6G2 FTLicics. (fkrxs.) 



■<- *- Fronds nnre. or i trier plnnalr : plunoi indeed. 



5. A. montanum, WilUl. Fromh (2' -5' hv^h), orate-lanccolate, pinnate; 

 the ovate piniHV n-l-p<irt,d (or the \\\i\k\- hardy cleft) and cut-toolhxl ; fruit-dots 

 very short, tlie hasal ones sometimes doiihle. — Cliffs in the Alleghanies, Penn- 

 sylvania (Mr. Lid, Prof. Porter), to Virginia and southward. July. — Khaehis 

 green, hroail and flat : stijie hrown at the hasc. 



6. A. Ruta-mur^ria, L. Fnmds (-2' - A' \ow<^) ovate in outline, 2-3-])in- 

 nate bf/oiv, sinijilj pinnate (d'ove ; the few dii:isio7is 7-homliic-wtd^;c-sha/tLd, toothed or 

 ihcised at the apex: veins forking, diverging from the hasc; fruit-dots few, elon- 

 gated, soon confluent, — Limestone cliffs, Vermont to Michigan, Virginia, and 

 southward along the mountains : scarce. July. (Eu.) 



* * Indusiian sli(jhthj curved, stron(jIi/ convex, thickish : fruit-dots vcrij numerous and 



crowded. (Fronds tall, simply pinnate, decaijini) in autumn.) 



7. A. angUStifdlium, Miehx. Fronds (2° -:i°h\Q\\)ihm, si mph/ pinnate; 

 pln/ifn numerous, short-stalked, lincar-hmceolate, acuminate, entire or crenulatc 

 (.•J' -4' long), those (f the fertile frond narrower, ■ fruit-dots linear, 20-40 each side 

 the midvcin. — Rich woods, W. New England to Wisconsin, and southward 

 along the mountains. Sept. 



* * * Lower fruit-dots sint/le, those ton-ards the ends rf jiinme double : indusium 

 straiijlit, slii/htl/j convex, thinniish. (Fronds tall and ample, de.c<iijing in autumn.) 



8. A. thelypteroides, Miehx. Fronds (2° -3° high) pinnate; pinntB 

 deeply pinnatijid, linear-lanceolate (.T-5' long); the lobes oblong, obtuse, mi- 

 nutely toothed, crowded, each bearing 3-G paiis of ohlony fruit-dots. — Rich 

 woods: not rare. July- Sept. 



§2. ATIIYRIUM, Roth. Indusium ch Urate, curved, of en crossing the vein, and 

 attached to both sides of it, thus beeowint/ reniform, or shaped like a horseshoe. 



9. A. Filix-fosmina, Bernh. Fronds (l°-3° high) ovate-oblong or 

 broadly lanceolate, twice pinnate; pinnre lanceolate, numerous ; pinnules con- 

 fluent on the secondary rhachis by a narrow margin, oblong and doubly serrate, 

 or elongated and pinnatcly incised with cut-toothed segments; fruit-dots short, 

 variously curved, at length confluent. (Aspidium Filix-fo-Mnina & A. asplcni- 

 o'ldes, Swaiiz.) — A narrow form is Aspidum angiistum, Willd. — Moist 

 woods: common, and very variable. July. (Eu.) 



9. SCOLOPENDRIUM, Smith. Hart's-Toxgue. (PI. 17.) 



Fruit-dots linear, elongated, almost at right angles to the midrib, contiguous 

 by twos, one on the upper side of one veinlet, and the next on the lower side of 

 the next sujK'rior veinlet, thus appearing to have a double indusium opening 

 along the middle. (The ancient Greek mime, so called because the numerous 

 parallel lines of fruit resemble the feet of the centipede, or Srolopcndra.) 



1. S. vulgare, Smith. Frond oblong-lanceolate from an auricled-heart- 

 shajjcd base, entire or wavy-margiucd (7'- 18' long, l'-2' wide), bright green. 

 (S. oflicinaruin. Swart;, a later 'lanic.) — Shaded ravines and under limestone 

 cliffs, Chittenango Falls, and near Jamesville, &c., Onondaga Co., New York, 

 Pursh, \V. Cooper, Lewis Foote, J. A. Paine: also in Canada West. (For a full 

 account of stations, see Silliman's Journal for May and September, 1866. (Eu.) 



