62 103. SELAGINELLA. 



2.9. Sporophylla heteromorphous, the spikes therefore flattened, 

 broader than thick. A 1 , b. Helerostachys. 



a. Shoots decumbent, at best ascending towards the apex; 

 root-fibres generally extending to the higher nodes. 

 b. Small species; rachises under 6 mm. broad including 

 the lateral leaves; stems at the utmost 1 mm. thick. 



A 1 , b 1 . lnr<>rf'.rffff. 



b.b. No small species ; rachises more than 6 mm. broad 



including the lateral leaves, or the stems at least 1 mm. 



thick. A 1 , b 2 . Bitnlcntae. 



.. Shoots erect, or ascending from a trailing base; root-fibres 

 mostly confined to the lower nodes. 

 f. Small or middle-sized species; stems under 1 mm. thick, 



or the root-fibres confined to the lowest portion. 



A 1 , b 3 . Suberosae. 

 f .f . Large or middle-sized species ; stems more than 1 mm. 



thick, the root-fibres not confined to the lowest portion. 



A 1 , b 4 . Brtchysttchyae. 



1.1. Stems 3 9-stelical. A 2 . PLEIOSTELICAE. 



A 1 . MONOSTELICAE 

 a. HoillOeOStadiyS. 1. nottiltmlet. 



. Leaves proportionally shortly cuspidate. (1) S. convolvens. 



1.1. Leaves proportionally long-cuspidate. (2) S. tamariscina. 



(1) S. COilVolvenS, r. A. r. R., Bull. Btz., 1918, XI, 23; S. 

 involvens, Spring (not Hieron.), Mon., II, 63 ; Bk., Fern AIL, 87 ; (not 

 Lycopodium involvens, Sw.). 



Main stem short or elongate, erect; branches erect, densely tufted, 

 cuneate in outline, 5 15 cm. long, branched down nearly or quite to 

 the base, the branching of all grades between flabellate and 2 3-pinnate. 

 Leaves heteromorphous; of the lower plane crowded, ascending, broadly 



