138 TWELFTH ANNUAL REPORT. 



T. i>aliisti*e, L. Arrow-grass- 



Throughout the state. Peat-bogs between Kasota and Mankato (plentlfuH, Let- 

 herg; Red liver valley, Scott. 



T. inaritiniuin, L. Arrow-grass. 



Lapham. Stearns county, Campbell. [Sheyenne river and Devil's lake, Dakota, 

 Geyer.] North. 



T. maritimum, L., var. elatiini. Gray. Arrow-grass. 



Duluth (common), and Minneapolis (frequent), Roberts; Chisago county, Upham; 

 upper Minnesota river, Parry; also, peat-bogs between Kasota and Mankato (plentiful), 

 Leiberg; Emmet county. Iowa (rare), Cratty. 



SCHEUCHZERIA,L. Scheuchzeria. 



S. palustris, L. Scheuchzeria. 



St. Croix river. Parry; near Clearwater, Wright county, .Mrs. Terry; MiDneapolis, 



Kassuhe, (lake Calhoun) iWiss Butler; Emmet county, Iowa (rare), Cratty, 



ALISMA, L Water-Plantain. 



A. Plantag-o, L. Water- Plantain. 



Common throughout the state. "Very vai iable as respects foliage, the forms being 

 determined chiefly by the place of growth and not deserving to rank as varieties." Wat- 

 son, Botany of California. 



ECHINODORUS, Richard, Engelmann. Echinodorus. 



E. parvulus, Engrelm. Echinodorus. 



Muddy margins of po^uls, St. Croix, Parry. [North of lake Superior, Agassiz.] 



SAGITTARIA, L. Arrow-head. 



S. variabilis, Engelm. Common Arrow-head. 



Common (especially the var. hastata. Gray) throughout the state ; var. angustifolia, 

 Gray, Minneapolis, iUiSS Butler. "This plant, so variable in foliage, and so abundant 

 in distribution, furnishes an important article of native food in the tubers which beset 

 its fibrous roots. These tubers (from the fact of their affording nourishment to the 

 larger aquatic fowls which congregate in such abundance about the northwestern 

 lakes) are called by the Chippewas, Wab-es-I-pln-ig, or swan potatoes, a name which 

 has been naturally appropriated to several streams of this region, Wabesipinicon ; 

 meaning, the abode of the swan potato. These tubers frequently attain the size of a 

 small hen's-egg, andare then eaten by the Indians, with whom they are a great favorite. 

 In their raw state they contain a bitter, milky juice, but in boiling become sweet and 

 palatable." Parry. 



S. heteropliylla, Pursh. Arrow-head. 



Upper Mississippi river, Houghton; Hennepin county, Roberts, Orisivold; probably 

 extending through the south half of the state. 



S. g'raiiiinea, Michx. Arrow-head. 

 Minneapolis, Kassubc. South. 



S. cristata, Engelm.* Arrow-head. 



Emmet county, Iowa, on the south boundary of Minnesota, Cratty; doubtless also 

 in this state. 



*SAGiTrARiA CRISTATA, Eugclm. Flowers only of the lowest whorl fertile ; fruit- 

 heads much larger than in S. graminea ; achenia broad, with a conspicuous horizontal 



