180 TWELFTH ANNUAL REPORT. 



L. clavatum, L. Common Club-Moss. 



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



Ij. coniplanatum, 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 pineSj spruce and fir. 



Ij.coiiiplanatuin^L.,var.sal)ingefolium, Spring. Club-Moss. Ground- 

 Fir. 

 Frequent far northward ; upper Mississippi river, Garrison. 



SELAGINELLEiE. 



SELAGINELLA, Beauv. Dwarf Club-Moss. Selaoinella. 



S. selaginoides, Link. Dwarf Club-Moss. 



Isle Royale, Dr. Lyons; north shore of lake Superior, Maeoun; 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 Eartb 

 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.] 



[Isoeteslacustris, L., L echinospora, Durieu, var. Braunii, Engelm , L rlparia, Ea- 

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



MARSILIACEJE. 



MARSILIA, Lam. Marsilia. 



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



"Dry swamps in the prairies near Devil's lake," in northeastern Dakota, G?ej/er,' 

 "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. VI.) 



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

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

 at first determined by Dr. Torrey, differing from the ordinary type in having longer 

 peduncles and less hairy sporocarps. M. uacinata, Brauu, is found, according to Prof^ 

 Eaton, in Texas, Louisiana and Florida.] 



SALYINIACE^. 



AZOLLA, L. AzoLLA. 



A. Caroliaiaua, Willd. AzoUa. 



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 lo Texas. Eaton in Botany of California. 



