60a. PHEGOPTERIS. 487 



a. Veins uniting as in Nephrodium. 



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



c. Sori round. § 3. GONIOPTERIS. 



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



b.b. 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. 



Fronds i — 2 X piivMte. 



b. Pinnae cut down %-way or more to the casta into close, regular, en- 

 tire or subenfire secondary segments^ ^^-'' ^VT^e^T ^t^.*-. *5 ''>-^^^ y^' 

 c. Stipes not tuberculate at the base. 



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



e. Texture herbaceous or membranaceous. 



(1) Ph. appendiculata. 

 e.e. Texture coriaceous or chartaceaus. 



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 reduced. 



. fff 

 )tc. Sori ± terminal on the veins^ i pinnae without a gland 



at the base. ' ' (3) Ph. Smithii^ 



3|i:.;|<. Sori nearer the costulae than the edge. Pinnae with 

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



cu;. Stipes tuberculate at the base. (5) Ph. tuberculata. 



b.b. Pinnae cut down nearly or quite to the costa into toothed or lobed se- 

 condary segments. 



§. Stipes naked, stramineous or secondary segments at best toothed. 



(6) Ph. oxyodus. 

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

 lower secondary segments lobed or incised. 



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

 base. (7) Ph. subobscura. 



