278 FERNS I BRITISH AND FOEEIGN. 



leaves generally imbricate, distichous, jungermannia-like, of 

 two sizes ; the smaller stipulseform. Sporangia reniform, 

 vertically bivalved, sessile in the axis of the leaves, or on con- 

 tracted] terminal spikes. Spores of two forms : in some, 

 sporangia (AntJieridangia) small and numerous; in others 

 (Oophoridangia), 3-4, large. 



A. Plant leafy on all sides. 



1g S. spinulosa, Spring. Lycopodium selaginoides, Linn.; 

 8cKk. Fil. 1. 165 ; Eng. Sot. 1. 1148. Europe, Britain. 



2. S. uliginosa, Lab. Nov. Holl. 2, p. 104, t. 251, /. 2; Willd* 



Sp. PI. 5, p. 32. Australia and Tasmania. 



S. Leaves distichous. 



1. Plants surculose. 



f Stems decumbent, creeping. 



3. S. Apus, Spring. Monogr. p. 75. S. densa, Hort. Lycopo- 



dium Brasiliense, Radd. Fil. Bras. 82, t. 1. North 

 America and Brazil. 



4. S. Ludoviciana, A. Braun. Revise, No. 5. Louisiana. 



5. S. Helvetica, Link ; Spring. Monogr. 2, p. 83. Lycopodium 



Helveticum, Linn. Europe, Switzerland. 



6. S. denticulata, Link ; Spring. Monogr. 2, p. 82. Lyco- 



podium denticulatum, Linn. Central Europe. 



7. S. delicatissima,^. Braun. Revise, No. 8. S. microphylla, 



Spring. Columbia. 



8. S. serpens, Spring. Monogr. 2, p. 102. Lycopodium 



serpens, Desv. S. mutabalis, Hort. S. variabilis, 

 Sort. S. Jamaicensis, Hort. Jamaica. 



9. S. uncinata, Spring. Monogr. 2, p. 109. S. cassia, Hort. 



China. 



10. S. hortensis, Metten. Fil. Hort. Lips.p. 128. S. denticu- 



lata, Hort. South of Europe. 



11. S. sarmentosa, A. Braun. S. patula, Spring. S. apo- 



thecia, Hort. West Indies. 



12. S. Pceppigiana, Spring. ; Hook. Fil. Exot. t. 56. Tropical 



America. 



