48 Benedict : New hybrids in Dryopteris 



elliptic in the median portion, and to unequally ovate-lanceolate 

 below, acuminate, stipitate nearly to the apex of the frond ; pin- 

 nulae about I2— 16 pairs on the larger pinnae, narrowly oblong 

 or lanceolate, long-acute, up to 4.5 cm. long, and 1.5 cm. broad, 

 varying from constricted on both sides and serrate-lobed on one 

 third to one half of the larger pinnae to wholly adnate and merely 

 serrulate above, the lobes spinulose-serrulate : sori about 8-10 

 pairs, about midway between the midveins and margins ; indusia 

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

 regular radial rows, the walls rather thin, straight or only slightly 

 sinuate. 



A year ago when I first saw a specimen of this fern I was in- 

 clined to identify it as D. Clintoniana x spimilosa, assuming that 

 Mr. Poyser had properly related it to the Clinton fern. After- 

 wards, however, I collected what is certainly D, Clwtoniana x 



sp 



up this identification for M 



plant My first valid clue to its identity came when I took oc- 

 casion to examine the indusia under the microscope and found in 

 them a strong resemblance to the D, Goldiana indusia, and corre- 

 sponding differences from the indusia of the Chnton fern ; even 

 then I did not immediately correctly determine the other parent 

 but, having at that time only a narrow frond of f. sihafica, referred 

 it to D. cristata x Goldiana. Recently, however, Mr. Poyser has 

 loaned me all his material, comprising several fronds, all of which 

 have unmistakable spinulosa characters in the amount of cutting, 

 in the unequally ovate -lanceolate lower pinnae, and in the oblique 

 habit of nearly all the pinnae, and in the position of the sorl. The 

 relationship to Goldie's fern appears in the size and habit of the 

 whole plant, the pinnae widest above the base, as is shown in the 

 original illustration, the numerous pinnulae, together with the 

 shape of the latter and the number of son on each, and particularly 

 in the structure of the indusia. The last-mentioned characters, 

 with the exception of size, also serve to distinguish D. Goldiana x 



H 



Spinulosa from D. Clintoniana. The material was collected rather 

 too early to allow the question of fertility to be certainly ascer- 

 tained, but the Indications are that the sporangia had aborted. 



Dryopteris intermedia x marginalis hyb. nov. 



Rootstock erect or ascending : fronds in a symmetrical crown, 

 spreadhig, the stipes thickly clothed at base with lanceolate 



