546 MINNESOTA BOTANICAL STUDIES. 



Ribes gracile Michx. Fl. Bor. Am. 1 : 111. 1803. 



Copses. St. Anthony Park; Cannon Falls. May, July. 

 Nos. 32, 365. 



Ribes lacustre (Pers.) Poir. in Lam. Ency. Meth. Suppl. 

 2:856. 1811. 

 Rich woods. Silver creek. August. No. 914. 



Ribes oxyacanthoides L. Sp. PI. 201. 1753. 



Swamps and copses. Minneapolis; Pokegamalake; Thomp- 

 son. May to July. Nos. 115, 197, 433. 



Ribes prostratmn L'Her. Stirp. Nov. 1:3. t. 2. 1784. 



Moist woods. Thompson. May, July (fruit). Nos. 60, 415. 



Ribes rubrum L. Sp. PI. 200. 1753. 



Wooded banks of streams. St. Louis river; lake Itasca. 

 May, June. Nos. 20. 1090. 



ROSACEAE. 



Opulaster opulifolius (L.) Kuntze. Rev. Gen. PL 949. 1891. 

 River banks. Cannon Falls; Thompson. July. Nos. 380. 392. 



Spiraea salicifolia L. Sp. PI. 489. 1753. 



Meadows. Vermilion; Sandy lake; DeSoto. June to Au- 

 gust. Nos. 502, 778, 1106. 



Spiraea tomentosa L. Sp. PI. 489. 1753. 



Moist meadows. Center City; Minneapolis. July, Septem- 

 ber. Nos. 644, 988. 



Sorbus americana Marsh. Arb. Am. 145. 1785. 



Woods. Rare. Lakes Pokegama, Itasca. June. Nos. 199. 

 1046. 



Sorbus sambucifolia (Cham. & Schlt.) Roem. Syn. Mon. 

 3:39. 1847. 

 Rocks. Two Harbors. July. No. 441. 



Amelauchier canadensis (L.) Medic. Gesch. 79. 1793. 



Copses. Two Harbors; Cannon Falls; lake Itasca. May to 

 July. Nos. 112, 360, 1027. 



Crataegus cocciuea L. Sp. PI. 476. 1753. 

 Copses. Sandy lake. August. No. 779. 



Crataegus tomentosa L. Sp. PI. 476. 1753. 

 Copses. Sandy lake. August. No. 789. 



Rubus canadensis L. Sp. PI. 494. 1753. 



Rocky and sandy soil. Thompson; Centerville. July. Nos. 

 400, 697. 



