462 PILICES. 



asplenwides Swartz. A. angitstum, Willd. Nephrodium Filixfamina and 

 asplenwides Mich. 



Shady woods. Throughout the U. S. and Can. July. Q.Fern 12 feet 

 or more high, smooth. Stipe tawny. Frond with an outline varying from ob- 

 long to broad-lanceolate, variously divided and subdivided. Sori small, one on 

 each segment of the pinnules, inserted laterally into its minute midrib, oblong 

 and straight, at length by the pushing back of the indusium becoming kidney- 

 shaped and appearing nearly round, but always remaining distinct. 



Female Spleenwort. 



7. ANTIGRAMMA. J. Smith. Antigramma. 



(.From the Greek avri. like, and ypappa, writing ; in allusion to the appearance 

 of the sori.) 



Sori linear, unilateral, mostly approximated in pairs and 

 facing each other, scattered. Indusium linear ; one margin 

 free. 



A. rhizophyUa, J. Smith : frond lanceolate, somewhat crenate, (rarely 

 sinuate,) auriculate-cordate at base; the point very long, attenuate and 

 often rooting. Asplenium rhizophyllum Willd. 



Wet rocks. Can. to Car. ; rather rare. July. 1}.. Fronds several from the 

 same root, 6 or 8 inches long and half an inch to an inch wide at the base, 

 gradually tapering, with a long and linear point which is bent to the ground 

 and often takes root, the base often hastate or conspicuously auricled ; veins 

 forked, reticulated. Sori often approximating in pairs and sometimes confluent. 



Walking Fern. 



. .*- ;!.rj.f ??-<? f***-! 



8. SCOLOPENDRIUM. Smith. Hart's Tongue. 



(Thus named from the resemblance which the lines of fructification bear to 

 the insect called Scolopendra.") 



Sori linear, transverse, on lateral nerves. Indusium double, 

 occupying both sides of the sorus, superficial, opening inwards, 

 as it were, by a longitudinal suture. 



(S 1 . qfficinarum Smith : frond simple, oblong-ligulate, entire, cordate at 

 base. Asplenium, Scoiopendrium Linn. 



Limestone rocks along Chittenango Creek, near the Falls, N.Y. ; abundant 

 Torr. July. 1\. Fern 12 20 inches high, growing in thick tufts. Stipe rathei 

 short, chaffy. Frond 8 15 inches long, 1 2 wide, bright green, pale beneath. 

 Sori linear, "6 9 lines long, oblique to the midrib, confluent in pairs. 



Common Hart's Tongue. 



9. WOODWARDIA. Smith. Woodwardia. 

 (In honor of Thomas J. Woodimrd, an English botanist.) 



Sori oblong or linear, distinct, parallel with the ribs of the 

 frond on either side. Indusium superficial, vaulted, separating 

 towards the rib. 



1. W. angustifolia Smith : sterile frond pinnatifid, with lanceolate slightly 

 serrulate segments ; fertile frond pinnate ; pinnae linear, entire, acute. W, 

 onodeoides Willd. Onoclea nodulosa Mich. 



