79 
675. A. obtusifolia, Michx. 
Sandy soil, east; infrequent or scattered. June — July. 
676. A. phytolaecoides, Ph. Poke Milkweed. 
Moist shaded banks, open woods and copses; infrequent or rare. 
June 15th— July. 
Rogers Park. North of Lincoln Park and west to limits. River- 
side. South Chicago. Grand Crossing and south. 
677. A. ovalifolia, Decaisne. 
Near Stony Island; very rare, two specimens were found in 1886. 
Ravenswood. Glencoe. (B.) 
678. A. quadrifolia, L. Four-leaved Milkweed. 
Borders of woods; rare. June. (B.) 
Maywood. East of Woodlawn, 1887. 
679. A. verticillata, L. Whorled Milkweed. 
Dry sandy soil; bluffs and hills of the eastern portions; infrequent, 
more common on sand hills, southeast. 
ACERATES, Ell. Green Milkweed. 
680. A. long-ifolia, Ell. 
South Evanston; infrequent. Riverside and Hyde Park; common, 
Babcock ! Calumet; moist places, C. P. Murry. Clarke, Ind., 
Bastin! 
681. A. viridiflora, Ell. 
Dry grounds throughout the eastern portion of our district; infre- 
quent and scattered. July — August. 
GENTIANACEiE. 
V 
SABBATIA, Adans. 
682. S. ang*ularis, Ph. American Century. 
Rich and dry sandy soil, near the sloughs, southeast; frequent. 
Abundant on shores of sandy sloughs at Miller’s, Ind., Babcock/ 
GENTIANA, Tourn. 
688. G. crinita, Froel. Fringed Gentian. 
. Low grounds ; frequent or common, locally. August — October. 
684. G. serrata, Gunner. Smaller-fringed Gentian. 
G. detonsa , Frees. 
North, it is frequently found with G. crinita in moist places; fre- 
quent south, less frequent elsewhere. August — October. 
