132 METASPERMAE OF THE MINNESOTA VALLEY 



Calla palustris Linn. Spec. ed. 2, 1373 (1762). 

 C. aetniopica Gaertn Fruct. 11,20(1791). 

 Wats, and Coult., Gray's Man. 6 ed. 550; Britt., FI. N. J. 253; Mac, Fl. 

 Can. II. 73: Upham, Fl. Minn. 134; Nym., Fl. Eur.; Led., Fl. Ross. IV, 11; 

 Richt., PI. Eur. 171; Herd., Fl. Eur. Russ. 122; Engl., Nat. Pflanz. II, .3, 

 123: Hart., Fl Scand. I, 428. 



Europe, N. of Alps and Carpathians; Siberia. 

 North America: N. S., N. Br., Q , Ont., Man. to Sas- 

 liatchewan and Hudson Bay, N. W. T. ; S. to N. Eng., N. J., 

 Mich, and Minn. 



Minn, valley; N. E. district only; cold marshes and 

 bogs; perhaps N. W. 



Herb. : Bailey 9S, Vermilion lake; Eoherts 123, Duluth; 

 Sheldon 2000a, Keegan's lake; MacM. 107a, Taylor's Falls. 



ARISAEMA Mart. Flora, 11, 459 (1831). 

 Benth. and Hook., Gen. PI. Ill, 965; Durand, Ind. Gen. Phan. 430; 

 Engler and Prantl, Wat. Pflanz. 2, III, 150 (Engler). 



Living species: 50 ± ; mostly temperate and subtropi- 

 cal Asia; 1-2, Abyssinia; N. America, 3-4; Canada, 2; E. sts., 

 2; S. sts., 3; only in Atl. Region 



Fossil species: Araceae (see Schenck, Palaeophyt, ^11). 



Arisaema tripliylliini (Linn.) Torr. Fl. N. Y. H (1843). 



Arum triphyllmn Linn. Spec. 1365(1758) pro parte. 

 Arisaema atrorubens Blume, Rumphia I, 97 (1835). 

 Wats, and Coult., Gray's Man. 6 ed. 549; Britt., Fl. N. J. 252: Chap., 

 ¥1. S. St. 440; Upham, Fl. Minn. 134; Mac, Fl. Can. II, 72; Webb., Fl. 

 l^eb. 97; Gov., Fl. Ark. 227. 



North America: N. S., N. Br., Q., Ont., N. Superior 

 region to Man.; S. to N. Eng., N. J., Fla. ; W. to Minn., Neb., 

 E. Kansas and Ark. 



Minn, valley: Throughout; abundant; rich woodland 

 and shaded river-banks. 



Herb. : T<ujlor 432a, Janes ville; Ballard 58, Chaska; 

 Arthur 156, Vermilion lake; Herrick 278, Minneapolis; Kas- 

 suhe 221, Minneapolis; Sandberg 528, Vasa; Herb Wickersheim 

 116, Lake Benton; Herb. Moyer 227, 228, Montevideo. 



XL LEMNACEAE. Duck-Weed Family. 



Pistiaceae Linul. Veg. Kingd. (1840) In part. 



Endlichtr, Gen PI. 232 (1840); Benth. and Hook., Gen. PI. Ill, 1000 

 ((1883); Engler in Engler and Prantl, Nat. Pflanz. 2, III, 154 (1887). 



Genera: 2; temperate and tropical regions. 

 Species: 24 ± ; over one-half in tropics. 



