ORDEK 157. L V COrO DIACE^E. 



2 I. ecliiiioftpora. Dur. Lvs. subulate, 3 10', red at base, 15 30 iu number; sporo 



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



3 I. flurcida Shutt. Lvs. flaccid. \ 2f long, almost filiform, yellowish green; sporo- 



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

 1 I.ri|>aria 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 X 

 f I. sacrliaratu Eng. Leaves few (7 15), subulate-filiform, 2 3', recurved : sporo- 



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

 B I. inelaiiopodu <T. Gay. Leaves very slender. 8 10'. carinateon the btick, brown at 



base : sporocarps brown ; t-pore? smooth, smaller than in No. 5. El. (Prof. Porter). 

 1 I. Eiigelmaiiiii Braun. Leaves 25 100, 10 -20' long, filiform-linear, weak; sporo 



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

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

 y. i alhlti. 1 vij. very numerous, 2f, from a stock 0" 1' thick. Del. & Pa. (Porter). 



3. AZOLLA, Lain. Small floating plants, with filiform stums and mi- 

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

 under side of the branches, the smaller sterile, tilled with antheridui, the 

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

 A. C'a rolinla.ua \Villd. Lvs. ovate-oblong, obtuse, lleshy, J", reddish benoith; eter 

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



ORDER CLV11. LYCOPODIACE^E. CLUB MOSSES. 



These are interesting evergreen creep- 

 jrs or runners, rarely erect, branching, 

 abounding in ducts, with the leave* small, 

 nwnerous, crowded, entire, lanceolate or . /' 

 subulate, i-nerved. Fruits sessile, ax- 

 illary or crowued into a spike, 2-valved, 

 containing lew rather large spores, or 

 numerous minute ones appearing like 

 powder. 



Nil, Iycopodiiim df.ndroidjiiu). 552, A single spikr. 

 553, A scale with its axillary npnrariKe bursting. 554, 

 Spwes. 



1. L^COPODIUM, L. CLUBMosa 

 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 leafleee).. .(e) 

 Fruit in sessile spikes (the branches leafy throughout) ... (ft) 



$ Fruit scattered, axillary, forming no distinct spike Noe. 1 < 



b Leaves of the spike bract-like, discolored Nos. 8, 4 



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



c Spikes several (2 (i) on each peduncle JJos. 9, 1C 



c Spike solitary on each peduncle Nos. 7, 8 



I L. Selago L. Fir Club Moss. Erect, 26', fastigiately branched ; Ivs. covering the 

 branches, all alike, entire, acute and pungent, awnless. TODP of hisrh mountains. N. 



