936 REPORT OF STATE GEOLOGIST. 



P. elongata Pursh. Slender Plantain. 



(P. pusilla Nutt.) 

 Reported only from Gibson County by Dr. Schneck as rare in 

 dry, sandy soil. 



Collected in flower in May. 

 Gibson (Schneck). 



RUBIACE^E. Madder Family. 



HOUSTONIA L. 



H. ccerulea. L. Bluets. Innocence. 



Very abundant in the southern part of the State in grassy 

 places and on damp rocks. It extends north in the State as far as 

 Lake County. It is found in great profusion in favorable stations 

 and is one of the prettiest of our spring forms. 



Flowers from early in April until in July. 



Cass (Hessler); Monroe and Putnam (MacDougal); Jefferson 

 (Barnes); Clark (Baird and Taylor); Franklin (Meyncke); Dear- 

 born (Collins); Vigo and Lake (Blatchley). 



H. purpurea L Large Houstonia. 



Abundant in open places, especially sandy soils about lakes 

 and in dry woods and thickets. 



Flowers from April through June. 



Jefferson (Barnes); Tippecanoe (Cunningham); Monroe 

 (Blatchley); Gibson and Posey (Schneck); Putnam (MacDougal); 

 Kosciusko (Coulter); Cass (Hessler); Marion (Wilson). 



H. ciliolata Torr. Fringed Houstonia. 



Confined to rocky hillsides in the southern part of the State 

 and to sandy shores in the northern counties. Not especially 

 abundant. 



Mowers from May through July. 



Jefferson (Barnes); Clark (Baird and Taylor); St. Joseph 

 (Rothert); Vigo (Blatchley); Floyd (Barnes); Tippecanoe. 



H. longifolia Gaertn. Long-leaved Houstonia. 

 (H. purpurea longifolia Gray.) 

 In central and eastern counties rather sparingly, in low 

 grounds, usually in dry, sandy soil. 



Mowers from May through September. 



Monroe (Blatchley); Jay, Delaware, Randolph, and Wayne 

 (Phinney); Fayette (Hessler). 



