424 ORDER 159. FILICES. 



26. BLECHNUM, L. Sori continuous on the cross reinulets, close ic 

 iind parallel with the mid-vein. Indusia opening inward. 



B. sorrulstum MX. Fronds pinnate, lanceolate, erect; pinnae eharply serrulate, 

 those of the fertile fronds contracted. Florida. 



27. ONYCHIUM LUCIDUM (or JAPONTCHM). Delicately beautiful, from 

 h Ind.. and of the easiest culture. Fronds 1 2f, alternatclj pinnate 3 or 4 t.'mes, into 

 innumerable linear-acute segments 2 or 3" long. Few of the segments fertile with an 

 oblong bivalved eorus on the mid-vein half its length. 



28. ASPLENIUM, L. SPLEENWORT. Sori linear or oblong, etraighl 

 (curved in No. 9), separate, regularly arranged, oblique to the mid-vein, 

 each arising with its indusium from the forward side of a lateral vein and 

 opening forward. Veins forked or pinnate. 



* Fronds simple and entire, with regular linear fruit-dota No. 1 



* Fronds simply pinnate. a Pinnae roundish, nearly as broad as long Nos. 2, 3 



a Pinnae long, much longer than wide Nos. 4, 5 



* Fronds partly bipinnate, with few divisions. Ferns small, 2 8' high Nos. 6, 7 



* Fronds twice pinnate, with very many divisions. Large native Ferns Nos. 8, 9 



* Fronds twice or thrice pinnate. Exotic Ferns cult, in conservatories. . .Nos. 10 12 



1 A. NIDUS. BircTs-Nest. Fronds thick and rigid, polished green, tongue-shaped, ob- 



tuse, 2 4f, clustered in a circle, forming as it were a nest. Oahu, &c. A noble Fern. 



2 A. FLABELLIFOLIUM. Fronds very delicate, long and narrow (12 16'); rachis pro 



longed some 5' beyond the pn., and rooting at the end ; pn. broad-cuneate, lobed and 

 toothed, remote and alternate on the rachis. Australia. Suitable for baskets. 



3 A. Trlcliomanes L. Dwarf S. Frond 3 6', lance-linear, in tufts; pn. roundish, 



small, subsessile. bearing several sori each ; stipe and rachis polished-black. Rocks. 



4 A. ebeneum Wld. Ebony S. Fronds 8 14', erect, lance-linear; pn. lance-oblong, 



1', some curved, serrate, auriculate on the upper side ; stalk polished-brown. Dry. 



5 A. angustltollani MX. Fronds 2 2|f, in tufts, the inner fertile ; pn. lance-linear. 



alternate, short-stalked, 25'. of a thin texture; stalks green. Woods, E. and S. 



6 A. Ruta-murarla L. Wall-rue. Very small and delicate, 2 3', 2-pinnate at 



base, pinnate above : pn. petiolulate, cuneate. erose-dentate, few, 3 4". Dry rocks. 



I A. ill on tan urn Willd. Glabrous, 2-pinnate ; tufts 4 8'; pn. oblong-ovate, parted 



into a few (5 or ti) 2- or 3-toothed segm. ; rachis green, winged. On cliffs, Penn., & S. 



8 A. tlielypteroides MX. Silvery S. Fronds ample, ovate-acuminate, 1J 3f; stipo 



pale ; pinnae lance-linear, pointed, distinct, subsessile ; segments oblong, obtuse, ser 

 rate, sessile on the winded rachis, with 2 rows of linear distinct sori. Shady banks. 



9 A. Fllix-feemina Bernh. Lady Fern. Fronds ample, 1 2f, lance-oblong; pn. 



lanceolate-acuminate, rachU not winged ; pnl. lance-linear, cut-pinnatifid ; segments 

 minute, eharply 2-toothed ; sori oblong, curved, finally confluent. Moist woods. 



10 A. GOVINGIAXA. Slender and weak (in conservatories), If. lanceolate-acuminate ; pn. 

 lanceolate, long-pointed, stalkc-d ; rach. winged ; seg. acute, sharp-serratj ; sori oblong. 



II A. BELANGKRI. Fronds lance-linear, 1 2fx2 3', pinnate with deeply pinnatifid 

 pinnae, segment? linear, small, and very numerous, each with a sorus. From Java. 

 Stipe stout, green. The upper base (or axillary) segments are 2-parted. 



12 A. BUI.BIFERUM. Frond lanceolate, bip'nnate, 1 3f; pn. lanceolate from a broad 

 base, deeply pinuatiftd ; seg. oblong, cm-lobed and toothed, bearing 16 bold sori, 

 1 to a lobe. Often produces young plants from bulblets on the upper surface. N. Hoi. 



29. CAMPTOSORUS, Link. WALKING FERN. Frond lanceolate, entire, 

 or pinnatifid, with the apex prolonged and inclined to root. Veins more 

 or less netted. Sori oblong, irregularly scattered, with the mdusia lateral 

 on the vetnlets. (Antigramma, C-B.) 



