ORDER 157.-LYCOPODIACE^E. 



413 



2 I. cchliiospora Dur. Lvs. subulate, 310', red at base, 1530 in number; sporo- 



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



3 I. flaccida Shutt. Lvs. 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, ash-colored ; leaves emersed. Del. R. (Porter), and N. 



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



carps ovate, spotless ; spores minutely tubcrcled. Wicomico R., Md. (Cauby, Porter). 

 81. inelauopoda J. Gay. Leaves very slender, 810', carinate on the back, brown at 



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

 1 I. EiigeJmamii Braun. Leaves 25 100, 1020' long, filiform-linear, weak; sporo- 

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

 ]3. frrariHtt. Leaves about 10, very flaccid, If. N. E. to 111. (J. Wolf). 

 y. raff da. I v*. very numerous, 2f, from a stock 0" 1' 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 antheridia, the 

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

 A. Caroliniaua Willd. Lvs. ovate-oblong, obtuse, fleshy, i", reddish beneath ; eter- 

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



ORDER CLVII. LYCOPODIACE.E. CLUB MOSSES. 



These are interesting evergreen creep- 

 ors 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 crowded into a spike, 2-valved, J*r 

 containing lew rather large spores, or 

 numerous minute ones appearing like 

 powder. 



551, Lycopodium dendroldentn. 552, A single spike, 

 653, A scale with its axillary sporange bursting. 554, 



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 (the branches leafy throughout)., .(b) 



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



b Leaves of the spike bract-like, discolored Nos. 3, 4 



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



c Spikes several (2 6) on each peduncle Nos. 7, 8 



c Spike solitary on each peduncle Nos. 9, 10 



1 lj. Sela0 L. Fir Club Moss. Erect, 2 G', fastigiately branched ; Ivs. covering tho 

 branches, all alike, entire, acute and pungent, awnleas. Tops of high mountains, N. 



