Benedict : New hybrids in Dryopteris 47 



what to-day is ordinarily known as Dryopteris Clintoniana^ an 

 inquiry as to the exact identity of the type of this species is much 

 to be desired. 



Dryopteris cristata x Goldiana hyb. nov. 



Fertile fronds tall, up to 120 cm. \ stipe pale, clothed with dark 

 scales; lamina narrowly elliptic-lanceolate, acuminate, up to 73 cm. 

 long, 18 cm. broad, once pinnate ; pinnae lanceolate above, oblong- 

 lanceolate in the median portion, and deltoid-ovate below, long- 

 acute or slightly acuminate, short-stipitate except in the upper part 

 of the frond, nearly pinnate; pinnulae 12-14 pairs on the median 

 pinnae, oblong, acute or acutish, entire or slightly crenate-serru- 

 late, the costal pinnulae constricted on both sides, the remainder 

 merely notched above or wholly adnate : son 6-% on the larger 

 pinnulae, nearer the midvein than the margin ; indusia rather thin, 

 glabrous, the cells about as broad as long and in fairly regular 

 radial rows, the walls rather thin, straight or only slightly sinuate. 



Type in the Underwood Fern Herbarium, New York Botanical 

 Garden, W. A, Poyser^ Swarthmore, Pa., June 20^ 1908. Also 

 jog A and B from the same locality and collector, July 15, 1906. 



The critical characters on which the identification of this fern 

 is based are, on the one hand, the cell-structure of the indusium, 



w 



which shows its relationship to D. Goldiana^ and on the other, 

 its slender outline and broad lower pinnae, which relate it to D. 

 cristata. But it shows its relationship to both parents, and is 

 intermediate between them in its stipe-scales, in the shape of the 

 pinnae, in the shape and number of the pinnulae, and in the num- 

 ber and position of sori on each. The type specimen was origin- 



r 



ally identified by Mr. Poyser as ^^ Dryopteris Clintoniana (Eat.) 

 approaching v, sihatica^' but it differs from this fern in about the 

 same degree that D. cristata differs from D. spinidosa. The 

 sporangia are all abortive. 



Dryopteris Goldiana x spinulosa hyb. nov, 



Nephr odium cristatum Clintoniamim f. silvaticum Poy se r, Fe rn 



Bull. 16: 13. [Mr] 1908. 



Fronds up to no cm. long ; stipes pale yellowish, clothed at 

 the base with dark lanceolate scales ; lamina elliptic or elliptic- 

 lanceolate, 75 cm. long, 27 cm. broad, very nearly twice pinnate ; 

 pinnae mostly obHque to the rachis, varying from oblong-lanceo- 

 late in the upper portion of the frond to elliptic-lanceolate or 



