

PILICES 393 



pinnae subsessile ; pinnules short, pinnatifid, the lobes roundish ; 

 son finally crowded, or confluent. 

 CLOTHED CHEILANTHES. 



Fronds 3 to 6 inches long, and about an inch wide, lance-oblong in their out- 

 line; pinnae about half an inch long, ovate-lanceolate, the tower ones distant, 

 pinnate (the upper ones only pinnatifid) ; pinnules oblong, obtuse, crenately pin- 

 natifid; stipe 1 to 3 inches in length. 

 Hob. Rocky banks : frequent. Fr. July, Aug. 



23. ASPLENIEAE : Sori elongated, oblique to the midrib, each covered with a special 

 indusium,free along one side. 



a. Veins reticulated, except next the margin. 



515. CAMPTOSO V RUS, Link. 



[Gr. Kamptos, bent, and Soros, fruit-dot; descriptive of the sori.] 

 Sori linear, irregularly scattered on the reticulated veins of the 

 simple frond, often approximating in pairs by their free margins, 

 or becoming confluent at their ends, and forming crooked lines. 



1. C. rfeizopIiyl'lUS, Link. Fronds auriculate-cordate at base, 

 lanceolate, with a long slender acumination which often takes root 

 at apex. 



Asplenium rhizophyllum. L.<$ Fl. Ceslr. ed. 2. p. 580. 

 ROOTING-LEAVED C.vMPTOSORUS. Walking-Leaf. 



Frond 3 to 9 inches long, and % of an inch to an inch wide, evergreen, some- 

 times bifid, with 2 acuminations ; stipe 1 to 4 inches long, slightly margined 

 above, smooth. Son often % of an inch in length. 

 Hob. Rocky woodlands : frequent. Fr. July. 



Ob*. The rooting apex of the runner-like frond, often gives rise 

 to new fronds, and those again to others. 



b. Veins forked, free, none of them reticulated. 



516. ASPL,E V ]IUM, L. 



[Gr. a, privative, and Spkn, the spleen ; from supposed remedial virtues.] 

 Sori linear-oblong, oblique, never in pairs, all attached lengthwise 

 to the upper side of the simple, forked, or pinnate, free veins; in- 

 dusium opening along the side toward the midrib. 



f Indusium straight, fixed by Hie whole length. 



1* A. Ruta-mttr^riSI,, L. Fronds bipinnate at base, simply 

 pinnate above ; pinnae rhomboid-cuneate, stipitate, small. 

 WALL-RUE ASPLENIUM. 



Fronds 1 to 2 inches long, and 'half an inch to an inch wide, smooth, dingy 

 green; pinnae 2 to 4 lines long, dentate or partially lobed, above the middle; 

 Stipe 1 to 2 inches long, flat, smooth. Sori finally confluent, of a dark ferruginous 

 color. 

 Hub. Limestone rocks, and cliffs; Great Valley: rare. Fr. July. 



a. A. Tricll6manes, L. Fronds spreading, simply pinnate; 

 pinnae subsessile, roundish-obovate, obliquely cuneate at base; 

 stipe dark purple. 



Fronds 2 to 4 inches long, and % to ^ an inch wide, lance-linear in their outline, 

 often procumbent ; pinnae 2 to 3 lines long, crenate at apex, entire at base, and 

 often a little auriculate on the upper edge ; stipe 1 to 2 inches long, semi-terete, 

 ulightly margined, smooth and polished. Sori finally oval. 

 Sab. Shady rocky banks : frequent. Fr. July. 



