242 AMERICAN MIDLAND NATURALIST 



Lake Maxinkuckee (H. W. Clarke); No. 804 South Bend, 

 Ind. Found abundantly in all the countries. 



BILDERDYKIA Dumortier. Fl. Belg. Stam. p. 18, (1827). 



Tiniaria Webb, and Moq. ; Webb and Berth. Hist. Nat. 

 Canar. ,3, p. 221, (1836-40). 



Bilderdyckia Convolvulus (Linn.) Dum. 1. c. (1827). 



Polygonum Convolvulus Linn., Sp. PI. p. 364, (1753); Tiniaria 

 Convolmilus Webb, and Moq. 1. c. (1836); Orobanche Ruellii Gesner, 

 Helxine cissampelos Dodonaeus, Centunculus Plinii Anguillara 

 Voluhilis nigra Tabernaemontanus, Gesner, Polygonum hederaceum 

 Columna. 



Lake Maxinkuckee (H. W. Clarke); Pine, Ind. [Lake Co.] 

 (Umbach). Found by me in St. Joseph and Berrien Cos. 



Bilderdykia dumetorum (Linn.), Dum. 1. c. (1829). 



Polygonum dumetorum Linn., Sp. PI. 2nd Ed. p. 522, (1762); 

 Tiniaria dumetorum Opiz, Segnam, p. 98, (1852). 



Nos. 9431, 2520, 1 1354, 1 1444, Notre Dame, Ind. 



Bilderdykia cilinodis (Michx.) Greene, Leaflets., p. 23, (1904). 



Tiniaria cilinodis (Michx) vSmall, Fl. vS. E. U. S. p. 382, (1903). 

 Polygonum cilinode Michx., Fl. Bor. Am. i p. 241, (1803). 



South Haven [Van Buren Co.] (L. H. Bailey). 



TRACAULON Raf., Fl. Tell. 3, p. 13, (1836). 



Echinocaulos (Meisn.) Hassk., Fl. XXV., 2, Beibl. p. 20, (1842). 



Tracaulon sagittatum (Linn.), Small. 1. c. p. 381, (1903). 



Polygonum sagittatum. Linn., Sp. PI. p. 363, (1753) 



Lake Maxinkuckee (H. W. Clarke); Dune Park (A. Chase); 

 Clarke, Ind. (Umbach); Nos. 9384, 2249, 1824, Notre Dame, Ind. 

 745 Sagimay [Laporte Co.]. 



Tracaulon arifolium (Linn.) Raf. 1. c. 



Polygonum, arifolium Linn., Sp. PI. p. 364, (1753). 



Mineral vSprings (Deam) South Haven (Bailey); Nos. 757 

 vSagunay, Ind., 9153 South Bend, Ind. 206, 708 Tamarack, [Laporte 

 Co.]; No. 708 seems to be intermediate between T. arifolium and 

 T. sagittatum 



PSAMMOGONUM Nwd., Am. Mid. Nat. III. p. 171, (1914)., 



Gonopyrum Fisch., and Mey ex C. A. Meg. Mem. Acad. St. 

 Petersb. Scr. VI., VI., p. 144, (1840), not Gonopyros Raf., Med. 

 Fl. I., p. 155, (1828). Polygonella Michx. Fl. Bor. Am. 2, p. 240, 

 (1803), segregate. 



Psamnogonum articulatum (Linn.), Nwd., 1. c. 



