﻿1. OY.A-THE^^5 Smith. 



Sori globose, dorsal on a vein or veinlet or in the axil of a veinlet ; 

 receptacle elevated, globose or shortly columnar. Indusium inferior, mem- 

 branaceous or somewhat horny, globose, at first quite enclosing the sorus, 

 aftervs^ards evanishing or breaking down and becoming cupshaped, with an 

 entire or more or less irregulai'ly lobed or laciniated margin. 



Caudex arborescent, often beautifully marked with the scars of fallen 

 fronds. Fronds mostly large and divided, rarely simple (not in malayan 

 material) ; veins free, simple or forked. Hk. Bk., Syn. Fil., tab. I, fig. 4. 



Tropical and extra-tropical in the southern hemisphere. 



a. Fronds simply pinnate. (1) C. moluccana. 



tt.a. Fronds -2-pinnatifid to 2-pinnale. 



h. Main rachis densely scaly. (2) C. philippinensis. 



b.b. Main rachis naked or nearly so. 



c. Pinnae pinnatifid throughout. (3) C. aneitensis. 



c.c. Pinnae pinnate, at least at the base. 

 d. Pinnae pinnate near the base. 



e. Pinnae + jS'/^ c.M. broad. Secondary segments + 5 m.M. 



broad. (4) C. duhtensis. 



e.e. Pinnae 3 — 8 c.M. broad.' Segments + ' iO m.M. broad. 



(5) C. alternans. 

 d.d. Pinnae pinnate nearly throughout. (6) C. sarawakensis. 



a.a.a. Fronds 3-pinnati/id to 3-pinnate. 



1. Tertiary segments very small, roundish, not more than ± 2^/^ m.M. 

 long. (7) C. Macgregorii. 



1.1. Tertiary segments oblong to linear, much more than 2^/^ m.M. long. 

 2. Pinnulae pinnatifid, sometimes pinnate at the base. 

 3, Main rachis not prickly, naked. 



1. Tertiary segments entire or slightly crenate. 



*. Veins 7 — 8 on each side of the costulae, deeply forked. 



(8) C. polypoda. 



*.*. Veins + i2 on each side of the costulae, 2 — 3 X 



forked. (9) C. leucotricha. 



