274 - FEENS : BRITISH AND FOREIGN. 



potmd, rarely pinnate. Veins forked; venules free. Fertile 

 segments rachiform, compound panicnlate. Sporangia distinct, 

 in two -amlateral rows, opening vertically in two equal valves. 



1. B. simplex, Sitchcoch ,- Eoolc. et Grev. Ic. Fil. t. 82.— 



North America. 



2. B. Lunaria, Sw. ; Schh. Fil. 1. 154 ; Sook. Gen. Fil. t. 47 A ; 



lAndl. and Moore's Brit. Ferns, t. 61 A; Eooh. Brit. 

 Fei-ns, t. 48; Sowerhy's Ferns, t. 45. Osmunda 

 Lunaria, lArm. Eng. Bat. t. 318; — /3 rutaceum. 

 Botrychium mtacenm, 8w.; Schh. Fil. t. 155 B. — 

 Temperate Zone of the Northern Hemisphere. 



3. B. lunarioides, Sw. Botrypus lunarioides, Michx.; — 



ft obUqunm, A. Gray. Botrychium obliqunm, Muhl. 

 B- lunarioides, iScfefc. Fil. t. 157 ; — y dissectnm, 

 A. Gray. Botrychium disseotum, Spr. ; Sclik. Fil. 

 1. 158. — North America, 



4. E. Virginieum, WUld. Osmunda Virginica, Lirm. Botry- 



chium Virginianum, Sw. ; Schk. Fil, t, 166 ; Hook, 

 Gard. Ferns, t. 29. — Temperate Zone of the Northern 

 Hemisphere, Tropical America, East Indies, and 

 Ceylon, 



Obbeb IV.— lycopodiacejs. 



Flowerless moss or fern-like plants, consisting of firm, erect, 

 creeping or pendulous, simple or branched, often flagelliform 

 stems, famished with acerose, rusciform or jungermanaia-like, 

 sessile leaves, which are generally imbricate, and often disti- 

 chous and of two kinds, bearing in their axis, or on contracted 

 terminal spikes, 1-3-celled reniform or globose sessile spore- 

 cases (sporamgia), of one or of two forms ; one called Anfheri- 

 dangia, containing numerous spores j the other Oophoridangia, 

 containing 1-3-8 large spores. 



168. PSILOTTTM, Sw. 



Btems dichotomously forked, compressed or angular, rigid, 

 erect or slender, pendulous ; leaves obsolete or small, bract- , 



