540 MINNESOTA BOTANICAL STUDIES. 



Cold wet woods, and wet rocks. Two Harbors, Silver creek, 

 and lake Itasca. June to August. Nos. 446, 532, 916, 1035. 



Alsine crassifolia (Ehrh.) Britt. Mem. Torr. Bot. Club. 

 5:150. 1893-4. 

 Wet places. Pokegama lake, and Itasca county. June, Au- 

 gust. Nos. 202, 748. 



Alsine longifolia (Muhl.) Britt. Mem. Torr. Bot. Club. 

 5:150. 1893-4. 

 In water. Partridge river. July. No. 527. 



Alsine longipes (Goldie) Coville. Contr. Nat. Herb. 4:70. 

 1893. 

 N. P. Junction. June. No. 158. 



Arenaria lateriflora L. Sp. PL 423. 1753. 



Sandy soil. Minneapolis, and Aitkin county. May, August. 

 Nos. 120, 1005. 



Arenaria stricta Michx. PL Bor. Am. 1 : 274. 1803. 

 Sandy knolls. Cannon Falls. July. No. 370. 



NYMPHAEACEAE. 



Brasenia purpurea (Michx.) Casp. Engl. & Prantl. Nat. Pfl. 

 Pam. 3: pt. 2. 6. 1890. 

 Pond. Center City. July. No. 658. 



Nyinphaea advena Soland. Ait. Hort. Kew. 2 : 226. 1789. 



Ponds and shallows. Minnetonka; Vermilion. July. Nos. 

 178, 500, 631, 1187. 



Castalia odorata (Dryand.) Woodv. and Wood, in Rees Cycl. 

 6: no. 1. 1806. 

 Ponds. Minnetonka. June, July. Nos. Ill, 632, 1124. 



RANUNCULACEAE. 



Caltha natans Pall. Reise. Russ. 3:284. 1776. 



Pound floating in ponds, and rooting in mud. It covers an area 

 of two or three acres, in thick masses. Vermilion lake. July. 

 No. 487. 



Caltha palustris L. Sp. PL 558. 1753. 



Wet places. Thompson. Lake Itasca bogs. May, June, 

 July. Nos. 75, 161, 242, 1252. 



Isopyrum hiternatum (Raf.) Torr. & Gray. Fl. N. A. 1 : 660. 

 1840. 



