NOTHOCHLJENA ODONTOSORIA. 



91 



If. NIVEA (Snowy). This, as well as the following species, 

 is sometimes included in the genus Cincinalis. It comes from 

 the tropical parts of America. It has thrice-divided fronds, 

 only about 4 inches in length ; they are slightly dusted with 

 white powder above, and densely covered with it on the under 

 side. It is a perfect little gem. 



N. SQUAHATA (Scaly). A Mexican dwarf Fern of great 

 beauty. Fronds pinnate, growing only about 6 inches high; 

 leaflets dark green on the upper side, 

 and white beneath. 



N. TENEEA (Slender). Originally im- 

 ported from Chili. The fronds are some- 

 what triangular in form, thrice-divided, 

 about 6 inches long, supported by 

 slender black stalks. The fronds are 

 dusted with white powder, but not to 

 such an extent as in the last-named 

 species. The only way to increase this 

 and the last-mentioned is by spores ; 

 they germinate quickly and readily. 



JN". TEICHOMANOIDES (Trichomanes- 

 like), Fig. 47. Introduced from Jamaica: 

 known also as Pteris trichomanoides. It 

 is a handsome, slender plant, 1 foot high. 

 Fronds pinnate, pendulous, powdered 

 white beneath, and with brownish hairs ; 

 pinnae bluntly lobed. Spore-masses ter- 

 minal, forming a marginal band. 



The rest of the stove species are N. rufa (rusty) ; -ZV. sinuata 

 (sinuated) ; N. tomentosa (woolly) ; and some others. 



Fig. 47. Nothochlaena 

 trichoir.anoides. (Part 

 of fertile frond natural 

 size.) 



ODONTOSOBIA. 



So called because the divisions of the frond having the sori 

 are tooth-shaped. It includes only two species, which were 



