Class XXIV. Order I. 393 



dots, which become roundish when old. Found among high, 

 shady rocks in Roxbury. Perennial. 



On comparison of the European with the American plant I do 

 not find any specific difference. 



ASPLENIUM EBENEUM. Alt. Ebony Spleenwort. 



Frond pinnate ; divisions lanceolate, somewhat fal- 

 cate, serrate, auricled at base; stem quite smooth. 



Syn. JlsPLENlUM TRICHOMANOIDES. J\Hck. 



Considerably larger than the last. Stipe slender, of a smooth, 

 polished, jet black. Divisions or leafets sessile, oblong, taper- 

 ing to a point, sometimes a little curved, somewhat serrate, fur. 

 nished with an acute lobe on each side at base, which gives 

 them a sort of hastate form. Fructification in short, diverging 

 lines, arranged in a double row on the back of the divisions. 

 Dry woods and hills. Perennial. 



ASPLENIUM THELYPTEHOIPES. Mich. Silvery Spleenwort. 

 Frond pinnate ; divisions pinnatifid ; segments oval, 

 round obtuse, slightly denticulate ; fructification in 

 short, equal, oblique, parallel lines. Mich. abr. 



This most beautiful fern grows to a pretty large size. Stipe 

 smooth, pale. The divisions of the frond are long and pinnati- 

 fid. Segments oblong, close, even, parallel, rounded at the end 

 and nearly entire. Fructification in two rows of short, oblique, 

 close, parallel lines, the opposite pairs forming nearly a right 

 angle. The involucres, when young, have a bright, silvery ap 

 pearance. Found by a brook in Roxbury. Perennial. 



ASPLENIUM RUTA MURARIA. JL. Dwarf Spleenwort. 



Fronds twice pinnate at base, simply pinnate at top; 

 segments rhomboid-wedge shaped, obtusely denticu- 

 late. 



A very small spreading fern found on dry rocks and hills in 

 the western parts of the state. 



ASPLENIUM ANGUSTIFOLIUM. Willd. Swamp Spleenwort. 

 Fronds pinnate, the divisions alternate; upper ones 



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