﻿60a. PHEGOPTERIS. 487 



a.a. Veins uniting as in Nephrodiura. 



b. Sori free, i. e. the contiguous pairs never conHuent. 



c. Sori round. § 3. GONIOPTERIS. 



C.C. Sori oblong or sometimes linear. § 4. STEGNOGRAMMA. 



h.h. At least the lower (sometimes the higher) contiguous pairs of sori 

 confluent and not rarely running along the excurrent veinlets. Sori 

 oblong, rarely round. § 5. MENISCIUM. 



§ 1. EUPHEGOPTERIS. 



CI. Fronds i — 2 X pinnate. 



b. Pinnae cut down ^j^-way or more lo the casta into close, regular, en- 

 tire or subentire secondary segments. 

 c. Stipes not tuberculate at the base. 



d. Lower pinnae hardly, if at all, reduced. 



e. Texture herbaceous. Lower pinnae with a small gland 



at the base. (1) Ph. appendiculata. 



e.e. Texture + coriaceous. Pinnae without a gland at the base. 



X. Lowest pinnae with the lowest segments free, incised, 



produced, stipule-like. (2a) Ph. quadriaurita. 



x.X. Lowest pinnae with the lowest segments otherwise. 



(26) Ph. erubescens. 



d.d. Lower pinnae gradually reduced. 



if.. Sori + terminal on the veins. Pinnae without a gland 

 at the base. (5) Ph. Smithii. 



:(c.>jc. Sori nearer the costulae than the edge. Pinnae with 

 a gland a( the base. (4) Ph. auriculata. 



C.C. Stipes tuberculate at the base. (5) Ph. tuberculata. 



b.b. Pinnae cut down nearly or quite to the casta mta toothed or lobed se- 

 condary segments. 

 §. Stipes naked, stramineous; secondary segments sharply toothed. 



(6) Ph. oxyodus. 

 $.$. Stipes + bristly or scaly, dark-brown or blackish; at least the 

 lower secondary segments lobed or incised. 



^. Fronds narrow, ± 4 c.M. broad. Pinnae pinnate at the 

 base. (7) Ph. subobscura. 



