82 103. SELAGINELLA. A 1 . MONOSTELICAE. 



a. HoinoeOStachyS. 4. Ascendente*. 



1. Intermedial leaves of the stem blunt at the apex. (27) S. Cumingiana. 

 J.4. Intermedial leaves of the stem acute to cuspidate at the apex. 

 2. Sporophylla entire or sparingly denticulate-serrulate. 



A Lateral leaves at least partly, but distinctly, denticulate-serrulate. 



O Spikes rather slender. (28) S. longipes. 



OO Spikes rather stout. (29) S. Quadrasii. 



AA Lateral leaves entire or nearly so. (30) S. integrifolia. 



9.9. Sporophylla more copiously denticulate-serrulate. 



3. Lateral leaves of the main rachis more or less copiously ciliate 

 or ciliolate, at least on 1 side at the base. 

 a. Intermedial leaves of tine, principal rachises cordate or 

 semicordate at the base, the produced auricle distinctly 

 hamato-incurvate. 



X Two incurved auricles, (31) S. banajaoensis. 



XX Only one incurved auricle. 



+ Primary branches simple or pinnate. 



(32) S. infantensis. 

 ++ Primary branches 2 3-pinnate. 



D Lateral leaves of the stipe erect or suberect; 

 spikes 1 Viz mm. diam. 

 O Branchlets 2 4 mm. broad. 



(33) S. Neei. 

 OO Branchlets 4 5 mm. or more broad. 



(34) S. Fenixii. 



DD Lateral leaves of the stipe more or less 

 spreading, or the spikes stouter. 

 V Intermedial leaves entire or at best 

 minutely denticulate. (35) S. Bacanii. 

 VV Intermedial leaves ciliate or ciliolate, at 

 least at the base. 



(f Lateral leaves of the stipe ascending 

 or erect. (36) S. sibuyanensis. 



d"d" Lateral leaves of the stipe spi'eading, 

 or the Imcer more ascending. 



(37) S. Toppingii. 

 Intermedial leaves of the principal rachises whether or 



