30 ASPLENIUM 



EBONY SPLEENWORT: 



Asplenium platyneuron. 

 (A. ebeneum.) 



Fronds upright^ 8 to 20 inches high., growing in 

 little tufts ; fertile fronds much taller than the ster- 

 ile, with more distant pinnae, pinnate; pinnae 

 usually alternate, inclined to be eared on both sides, 

 finely toothed or incised; stipe dark and shining. 



Fruit dots elongated, borne in a double row on 

 the pinnae, nearer the midvein than the margin. 



Found in rocky soil from Maine to Colorado, and 

 southward. 



In the variety serratum the pinnae are more or 

 less deeply toothed. 



NOTES. 



