124 103. SELAGINELLA. AI. MONOSTELICAE. Si*. ASCENDENTES. 



finely and irregularly rugulose; microspores reddish-yellow, sparingly 

 capitate-verruculose on the basal half. 

 Neic Guinea, 



a. HomoeOStachyS. 5. Caulescentes. 



1. Lateral leaves of principal rachises provided with a minute spur-shaped 

 auricle on the upper side at the base. (74) S. Presliana. 



J.f. Lateral leaves without a spur-shaped auricle at the base. 



2. Intermedial leaves distinctly cuspidate, the cusp often very long. 

 a. Intermedial leaves hardly oblique, not much produced on the 

 outer side, at the base. 

 A Lateral leaves ciliate or ciliolate, at least at the base. 



(75) S. argentea. 

 A A Lateral leaves entire, at best minutely denticulate. 



(76) S. Griffithii. 



Intermedial leaves distinctly oblique, produced on the outer side, 

 at the base. 



b. Lateral leaves of principal rachises cordate or semicordate 

 at the base, at least one of the basal auricles hamate- 

 incurvate. (77) S. nutans. 



b.b. Lateral leaves not cordate or semicordate at the base, and 

 if so, then the basal auricles not hamate. 

 c. Ultimate branchlets to 2 mm. broad. 

 O Spikes slender, to I*/* mm. diam. 



(78) S. pteriphyllos. 

 O O Spikes stouter, 2 mm. or more diam. 



V Lateral leaves of principal rachises produced 

 at least on otie side at the base. 



(79) S. Jagori. 

 VV Lateral leaves not produced at the base. 



(80) S. luzonensis. 

 c.c. Ultimate branchlets 2 mm. or more broad. 



d. Shoots rather small, 15 30 cm. long. 



(81) S. parvifrons. 

 Shoots larger, 85 75 cm. or more long. 



