424 OUDKU 159. FILICES. 



26. BLECHNUM, L. Sori continuous on the cross veinulets, close to 

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



It. serr ii lat uiu MX. Fronds pinnate, lanceolate, erect ; pinnse eharply serrulate, 

 those of the fertile fronds contracted. Florida. 



27. ONYCHIUM LUCIDUM (or JAP6NICCTM). Delicately beautiful, from 

 E. Ind., and of the easiest culture. Fronds 1 2f, alternately pinnate 3 or 4 t?mes into 

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

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



28. ASPIiENIUM, L. SPLEENWORT. Sori linear or oblong, straight 

 (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-dots 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 bipiunate, with few divisions. Ferns small, 28' 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. 1012 



1 A. NIDUS. Bird's-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. Tricliomanes L. Dwarf 8. Frond 36', lance-linear, in tufts ; pn. roundish, 



f?mall. subsessile, bearing several sori each ; stipe and rachis polished-black. Rocks. 



4 A. ebeneum WId. Ebony 8. Fronds 814', erect, lance-linear; pn. lance-oblong, 



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



5 A. aiig iistii'olium MX. Fronds 2 2jf, in tufts, the inner fertile; pn. lance-linear, 



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



6 A. Itma-mu riirla L. Wall-rue. Very small and delicate, 2 3', 2-pinnate at 



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



7 A. m o ii tu. iiu m Wllld. Glabrous, 2-pinnate ; tufts 4 8'; pn. oblong-ovate, parted 



into a few (5 or 6) 2- or 3-toothed segm. ; rachis green, winged. On cliffs, Penn., & S. 



8 A. tlielypteroides MX. Silvery S. Fronds ample, ovate-acuminate, 14 3f; stipe 



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

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



9 A. Filix-fcemiiia Bernh. Lavty Fern. Fronds amplo, 1 2f, lance-oblong; pn. 



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

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



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

 lanceolate, long-pointed, stalked ; rach. winged ; seg. acute, sharp-serrate ; sori oblong. 



11 A, BELANGEJU. Fronds lance-linear, 1 2fx2 3', pinnate with deeply pimmtind 

 piniue, segments 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.BIFEKUM. Frond lanceolate, bipinuate, 1 3f; pn. lanceolate from a broad 

 base, deeply pinnatifid ; seg. oblong, ctu-lobed and toothed, bearing 1 <J bold soii, 

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



29. CAMPTO SORUS, Link. WALKING FERN. Frond lanceolate, entire, 

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

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

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



