VASCULAR PLANTS OF NORTH DAKOTA 161 
TYPHA Theophrastus. Hist. Pl. 4, 11, Dioscorides 3, 123, 
Plinius, Nat. Hist. 16, 36 and 66, also 19, 2. 
22. Typha palustris Ruellius Nat. Stirp. p. 560, (1543). 
Typha latifolia Linn. Sp. Pl. p. 971 (1753). 
Leeds. 
Family 8. SPARGANIACEAE Agardh, Theor. Syst. PI 
13, (1858). 
SPARGANIUM Dioscorides 4, 21. 
23. Sparganium eurycarpum Engelm. in A. Gray, Man. 
2nd. Ed., p. 430, (1836). 
Borders of Lake Ibsen (extinct on account of drought); Leeds 
(a few plants in a roadside ditch). 
Order 7. HELOBIAE. Bartling, Ord. Nat. p. 70, (1830). 
Family 9. POTAMOGETONEAE Dumortier, B. C. Flor. 
Belg. Stam. p. 163, (1827). 
24. Spirillus foliosus (Raf.) Lunell. 
Potamogeton foliosus Raf. Med. Rep. (II.) 5: 354, (1808). 
Jamestown (Bergman). 
25. Spirillus Friesii (Ruprecht) Nwd. Am. Midl. Nat. Vol. 
PTs, “p. 17 (ors). 
Potamogeton Friesii Rupr. Beitr. Pf. Russ. Reichs, 4, ps 
43, (1845). 
In Lake Ibsen (extinct); Jamestown, in James River. 
26. Spirillus heterophyllus (Schreb.) Nwd. Am. Midl. 
Pie tC. ps 17, (1G13)- 
Potamogeton heterophyllus Schreb. Spicil. Fl. Lips. p. 21, (1771). 
Leeds. 
27. Spirillus natans (Linn.)Nwd. Am. Midl. Nat. 1. c..p. 
16,- (1913). 
Potamogeton natans Linn. Pan. Suec. Am. Acad. II. p. 241, 
749), /9p-+ Pl. pi 126, (1753). 
Wahpeton (Bergman). 
28. Spirillus pectiniformis (Linn.) Nwd. Am. Midl. Nat. 
ne. O., 18) (19L3). 
Potamogeton pectiniforme Linn. Am. Acad. II., p. 241, (1749). 
Potamogeton pectinatus Linn. Sp. Pl. p. 127, (1753). 
Leeds, Lake Ibsen, Devils Lake.—Kulm (Brenckle). 
29. Spirillus perfoliatus (Linn.) Nwd. Am. Midl. Nat. 
Pee. P.)'17; (TOFS). 
