728 REPORT OF STATE GEOLOGIST. 



P. arifolium L. Halberd-leaved Tear- Thumb. 



First reported as occurring in the State by Mr. W. S. Blatchley. 

 It grows in moist soils in ravines and along the borders of streams 

 or marshes. Stem habit similar to the preceding, but the plant 

 easily distinguishable because of its halberd-shaped leaves. 



Vigo (Blatchley); Noble (Van Gorder); Clark (Baird and Tay- 

 lor); Putnam (MacDougal); Steuben (Bradner). 



POLYGONELLA Michx. 



articulata (L.) Meisn. Coast Jointweed. 



Along the shores of Lake Michigan as a constituent member of 

 the dune flora. The citation from Clark County by Baird and 

 Tajdor in their catalogue is doubtless an error. 



Flowers July through September. 



Lake (Hill); Porter (Cowles). 



CHENOPODIACE.E. Goosefoot Family. 



CHENOPODIUM L. 



C. album L. Pigweed. Lamb's Quarters. White Goosefoot. 



Abundant in all parts of the State in waste and cultivated 

 grounds. A common and annoying weed in many places. 



Flowering season from June until September. 



Tippecanoe (Cunningham); Daviess (Clements); Jay, Delaware, 

 Eandolph and Wayne (Phinney); Jefferson (J. M. Coulter); Gib- 

 son and Posey (Schneck); Clark (Baird and Taylor); Noble (Van 

 Gorder); Franklin (Meyncke); Putnam (MacDougal); Hamilton 

 and Marion (Wilson); Fayette (Hessler); Vigo (Blatchley); Ham- 

 ilton and Marion (Wilson); Steuben (Bradner). 



C. ALBUM VIRIDE (L.) Moq. 



Occurring in similar localities as the type, from which it is 

 scarcely distinguishable in many instances. Generally confused 

 in local collections with C. album. 



Flowers from June until September. 



Putnam (MacDougal); Fayette (Hessler); Hamilton and Ma- 

 rion (Wilson); Tippecanoe (Coulter); Gibson (Schneck). 



