ORDER 13?. LYCOPODIACE.E. 



2 I. ecliiiiospora Dur. Lvs. subulate, 3 10', red at base, 15 30 in number; sporo- 



carps round-ovate, spotted, larger spores echinate with minute points. N. J., Pa . & N. 



3 I. flacclda Shutt. Lv$. flaccid, 1 2f long, almost filiform, yellowish green ; sporo- 



carps oblong-ovate ; spores not netted, minutely roughened. Ponds and lakes. Fla. 



4 I. riparia Eng. Lvs. 10-30 in number, 4-S', lin. ; sporocarps oblong, spotted ; sporea 



with a band of crested ridges, a?h-colored ; leaves emersed. Del. R. (Porter), and N. 



5 I. saccliarata Eng. Leaves few (715), subulate-filiform, 23', recurved; sporo- 



carps ovate, spotless ; spores minutely tubcrclccl. Wicomico R., Md. (Canby, Porter). 

 B I. inclaiiopodu J. Gay. Leaves very slender, 810', carinateou the brick, brown at 



base ; sporocarps brown ; spores smooth, smaller than in No. 5. 111. (Prof. Porter). 

 1 I. Eiigelmamii Braun. Leaves25 100, 1020' long, filiform-linear, weak; sporo- 

 carps oblong, spotless ; spores honeycombed all over. Shallow waters, E. and \V. 

 ft. g-rdciiiy. Leaves about 10, very flaccid, If. N. E. to 111. (J. Wolf). 

 y. tali dn. I v*. very numerous, 2f, from a stock 6"!' thick. Del. & Pa. (Porter). 



3. AZOLLA, Lam. Small floating plants, with filiform stems and mi- 

 nute imbricated leaves or fronds. Sporocarps of 2 kinds, sessile on the 

 under side of the branches, the smaller sterile, filled with anthcridia, the 

 larger fertile, thin, containing sporangia on stalks, each with several spores. 

 A. Caroliniana Willd. Lvs. ovate-oblong, obtuse, fleshy, J", reddish beneath ; ftep. 

 ile fruits 1 or 2 at the base of the fertile, and many times smaller. Still waters, N. & VV. 



ORDER CLVII. LYCOPODIACE^E. CLUB MOSSES. 



These are interesting evergreen creep- 

 ers or runners, rarely erect, branching, 

 abounding in ducts, with the leaves small, 

 numerous, crowded, entire, lanceolate or 

 subulate, i-nerved. Fruits sessile, ax- 

 illary or crowued into a spike, 2-valvcd, 

 containing lew rather large spores, or 

 numerous minute ones appearing like 

 powder. 



Kl, Lycopodium dendroidcura. 552, A single spike. 

 553, A scale with its axillary sporange bursting. 654, 

 Spines. 



1. LYCOPODIUM, L. CLUB Moss. 



Spore-cases all of one kind, 1-celled, reni- 

 form, opening transversely, 2-valved ; 

 spores numerous, minute, sulphur-yel- 

 low. Leaves in 4, 8, or 16 ranks. 



Fruit in pedunculated spikes (the fertile branches nearly leafless)., .(c) 

 Fruit in sessile spikes ahe branches h-afy throughout)... (b) 



% Fruit scattered, axillary, forming no distinct spike NOB. 1, 2 



b Leaves of U.e spike bract-like, discolored NOP. 3, 4 



b Leaves of the spikes and stems all alike NOB. 5, 6 



C Spikes several (2 0) on each peduncle NOB. 9, 10 



c Spike solitary on each peduncle Nos. 7, 8 



I L. Sclago L. Fir Club MOKX. Erect, >', fastiiriately branched ; Ivs. covering the 

 branches, all alike, entire, acute and pungent, awnle^. Tops of lii^ r h mountains, N. 



551 



