Lycopodium. LYCOPODIACEiE. 511 



Stem 2-6 feet or more in length, slender, terete, sparingly clothed with subulate rigid 

 leaves : branches 2-3 inches long; the summit divided into numerous spreading flat linear 

 branches. Leaves 1-2 lines long, entire ; the row along each margin broad at the base, 

 acute and a little spreading at the tip, so that they give the branchlets a serrated appearance ; 

 those of the middle row on each side are narrower and closely appressed. Common peduncles 

 2-4 inches long, forked at the summit, and the branches commonly again divided. Spikes 

 an inch or more in length, cylindrical ; the scales broadly ovate, acute, nearly entire. 

 Capsules reniform, sessile. Sporules pale yellow, spherical. 



Dry woods and thickets : frequent. Fl. July. Widely diffused in Europe, Asia, and 

 America. 



2. SELAGINELLA. Spring, in nouv. mem. de Vacad. roy. Brux. 1842. selaginella. 



[The name is a diminutive of Selago.\ 



Fructification of two kinds, viz. antheridia, which are one-celled, opening at the apex ; and 

 oophoridia, which contain 1-4 (rarely 6) globose-angular grains. — Habit various. Spikes 

 quadrangular ; the bracts in 4 rows. 



1. Selaginella rupestris. Spring. Small Rock Clubmoss. 



Cespitose, with ascending stems ; leaves all of one kind, crowded, imbricated, linear- 

 lanceolate, ciliate, bearing a bristle at the tip, the keel sulcate ; spikes sessile, distinct, 

 acutely quadrangular. — Spring, in Mart. <^ Endl. Jl. Bras. fasc. 1. p. 118. Lycopodium 

 rupestre, Linn. sp. 2. p. 1101 ; Michx. Jl. 2. p. 284 ; Pursh, Jl. 2. p. 654 ; Bigel. Jl. Bost. 

 p. 395 ; Torr. compend. p. 389 ; Hook. ^ Grev. I. c. p. 373 ; Beck, bat. p. 461 ; Darlingt. 

 Jl. Cest. p. 589. 



Plant of a grayish green color. Stems 1-3 inches long, branching and somewhat fastigiate. 

 Leaves terminating in a whitish hair ; the under surface marked with a furrow. Spikes 3-6 

 lines long, sessile, terminating the branches. Scales resembling the leaves. Fructification 

 consisting mostly of oophoridia, which are subglobose, of an orange color, and contain from 

 one to four roundish smooth grains. Antheridia intermixed with the oophoridia ; the grains 

 minute, and of a bright reddish color. 



Dry rocky places : not rare. Fr. July - August. This species grows also in South 

 America, Kamschatka, and India. 



2. Selaginella apus, Spring. Moss-Wie Selaginella. 



Cespitose ; stems flaccid, creeping, flat ; leaves in 4 rows, not auricled ; those of the lateral 

 rows roundish ovate, oblique and spreading ; the intermediate ones on the upper side of 

 the branches smaller, appressed ; spikes dense, leafy ; grains of the oophoridia reticulated, 

 scabrous. — Spring, I. c. Lycopodium apodum, Linn. ; Michx. fl. 2. p. 284 ; Pursh, fl. 



