676 LYCOrODIACEyE. (CLUB-MOSS FAMILY.) 



cics; macrosporcs (0''.32-0".38 Avi(k') covered with short and twisted crested 

 ridges, which often aiiiistoinose ; microspores (()".()! 7 -()". 020 long) smooth. — 

 Mountain hikes, Penn., New Yoik, and .New Knghmd to Lake Superior, and 

 northward often witli No. 3. (lOu.) — The American is distinguished from the 

 European j)Iant hy the hirger macrosporcs, tiicrcforc I. macnjspora, Dtiricu. 



2. I. Tuekerm&,ni, Braun, n. sp. Lcav<;s (10-30, 2' -3' long) very 

 slender, awl-siiapid, olive-green, the outer ones recurved; sporocarps ovoid or 

 circular, the ujjper third covered hy the velum, the free part sometimes hrownish- 

 spotted; macrosporcs (0".22 -0''.28 wide) on the upper segments covered with 

 parallel and anastoniosizing ridges, the lower half reticulated ; niicro>j)ores 

 (0".013-0''.015 long) smooth or very delicately pa[)illose. — Mystic and other 

 ponds near Boston, together with the next, Tucker mini, W. Boott. 



3. I. echinospora, Durieu. Leaves slender, awl-shaped ; sporocarps 

 ovoid or circular; macrosporcs (0".20-0".25 wide) beset all over with small 

 entire and olitusc or slightly forked spimiles. (Eu. ) — In the Euroi)ean form, 

 which has not yet been found in America, the leaves are very slenderly attenu- 

 ated (3' -4' long), the upper margin of tiie s])orocarp only is covered with the 

 narrow velum, the free part is unspotted, and the slightly papillose microspores 

 are larger (0". 015-0". OIG long). The following are the American forms of 

 this species. 



Var. Braunii. Leaves (l.")-30 in number, 3' -6' long) dark and often 

 olive-green, straight or commonly recurved, half or two thirds of the sporocarp 

 covered by the velum, the free part often with light brown spots; macrosporcs 

 as in the species ; microspores smaller (0".013-0".014 long), smooth (L Braunii, 

 Durieu.) — Ponds and lakes. New England to New York, Penn., and north- 

 ward, often with the two preceding. — Often with a few stomata, especially in 

 Niagara specimens. 



Var. rauric^ta. Leaves (1.5-30, G'-lO'lang) straight or flaccid, bright 

 green ; about one half of the almost circular sporocarp covered by the velum, 

 unspotted ; macrosporcs (0".22-0".27 wide) with shorter and blunter spinules ; 

 microspores as in the last variety, or rarely spinulose. (I. muricata, Durieu.) — 

 In some ponds north of Boston, IF. Boott. 



Var. Boottii. Leaves (12-20, 4' -5' high) awl-shaped, stiffly erect, bright 

 green, with stomata; sporocarp as in last; macrosporcs as in the species, but a 

 little smaller and with very slender spinules. (I. Boottii, Braun, in litt.) — Pond 

 in VV'oburn, near Boston, partly out of water, IT. Boott. 



* * (hmnnfj parti ij out of ivater, either hi/ the pond dri/infj up, or hi/ the receding of 

 the ehh tide; leaves with stomata, and in 6 and 7 with Jour or more peri/iherical 

 hast-hnndles. 



4. I. sacchar^ta, Engelm., n. sp. Leaves (10- 1.5, 2'-3' long) slender, 

 olive-green, curved ; sporocarps small, ovoid, only the upjier edge covered by the 

 velum; nearly unspotted; macrosporcs (0".20-0''.22 wide) minutely tubcrcu- 

 late; micros])ores (0".012 long) papillose. — On Wicomico Hiver, eastern shore 

 of Maryland, between high and low tide, W. M. (.'finlii/. 



5. I. ripkria, Engelm. Leaves (15-30, 4' - 8' long) slender, deep green, 

 erect ; sporocarps mostly oblong, upper margin to one third covered by the 



