6i 



No multicellular subterranean bulblets. 

 Q Leaflets verticellate (posterior, sometimes 



depauperate). 

 </) Cortex of the sporophydium transparent 



green. 

 ad) Diam. of antheridium, 800-1000. 



1) Stem more or less spiny; bracts 



(median) and bracteoles (lateral) of 

 the sporophydia small, shorter by 

 almost half than the proximate lat- 

 eral leaflets ; bracts shorter than 

 the bracteoles. 49. galioiJes D. C. 



2) Papillae of the stem minute. Posterior 



leaflets much shorter than the an- 

 terior, the lateral a little longer 

 than the sporophydia ; bracteoles 

 shorter by almost half than the 

 sporophydia ; bracts extremely 

 short. Fertile nodes usually two, 

 in the female plant extremely 

 short, longer in the male plant. 

 50. Duritfi A. Br. 



bb] Diam. of antheridium, 480-700 ; stem 

 smooth or the papillae minute ; pos- 

 terior leaflets short or depauperate, 

 the lateral (1-2 on either side) ex- 

 ceeding the antheridium, and also 

 the sporophydium ; the bracts and 

 bracteoles much shorter than the 

 sporophydium. 51. Krausii A. Br. 

 5 1 a. Stem triply corticated, var. genuina. 

 5ib. Stem doubly corticated, var. stachyo- 



morplia A. Br. 



b) Cortex of the sporophydium fragile, hard, 

 dark brown; circle of stipules a swollen 

 ring on which are papules scarcely 

 prominent, irregularly two-ranked. 

 Lateral leaflets as long as or a little 

 longer than the sporophydium. Stem 

 diplosticlie corticated. 52. pliccochiiou 

 A. Br. 

 Posterior leaflets wanting, anterior very 



