APPENDIX. 5. 1 CIBOTIUM. 793 



This species, as construed on page 48, includes several forms; it is not 

 very difficult to recognize the following. 

 a. Fertile pinnulae rather broad, i^j^ — Jg'/a '^■^- broad.. 



Forma typica {C. Raranetz, J. Sm., Christ, I'hiiipp. Journ., 11, 117): 

 Ultimate segments lanceolate-falcate, acute, subentire or crenato-serrate. Ra- 

 chis and costae deciduously floccoso-araneous. Sori 1 — 2 or sometimes 3 or 4 

 on each side of the costulae, occupying the lower part of the segments, the 

 lowest at a very short distance from the costae, subohlique, but subparallel 

 to the edge, small, not prominent beyond the l;eeth, + 1 m.M. broad; valves 

 of the indusium unequal, the outer one semiglobose, the inner narrower, 

 oblong, yellow-brown, not pruinose. — Tro^p. Asia. 



Var. assamicuin {C. Assamicum, Hk., Spec. Fil., I, 83, tab. XXIX, 

 B; Christ, 1. c; C. glaucum J. Sm., Bedd., Ferns Br.I., I, tab. LXXXIil): 

 Ultimate segments lanceolate-oblong, acute, subfalcate, distinctly serrale-den- 

 late. Rachis nearly naked; costae and costulae sparingly, deciduously floccoso- 

 araneous. Sori 5 — 6 on each side in the fully developed fronds, occupying 

 more than the lower half of the segments, prominent beyond the teeth, the 

 lowest remote from the costae, 1 — 1% m.M. broad; valves of the indusium 

 unequal, as in the type, brown, not pruinose. — Assam, Tonkin. 

 a.a. Fertile pinnulae rather narrow, '/,■ — :/'/j cM. broad. 



b. Costae and costulae + naked or bristly. 



W^ar. susnatraiiuni (C. Sumatranum, Christ, 1. c, 118): Ultimate 

 segments ligulate-oblong, bluntish or acute, crenate-denticulate. Rachis, costae 

 and costulae ,liaked or nearly so. Sori 2 or rarely 3 on each side, occupying 

 the lower part of the segments, the lowest remote from the costae, small, 

 '/•i — 1 m.M. broad; valves of the indusium nearly equal, rufo-fulvous, not 

 pruinose. — Sumatra. 



Var. setosum, v. A. v." R., Bull. D.^p. Agr., I. N., i908, XVIII, 3: 

 Like var. sumatranum, but the rachis, costae and costulae densely provided 

 with pale-brown or yellowish bristles spreading in various directions and 

 leaving the rachis subasperous when Ihey fall. Sori 1 or rarely 2 .on each 

 side, occupying the base of the segments, remote from the costae; indusium 

 fulvous, not pruinose. — Malayan? 



b.b. Costae and costulae pubescent or furfuraceous. 



War. Cumiogii (C. Cumingii, Kze, Christ, I.e.): Ultimate segments 

 triangular-ovate, acute, decumbent, minutely subserrulate-crenate. Costae and 

 costulae densely pubescent]. (furfuraceous?), the hairs whilish or rufous. Sori 

 1 on each side, occupying the base of the segments, adpressed to the costae, 



