278 
FERNS : BRITISH AND FOREIGN. 
leaves generally imbricate, distichous, jungermannia-like, of 
two sizes ; the smaller stipulaeform. Sporangia reniform, 
vertically bivalved, sessile in the axis of the leaves, or on con- 
tracted terminal spikes. Spores of two forms : in some, 
sporangia ( Antheridangia ) small and numerous; in others 
( Oophoridangia ), 3 — 4, large. 
A. Plant leafy on all sides. 
1. S. spinulosa, Spring. Lycopodium selaginoides, Linn.; 
Schk. Fil. 1. 165 ; Eng. Bot. 1. 1148. — Europe, Britain. 
2. S. uliginosa, Lai. Nov. Soil. 2, p. 104, t. 251,/. 2; Willd. 
Sp. PI. 5, p. 32. — Australia and Tasmania. 
B. Leaves distichous. 
§ 1. Plants snrculose. 
f Stems decumbent, creeping. 
3. S. Apus, Spring. Monogr. p. 75. S. densa, Uort. Lycopo- 
dium Brasiliense, Eadd. 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. dentieulata, Link ; Spring. Monogr. 2, p. 82. Lyco- 
podium denticulatum, Linn. — Central Europe. 
7. S. delicatissima, A. Braun. Revise, No. 8. S. microphylla, 
Spring. —Columbia. 
8. S. serpens, Spring. Monogr. 2, p. 102. Lycopodium 
serpens, Besv. S. mutabalis, Hod. S. variabilis, 
Hod. S. Jamaicensis, Hort. — Jamaica. 
9. S. uncinata, Spring. Monogr. 2, p. 109. S. cassia, Hort. — 
China. 
10. S. hortensis, Metten. Fil. Hod. Lips.p. 128. S. denticu- 
lata. Hod. — South of Europe. t 
11. S. sarmentosa, A. Braun. S. patula, Spring. S. apo- 
thecia, Hort. — West Indies. 
12. S. Poeppigiana, Spring. ; Hook. Fil. Exot. t. 56. — Tropical 
America. 
