103. SELAGINELLA. A'. MONOSTELICAE. , a'. CAULESCENTES. 125 



e. Lateral leaves of the branchlets to 2Vj mm. 



long. (82) S. frondosa. 



e.e. Lateral leaves of the branchlets 3 mm. or 



more long. (83) S. latifrons. 



2,9. Intermedial leaves blunt to acuminate, at best shortly cuspidate. 



3. Leaves conspicuously ciliated. (84) S. pungentifolia. 



3.3. Leaves not conspicuously ciliated. 



4L. Stipes terete or nearly so, not grooved. 



S. Pinnulae simple or forked, at best the largest pinnate. 

 O Lateral leaves nearly as broad as long. 



(85) S. polyura. 

 O O Lateral leaves distinctly longer than broad. 

 V Spikes slender, to 1 mm. diam. 



(89) S. caulescens. 

 VV Spikes stouter, more than 1 mm. diam. 



(86) S. caudispica. 

 &.S. Pinnulae, at least the largest, pinnate. 



e. Spikes short, to 5 mm. long. (87) S. Warburgii. 

 e.e. Spikes elongated, 5 mm. or more long. 

 o Lateral leaves without spurious veins. 

 n Lateral leaves to 2 mm. long. 



(88) S. Boschai. 

 DD Lateral leaves at least 2 mm. long. 



(82) S. frondosa. 

 OO Lateral leaves with spurious veins. 

 X Spikes slender, to VU mm. diam. 



(89) S. caulescens. 

 XX Spikes stouter, 2 mm. or more diam. 



(90) S. striolata. 

 s.s. Stipes more or less angular or grooved. 

 &'. Intermedial leaves shortly cuspidate. 



«'. Branchlets to VU mm, broad. (91) S. aenea. 

 «'.«■. Branchlets at least 2 mm. broad. 



T. Intermedial leaves of main rachis with 

 the basal auricle acute or rounded. 



(92) S. albomarginata. 

 7'.7'. Intermedial leaves of main rachis with 

 the basal auricle hamato-incurvate. 



