720 EEPOET OF STATE GEOLOGIST. 



ARISTOLOCHIACE^. Birthwort Family. 

 ASARUM L. 

 A. Canadense L. Wild Ginger. Colt's Foot. 



Common throughout the State in shaded, hilly, rich woods, or 

 along protected slopes. Usually in moist soil. An easily recog- 

 nized form because of its handsome, heart-shaped leaves, brown- 

 ish-purple flower, and the ginger flavor of its root. 

 Flowers in April and May. 



Tippecanoe (Cunningham); Daviess (Clements); Jefferson 

 (Barnes); Clark (Baird and Taylor); Jay, Delaware, Randolph, 

 and Wayne (Phinney); Gibson and Posey (Schneck); Noble (Van 

 Gorder); Dearborn (Collins); Franklin (Meyncke); Putnam (Mac- 

 Dougal); Fayette (Hessler); Vigo (Blatchley); Kosciusko (Coul- 

 ter); Hamilton and Marion (Wilson); Steuben (Bradner). 



ARISTOLOCHIA L. 



A. Serpent aria L. Virginia Snake-root. 



Found throughout the State growing in loose, rich soil. 

 Usually common in its stations. 



Flowers in May and June. 



Tippecanoe (Cunningham); Crawford (Barnes); Clark (Baird 

 and Taylor); Noble (Van Gorder); Jay, Delaware, Randolph and 

 Wayne (Phinney); Gibson and Posey (Schneck); Fayette (Hess- 

 ler); Jefferson and Marion; Steuben (Bradner); Monroe 

 (Blatchley). 



A. tomentosa Siins. Pipe Vine. 



A distinctly southern form which has found its way into the 

 flora of our southwestern counties. It is a twining vine, grow- 

 ing on rich river banks in considerable profusion in the regions 

 indicated. 



Flowers, in May and June. 



Gibson and Posey (Schneck); Knox (Wright). 



POLYGONACE.E. Buckwheat Family. 

 RUMEX L. 



R. Acetosella L. Field or Sheep Sorrel. 



Abundant throughout the State in barren or poor soil by road- 

 sides and in old fields. In many parts of the State it has become 

 a troublesome weed, taking complete possession of pasture lands 

 and meadows. Very difficult to eradicate. Foliage very acid. 



Flowers from May through September. 



