103. SELAGINELLA. A". MONOSTELICAE. a». RADICANTES. 67 



9. Intermedial leaves blunt or acute, at best shortly acuminate. 



f Blmit or bluntish. (10) S. Brooksii. 



f f Aaite or shortly acuminate. 



X Lateral leaves remote on tfie main stem. (11) S. remotifolia. 

 XX Late^-al leaves contiguous or subcontiguous on the main 

 stem. (12) S. confertissima. 



*.». Intermedial leaves long-cuMminate to cuspidate. 



a. Lateral leaves to 2 mm. long on the branchlets. 



X Lateral leaves of the main stem cuneate or rounded on 

 the upper side at the base. 



+ Lateral leaves ciliate or ciliolate, at least at the base, 

 (f Intermedial leaves entire, at best denticulate. 



(13) S. rugulosa. 

 cf cf Intermedial leaves ciliate or ciliolate, at least on 

 one side at the base. (14) S. acutangula. 



++ Lateral leaves not ciliate, at best denticulate. 

 9 Intermedial leaves shortly cuspidate. 



(15) S. repens. 

 9 9 Intermedial lea/ves long-cuspidate. 



(16) S. longirostris. 

 XX Lateral leaves of the main stem cordate or truncate on 

 the upper side at tlie base. 



A Intermedial leaves of tJie stem rounded or truncate 

 on the outer side at the base. (17) S. langirensis. 

 A A Intermedial leaves of the stem auriculate-cordate on 

 the outer side at the base. 



D Macrospores 4 in a macrosporangium, icith the 

 apex provided with 3 radiating ribs. 



(18) S. brachyblepharis. 

 DD Macrospores 1 — 2 in a macrosporangium, tlie 

 apex without radiating ribs. 



(62) S. sungemagneana. 

 3,3. Lateral leaves more than 2 mm. long on the branchlets. 

 S. Lateral leaves at best serrulate-ciliokUe. 



A Macrospores 1 — 2 in a macrosporangium, the apex 

 without radiating ribs. 



D Pinnulae simple or forked. (19) S. Springiana. 

 DD Pinnulae 1 — 2-pinnate. (54) S. Grabowskyi. 



