26 



THE BOOK OF CHOICE FERNS. 



The leaflets are cut down to the rachis (stalk) into numerous quadrangular 

 pinnules only about one hne broad, incurved and rolled over the rachis ; 

 sometimes the lower branches are again branched. The sori (spore masses) 

 occupy the whole margin of the segments. — Hooher, Species Filicum, ii., p. 119. 



C. pinnata — pin-na'-ta (pinnate), Kaulfuss. 



A stove species, of medium size, native of South Brazil, with fronds 

 about 6in, each way and borne on stout, erect, pohshed, dark brown stalks 



6in. to 12in. long. These fronds are simply 

 pinnate (only once divided to the midrib), and 

 furnished with narrow-oblong leaflets 2in. to oin. 

 long, fin. broad when flat, or somewhat divided 

 below, of a coriaceous (leathery) texture, and 

 with both surfaces naked. In the mature plant 

 the edges of the segments are usually much 

 incurved, and the sori (spore masses) are disposed 

 in close rows along the margin. — Hooker, Sjjecies 

 Filicum, ii., p. 119. 



C. triphylla — triph-yl'-la (three leaves to a 

 stalk), Kaulfuss. 

 This stove species, native of South Brazil 

 and Monte Video, is totally distinct from the 

 foregoing two species. It is of much dwarfer 

 habit — its fronds, including their blackish, naked, 

 pohshed stalks, of a wiry, slender nature, 

 not exceeding about 4in. in length. The leafly 

 portion, about fin. each way, is digitate (Fig. 6), 

 being formed of from three to five linear -oblong, leathery segments of nearly 

 equal length, with both sm^faces naked and sori (spore masses) disposed - in 

 close rows along the margin. — Hooker, Sjjecies Filicum, ii., p. 118. 



Fig, 6. Casseheera triphylla 



(nat. size). 



CERATODACTYLIS— Cer-at-od-ac'-tyl-is. See Llavea. 



