1. CYATHIA. 17 



erecto-patent, forked. Sori in 1 row on each side of the costa, medial; in- 

 dusium campanulate, fragile, breaking down irregularly, persistent. 

 B(yrneo. 



♦ (5) C alternanis, J»r. JBedd., Ilandb. In d. Ferns, SuppL , 2; 

 Alsophila allernans, Hk., Hk. Bk., Syn. Fil., 41 ; Bedd., Ferns Br.L, II, tab] 

 CCXXXVI; Amphicosmia alternans, Moore, Bedd., Handb. Ind. Ferns, 10; Hemi- 

 telia allernans, Hk., Icon. PL, VII, tab. DCXXII; — var. Lobbiana; C.Lobbiana, 

 Hk., Hk. Bk., 1. c, 24. 



Fronds large, sub-2-pinnate. Pinnae short-stalked, remote, 20 — 35 c.M. 

 long, 4-8 c.M. broad, linear-oblong, acuminate, deeply pinnatifid, but pinnate 

 at the base. Segments linear-oblong, acute, subfalcate, spreading, remote 

 or slightly so, ± alternate,' + 1 c.M. broad, the edge entire or serrate, the 

 lowest ones sessile with a broad base. The extremity of the frond suddenly 

 pinnate with oblong, undivided, sessile pinnulae, serrate at the margin. Tex- 

 ture subcoriaceous ; rachis and surfaces naked or the rachis tomentose above; 

 veins approximate, 1 — 2 X forked. Sori 2-seriate on each pinnula or lobe, 

 close, mixed with rather copious, jointed hairs; indusium at length a hemis- 

 pherical cup, completely surrounding the base of the sorus. 



War. liobbiana: Pinnae strongly acuminate nearly to the costa; 

 segments obtuse. Indusium very thin, breaking down irregularly. 



Penang; — var. Lobbiana: Borneo. 



(6) C sarawakensis, HU., Hk. Bk., Syn. Fil., 23; {? G. alter- 

 nans, Pr., C. Chr., Ind. Fil.). 



Fronds large, 2-pinnate. Pinnae distant, stalked, to 30 c.M. long or 

 longer, + 15 c.M. broad, oblong, pinnatifid only at the acuminate apex, pin- 

 nate towards the base. Pinnulae numerous, approximate, horizontal, sessile, 

 10 — 15 m.M. broad, linear, acuminate, crenato-serrate, obliquely cuneate at 

 the base. Texture subcoriaceous; surfaces and rachises naked; veins approxi- 

 mate, 2 — 3-furcate. Sori dorsal, rarely in the axils of the veins ; indusium 

 thin, fragile, breaking down into irregular lobes. 



Borneo. 



* 



(7) C Macgregorii, MueU., Journ. of Bot., XXVIII, 104. 

 Caudex short, under 60 c.M. long. Fronds 3-pinnatifid; rachises more 



or less clothed with an intertangled coat of brown scales. Pinnae ± 10 c.M. 

 long, + 2Vj c.M broad. Pinnulae lanceolate, 4—5 m.M. broad. Segments 



Fu-ICES. ^ 



