riLiCKS. (ferns.) GGl 



§ 2. LOPtlXSEEIA, Prcsl. Sterile and fertile fronds unlike. : veins of the sterile 

 fronds forming many rows ofwcshes. 

 2. W. angUStifdlia, Smith. Fronds pinnatifid; sterile ones (12'- 18' 

 higli) with hmccohitc sernihitc divisions united Ity a broad wing; fertile fronds 

 taller, with narrowly linear almost disconneetcd divisions, the areolcs and fruit- 

 dots (4"-5"lon^^) in a single row each side of the secondary niidrihs. (W. 

 onocleoules, Wiild. W. arcolhta, Moore.) — Bogs, Massachusetts, near the 

 coast, to Virginia, and southward : rare. Aug., Sept. 



8. ASPLENIUM, L. Spleenwort. (PI. 17.) 



Fruit-dots oblong or linear, oblique, separate; the straight, or rarely ci-.rvcd, 

 indusiuni fixed lengthwise by one edge to the upper (inner) side of the fertile 

 vein: — in some species a part of the fruit-dots are double; the fertile vein 

 bearing two indusia placed back to back. Veins free in all our species. (Xamcd, 

 from a privative and a-rr\j]v, the spleen, for supposed remedial properties.) 



§ 1. ASPLENIUM proper. Indusiuni straight or sliijhtli/ curved, attached to the 



upper side of the vein, rurelij douhle. 



* Indusiuni flat, orflattish, thin. (Fronds evergreen.) 



•f- Fronds pinnutely lohd or parted, or simphj pinnate. 



1. A. pinnatifidum, Nutt. F;o«rfs (3'- C long) lanceolate, p/nna^^r/, or 

 pinnate bilow, tapering above into a slender prolongation, " the apex sometimes root- 

 ing " ; lolies roundish-ovate, obtuse, or the lowest pair long-acuminate ; fruit-dots ii'reg- 

 ular, those next the midrib often double, even the slender prolongation fertile. 

 — Cliffs on the Schuylkill and Wissahickon, near Philadelphia, and southward 

 along the Alleghanies ; also sparingly westward : rare. July. — Resembles the 

 Walking-Leaf (Camptosorus), but the veins are free. Stipes brownish, becoming 

 green higher up, and so passing into the broad pale-gn en midrib. 



2. A. ebenoides, R. R. Scott. Fronds (4' -9' long) broadly lanceolate, 

 pinnatifld, below pinnate, the apex prolonged and slender ; divisions lanceolate from a 

 broad base, the lower ones shorter, often jirolifero.us, as is the apex of the frond ; 

 fruit-dots much as in the last; stipes black and polished, as is the lower part of the 

 midrib, esperiallg beneath. — Limestone cliffs on the Schuylkill, near Philadelphia, 

 Jt. R. Scott, F. Bourguin, Sfc. : very scarce, growing with Camptosorus and As- 

 plenium ebcneum, of which Rev. M. G. Berkeley ( Journ Royal llorticult. Soc. 

 July, 1866) considers it a probable hybrid. 



3. A. Trichomanes, L. Fronds (3' - 8' long) in dense spreading tufts, 

 linear in outline, pinnate ; pinnce numerous, roundish-oblong or oval (3" -4" long), 

 unequal-sided, obliquely wedge-truncate at the base, attached by a narrow point, 

 the midvein forking and evanescent ; the thread-like stipe and rhachis purple- 

 brown and shining. (A. melanocaulon, Willd.) — Shaded cliffs: common. 

 July. (Eu.) A. viride, Iluds., occurs m Canada, perhaps in N. New England. 



4. A. ebcneum, Ait. Fronds upright (8' - 16' high) pinnate, hince-lincar in 

 outline; pinnte (V- 1' long) many, lanceolate, or the lower oblong, slightly scythe- 

 shaped, finely serrate, sessile, the dilated ba.se auricled on the upper or botli sides ; 

 fruit-dots numerous on both sides of the elongated midvein; stipe and rhachi.s 

 blackish-purple and shining. — Rocky, open woods : rather common. 



