 Dowell J 6 22, New Springville, Staten Island, N. Y,, Nov. 2/, 

 1904; and Wiftsloiv^ Barton Landing, Vt, July 23, 1908. 



D. intermedia x marginalis, as represented in the material ex- 

 amined, constitutes a veiy uniformly distinctive plant, which differs 

 from the nearly related x D. pittsfordensis * in its obtuse pinnulae 

 and segments, in its spreading flexuose pinnae, and in its glandular 

 indusia. The material collected by Professor Underwood is more 

 divided than the rest and in this respect perhaps shows a greater 

 predominance of D. intermedia characters. In Dr. DowelTs col- 

 lection cited above, some of the pinnulae are more or less acute, 

 but the variation is slight The hybrid is one of the most easily 

 recognized in the whole series. 



In conclusion, I wish to express my thanks to Dr. Ezra 

 Brainerd, Dr. Philip Dowell, Mr. W. A. Poyser, and Mr. E. J. 

 Winslow, for the loan of material, 



Columbia University. 



'^ Dry opteris pittsfordensis Slosson, Rhodora 6: 75. l^o\ = Dryopteris margi- 



ame 



nalisy^spinulosa Slosson, nom. nov. 



here for the sake of convenience, as no authority has ever been assigned to the name, 



although Miss Slosson clearly should be considered responsible for it. 



H.^. BOT. GARDEN 



19iO 



