KiLiCES. 459 ASPiniu?/t. 



alternate segments nearly to the midrib. Stipe naked and smooth. Segments 

 parallel, a little curved, about i inch wide. Fruit in large, golden dots in a 

 tiouble row, at length brownish. July. 



2. P. Phlego'pteris. L. Triangular FoJyvod. P- conneclile. Mx. 

 fVo/^r/ bipinnatifid, slightly pubescent and ciliate, of a triangular outline, 



the 'Z lovver leaflets or pinnte defle.xed ; subdivisions lanceolate, obtuse, the 

 upper ones entire, lower incisely crenate, lowest adnate-decurrent ; son 

 minute, distinct, solitary. A fern in low woodlands, remarkable for the broad 

 triangular outline of its fronds. These are about a foot in hight, and rendered 

 a liltfe hastate by the lower leaflets (which are broadest) being deflexed. 

 Divisions acuminate, connected at base by the lower segments. Stipes 

 smooth. Auo-. 



/3. connecttle{P. connectile. Mx.) ; somewhat rigid ; segments of the lower 

 divisions all subentire ; veins nearly simple. 



y. hcxagonopterum {P. hexagonopterum. Mx.) ; texture more delicate; 

 srgments cf the loioer divisions pinnatifid ; veins much forked. 



3. P. Drvo'pteris. Ternatc Pobjpod. 



Frond ternate, bipinnate ; hravhes of the frond spreading, deflexed, seg- 

 ments obtuse, s'ubcrenate ; siiri mirinnal ; root filiform, creeping. 'J'his 

 beautiful fern grows in shady places aiid mountainous woods. Rare. Root 

 black and very slender. Stipe "slender and delicate, smooth, nearly a foot high, 

 dividing into 3 light green, diuoping, compound leaflets of very delicate 

 texture. July. 



/3. ca/cfcfref.'OT (P. calcareuia. 5'./'-); branchts (f the f rand erzc'. rather rigid. 



2 . A S P 1' D I U M . 



Sori rotindi-sli, or elliptical, scattered ; inciusium orbicular 

 and umbilicate (fastened at the centre and o])eniii,<^ all 

 around), or reniform, fastened on one side and opening ■ (he 

 other. 



* Frond pinnnto. 



1. A. achostichoi'des. 



Leiiflets of the- frond distinct, alternate, subsessile, falcate-lanceolate, anricn- 

 late on the upper side at base, ciliate-serrulate, only the upper ones fertile ; 

 sori at length confluent; s;/y;e chaffy. Common in rocky shades. Frond 

 1.5 — 18 inches high, of a narrow-lanceolate outline. Stipe with looKe, chaffy 

 scales. Leaflets numerous, slightly curving up'vards, 1 — 2 inches in length, 

 the terminal ones wliich alone are fruitful, are contracted in size, the under 

 side becoming overspread with the sori. June. Aug. 



* * Frond pinnate wuh pinnatifid leaflets. 



2. A. Thely'ptera. Willd. A. Noveboracenss. Willd. 

 Leaflets of the frond linear-lanceolate, deeply pinnatifid, distinct, subsessile ; 



seo-ments oblong, obtuse or acute, subentire, ciliate; sori marginal, small, at 

 length confluent ; s</^;fi smooth and naked. Damp woods. Fronds pale green, 

 tliin and delicate, about a loot long and las wide, acuminate at apex. Leaf- 

 lets acuminate, becoming entire above, sometimes crossing (decussating) at 

 base. Rachis pubescent. Stipe slender, channeled on the upper side. Sori 

 in 2 marginal rows on each segment, finally nearly covering their under 

 surface. July. 



yS. Nocehoraeense. (A. Noveboracense. Willd.) ; rather paler and more deli- 

 cate in texture ; Icjleis more narrow and remote. 



