Lycopomtjm.] LYCOPODIACE^. 525 



secund, though inserted all round the stem, dark green, midrib indistinct. 

 Cones 1-3 in., fusiform, on strict erect leafy branches, the leaves of wbich 

 are erect and not secund ; scales erect, narrow, much longer than the 

 leaves, bases sometimes cordate. — Distrib. Europe, temp, and trop. N. and 

 S. regions. 



** Stem decumbent at the base. Capsules axillary in the upper leaves. 

 5. If. Sela'go, L. ; branches stout uniform in height, leaves subulate- 

 lanceolate quite entire. 



Moors and heatbs, Shetland to Sussex and Cornwall ; ascends to 3,500 ft. in the 

 Highlands ; Ireland; frt. June- Aug. — Stem stout, rigid, shortly creeping at 

 the base ; branches 2-8 in., §-§ in. diam., densely leafy, erect, strict, obtuse. 

 Leaves erect, appressed, incurved, squarrose or spreading, acuminate, pun- 

 gent or not; midrib ; upper capsuliferous sometimes yellower. — Distrib. 

 Temp, and cold N. and S. regions. 





ORDER XCIII.— SELAGINELLA'CEiE. 



Land- or water-plants, stemless, or with branched, slender stems. 

 Leaves small, imbricate all round the stem, or distichous and of 2 forms, 

 long and slender in the stemless species. Capsules of two forms, the 

 larger 2-4-valved, containing macrospores ; the smaller containing micro- 

 spores. — Distrib. All temp, and warm climates ; genera 2 ; species about 

 100. — Affinities. Between Marsilea'cece and Lycopodia'cece. 



In germination, the macrospores of SelagineVla and Isodtes develop a 

 cellular prothall us under the integuments, in the position of three radiating 

 lines ; this is extruded, aud upon its surface are developed many arche- 

 gonia along the above lines, one only of which is fertilized. The micro- 

 spores burst, and emit cells containing each an antherozoid, which, entering 

 the archegonia, fertilize their germ-cell, as in Filices. 



1. SELAGINEL'liA, Beauv. 



Terrestrial plants. Leaves small, uniform and imbricate all round the 

 stem, or of 2 forms, one large and distichous, and the other smaller 

 unilateral on the stem. , Capsules of 2 kinds, in terminal cones : 1, minute, 

 oblong or globose, containing microspores ; 2, larger, 2-4-valved containing 

 1-6 macrospores. — Distrib. Chiefly trop. ; species about 150. — Etym. 

 Diminutive of Sela'go, an old name for Lycopo'dium. 



S. selaginoi'des, Gray; decumbent, leaves lax lanceolate and ovate, 



scales of cone spinulose-ciliate. S. spino'sa, Beauv. 



Bogs and marshes, from Shetland to Lincoln, Derby, Chester, and "Wales ; 

 Ireland ; ascends to 3,300 ft. in the Highlands; frt. July- Aug.— Stems 2-6 

 in., slender, sparingly branched ; branches ascending. Leaves inserted all 

 round, ^-^ in., incurved or squarrose, pale yellow-green, acuminate, midrib 

 obscure. Cones on elongate erect branches, 1-3 in., terete, rather stouter 



