GUIDE 



CHRISTMAS FERN 



Aspidium acres tic 'hoides 

 [See No. 17] 



40. SPINULOSE WOOD FERN 



Aspidium spinulosum var. intermedium 



Very common, usually but not always large, fronds oblong- 

 ovate, 2-3 pinnate, lowest pinnae unequally triangular-ovate, lobes 

 of pinnae thorny-toothed. In woods everywhere. P. 166. 



41. BOOTT'S SHIELD FERN 

 Aspidium Boottii 



From one and a half to more than three feet high. Sterile fronds 

 smaller and simpler than the fertile, nearly or quite twice-pinnate, 

 the lowest pinnae triangular-ovate, upper longer and narrower, pin- 

 nules oblong-ovate, sharply thorny-toothed. In moist woods. 

 P. 168. 



42. CRESTED SHIELD FERN 



Aspidium cristatum 



Usually rather large, fronds linear-oblong or lanceolate, once pin- 

 nate with pinnatifid pinnae, linear-oblong, fruit-dots between mid- 

 vein and margin. In swamps. P- T 7o. 



43. CLINTON'S WOOD FERN 



Aspidium cristatum, var. Clintonianum 



In every way larger than preceding species, fronds usually twice- 

 pinnate, pinnae broadest at base, fruit-dots near the midvein. In 

 swampy woods. P. 172. 



44. GOLDIE'S FERN 



Aspidium Goldianum 



Large, fronds broadly ovate or the fertile ovate-oblong, once-pin* 

 nate with pinnatifid pinnae, pinnae broadest in the middle, fruit-dots 

 very near the midvein. In rich woods. P. 175. 



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