﻿i^. CYCLOPHORUS. § 1. NIPHOBOLtJS. '68§ 



main veins often distinct to the edge, venation not rarely partially irregular. 

 Sori in 4 — 6 close rows between the main veins so as to form 5 — 8 row^s 

 betvsreen the midrib and edge, sunk in the tomentum when young. 

 Java. 



$ 2. NIPHOPSIS. 



a. Sori in i row on each side of the cosla. 



b. Fronds small, the barren ones under 3 c.M. long, under •''/^ c.M. broad. 



(22) C. Lauterbachii. 

 b.b. Fronds larger, the barren ones 3 — 60 c.M. long, '/^ — 5 c.M. broad. 

 c. Rhizome scales ciliate. (25) C. confluens. 



C.C. Rhizome scales entire. 



d. Fronds 4 — 30 c.M. long, 2 — 5 c.M. broad; rhizome scales 



decoloured at the apex; sori slightly immersed in shallow 



pits. (24«) C. angustatus. 



d.d. Fronds 30 — 60 c.M. long, i — 2 c.M. broad; rhizome scales 



pale-brown at the apex; sori superficial. (246) C. samarensis. 



a.a. Sori not in i row on each side of the cosla, often densely crowded. (*) 



1. Barren fronds generally under 20 c.M. long. 



2. Fronds blunt or rounded at the apex. (25) C abbreviatus. 



2.2. Fronds acute to caudate at the apex. 



3. Barren fronds 5 — 8 c.M. long, on stipes i — 4 c.M. long. 



(26) C. Warburgii. 

 3.3. Barren fronds ii—i8 c.M. long, on stipes 7 — 17 c.M. long. 



(27) C. Sarasinorum. 

 ±.±. Fully developed barren fronds more than 20 c.M. long. 



a. Barren fronds rhatted beneath with scattered stellate hairs. 



(28) C. Christii. 

 a.x. Barren fronds clothed beneath with densely crowded or interlaced 

 stellate hairs. 

 ^. Sori large. 



+. Fertile fronds much exceeding the barren ones. 



(29) C. distichocarpus. 

 +.+. Fertile fronds not much exceeding the barren ones. 



(30) C. asterosorus. 



(**) See also C albicans, Pr, 

 FiucES. 44 



