Class XXIV. Order I. 



ASPIDIUM ASPLENIOIDES. Muhl. Dark Shield fern. 



Stipe glabrous ; frond twice pinnate ; segments 

 oblong, cut-toothed ; dots reniform, arranged near 

 the nerve. 



This is a large, smooth, brittle fern. Divisions of the frond 

 pinnate ; the segments oblong, acute, with distinct teeth, separ- 

 ated by deep indentations. The teeth are again denticulate, 

 and the lower ones somewhat obtuse. Fructification with re- 

 niform or lunulate involucres, at first resembling lines, as in 

 Asplenium, afterwards extending over the whole under surface 

 of the frond, giving it a brownish appearance. Moist woods. 



286. DICKSONIA. 



DICKSONIA PILOSIUSCULA. IFilld. Small fruit ed Dlcksonia. 



Frond twice pinnate ; divisions pinnatifid ; seg- 

 ments toothed ; stipe somewhat hairy. 



Sijn. NEPHRODIUM puxcriLOBULUM. Mich. 



A pretty large, thin, and very delicate fern. The common 

 stalk is smooth, with the exception of a few fine, short hairs, 

 which also invest its divisions. The divisions of the frond are 

 pinnate or pinnatifid, the segments decurrent, oval-oblong, 

 deeply cut or pinnatifid, the partial segments again toothed up- 

 on their edge. Dots of fructification minute, near the margin. 

 Road sides and pastures. Perennial. 



287. ASPLENIUM. 



ASPI.EXIUM MELANOCAULON. Muhl. Dwarf Splcenwort. 



Frond pinnate : divisions roundish., crenate., 

 wedge shaped at base. 



Syn. AsPLEyiUM TRICHOMAtfES. Mich. 



An extremely small arid delicate fern. Frond pinnate. 



