CRYPTOGAMIA FILICES 581 



inches long, slender, slightly margined above by the decurrent frond, smooth. 

 Son linear and long (often 1 third of an inch in length), more or less oblique, the 

 induaiwn not unfrequently opening on the aide from the midrib. 



Ifub. Rocky woodlands : frequent. Fr. July, 



f -f- Frond pinnate. 



2. A. kbeneum, Jf'illd. Frond pinnate ; pinnse or leaflets sessile, 

 lance-oblong, rather obtuse, subfalcate, serrate, auriculate at base on 

 the upper side ; stipe and rachis smooth, shining, dark purple. Beck, 

 Hot. p. 453. 



A. trichomanoides. JMx. Jim. 2. p. 265. 

 .Iho, A. polypodioides. MuhL Catal. p. 97. 



Ebony Asplenium. 



Fronds 6 to 12 or 14 inches long, and 3 fourths of an inch to an inch and half 

 wide, lanco-linear in their outline, acute or acuminate, pinnate, smooth; leaflet* 

 alternate, sessile, 1 third to 3 fourths of an inch long, and 2 to 3 lines wide, lance- 

 linear, or oblong, mostly obtuse, and slightly falcate, serrate, semi-hastale, or 

 with an auriculate production on the upper side at base,— often wilh a slight pro- 

 rlncUon on the lower side, and a little cordate at the insertion; stipe 1 to 2 or 3 

 inches long, and, with the rachis, very smooth, dark purple, or sometimes nearly 

 black. Sort oblong, rather short, arranged in a double row along the midrib of 

 the leaflets, with the outer end diverging, finally confluent. 



Hub. Rocky woodlands : frequent, Fr. July. 



3. A. Trichomanks, L. Frond pinnate ; pinnae or leaflets eubsessile, 

 small, obliquely oval, or roundish-obovate, crenate, the base cuncate, or 

 cuneately truncate ; stipe and rachis smooth, shining, very dark purple. 

 Beck, Bot. p. 453. 



A. melanocaulon. Mnhl. Catal. p. 97. Puvsh,Jlm. 2. p. 666. JVw//. 

 Gen. 2. p. 251. Bart. Pliil. 2. p. 21 1. Eat. Man. p. 36. Also, Willd. 

 Sp. 6. p. 332. J Audi. Encij. p. 882. 



Fronds 2 to 3 or 4 inches long, and 1 third to half an inch wide, lance-linear in 

 •heir outline, pinnate, smooth, spreading, and often procumbent; leaflets alternate, 

 *ubsc6sile, 2 to 3 lines long, and nearly as wicte as long, obliquely and irregularly 

 oval, ovate, or obovate-oblong, more or less rounded at apex, crenate, the base 

 i mire, and cither cuneately tapering, or abruptly cuneate-truncate, often a little 

 .iiiriculately produced on the upper side; stipe 1 to 2 inches long, slender, and, 

 with the rachis, semi-terete, or plano-convex, the upper flat surface slightly mar- 

 gined, or prominently angled along each edge, smooth and polished, dark purple, 

 or sometimes nearly black. Sort linear-oblong, finally oval or roundish, 2 to 3 or 

 6 (usually 3 or 4) on each leaflet. 



Hub. Shaded rocky banks : frequent. Fr. July. 



f t t Ftmtf bipinnatiful. 



4. A. thelypterojdes, Mx* Frond pinnate ; pinnae or leaflets 

 sessile, oblong-lanceolate, acuminate, deeply pinnatifid ; the segments 

 oblong, obtuse, crenately 6crratc-denticulate. Beck, Bot. p. 453. 



Thelyptebis-like Aspesxiux. 



49* 



