180 TWELFTH ANNUAL REPORT. 



Li. clavatum, L. Common Club-Moss. 



Common northward, extending thus south at least to Pine county. 



L. coiiiplanatum, L. Club-Moss. Festoon Ground-Pine. 



Common northward ; extending south to Wadena and Pine counties (next in abun~ 

 dance after L. dendroideum, Michx.), Upham. This and the three species next pre- 

 ceding are bounded within nearly the same limits as the pines, spruce and fir. 



Li. coiiiplanatum, L., var. sabinsefoliuiu, Spring. Club-Moss. Ground- 

 Fir. 

 Frequent far northward ; upper Mississippi river, Garrison, 



SELAGINELLEiE. 



SELAGIJfELiLA, Beauv. Dwarf Club-Moss. Selaginella. 



S. selaginoides, Link. Dwarf Club- Moss. 



Isle Royale, Dr. Lyons; north shore of laiie Superior, Macoun; doubtless to be found 

 In northern Minnesota. 



S . rupestris, Spring. Dwarf Club-Moss. 



Throughout the state. Lake of the Woods, Dawson; Morrison, Benton and Stearns- 

 counties, Upham; upper Minnesota river and falls of the St. Croix, Parry; Blue Earth 

 county, Leiberg; Redstone, near New Ulm, Juni; Redwood Falls, Miss Butler; Pipestone 

 quarry, Mrs. Bennett. 



[S. apus, Spring, will probably be found in the south part of the state.] 



[Isoetes lacustris, L., L echinospora, Durieu, var. Braunii, Engelm , L rlparla, En- 

 gelm., and I. melanopoda, J. Gay, should be looked for in this state.] 



MARSILIACE^. 



]M:ARSILIA, Lam. Marsilia. 



M. vestita, Hook. & Grev.* Marsilia. 



"Dry swamps in the prairies near Devil's lake," in northeastern Dakota, Oeyer; 

 "near the Mississippi river," in Iowa, Dr. Cousens; probably also in Minnesota. (See 

 notes on this species in Arthur's Contributions to the Flora of Iowa, No. ,FJ.) 



[Prof. Eaton writes that the Marsilia cited as collected by Geyer Is the original 

 of M. mucronata, Braun ; but it is regarded by Prof. Eaton as a form of M. vestita, as 

 at first determined by I>r. Torrey, differing from the ordinary type in having longer 

 peduncles and less hairy sporocarps. M. uncinata, Braun, is found, according to Prof. 

 Eaton, in Texas, Louisiana and Florida.] 



SALVINIACE^. 



AZOLiLiA, L. Azolla. 



A. Caroliuiaiia, WiUd. Azolla. 



Lapham. [The range of this species is stated by Prof. Eaton in the Botany of 

 California to be from "Oregon to Arizona, eastward to the Atlantic, and southward to 

 Brazil."] 



*Maksilia vestita. Hook. & Grev. Leaflets broadly cuneate, usually hairy, entire, 

 2 to 7 lines long and broad ; petioles 1 to 4 inches long ; peduncles free from the 

 petiole ; sporocarps solitary, short-peduncled, about 2 lines long, very hairy when 

 young ; upper tooth longest, acute, straight or curved ; lower tooth obtuse, the sinus 

 between them rounded. . . . Oregon to Texas. Eator} in Botany of California. 



