136 



GREENHOUSE FEBNS. 



fronds are about 5 or 6 feet long, according to the strength of 

 the plant ; they are thrice-divided. 



C. SMITHII (J. Smith's). This is another New-Zealand 

 tree Fern, many stems of which have been recently imported 

 by our leading nurserymen. It has a stout stem, covered at 

 the tipper part with brown scales. The fronds are twice or 

 even three times divided, of a bright glossy green colour. 



CYKTOMiriM. 



From kyrtos, convex ; the veins being prominent and in 

 that form. There is only one 

 species, and a remarkably hand- 

 some Fern. It is perhaps the finest 

 of all the greenhouse species. 



CYBTOMIUM FALCATUM (Sickle- 

 shaped), Fig. 62. A Fern from 

 Japan. Fronds 2 feet high, 

 spreading, and of a bright shining 

 green, twice-cut ; the pinnae are 

 broadly falcate, very stout, and 

 slightly waved at the edges, veins 

 very conspicuous, convex, with the 

 spore-masses on central veins. In- 

 creased readily by spores only. 

 We have seen them coming up 

 freely under the stages, if the 

 floor becomes mossy or is formed 

 of earth. 



One or two other species have 

 been recently introduced from 

 Japan. One of these is called 

 C. Fortunei, after its discoverer. 

 It has narrower pinnae, and is certainly very distinct. 



Fig. 62. Crytomium falcatum. 

 (Pinna medium size.) 



