112 MICHIGAN ACADEMY OF SCIENCE. 



APOCYNUM L. 



*1G73. A. androsaemifolium L. Spreading Dogbane. Borders of woods. Common. 

 Th. 



*1674. A. cannabinum L. Indian Hemp. Low giounds. Exceedingly variable in 

 size, habit, shape of leaves, pubescence. Common. Th. 



*1675. A. cannabinum glaberrimum UC. Belle Isle. 0. A. Farwell. 



1676. A. hypericifolium Ait. Clasping-leaved Dogbane. Washington, Dr. D. Cooley; 

 Flint, Dr. D. Clark: St. Clair Co.. C. K. Dodge. 



1677. A. Milleri Britton. JNliller's Dogbane. Detroit, O. A. Farwell. 



1678. A. pubescens K. Br. ^'elvet Dogbane. Detroit, 0. A. Farwell. 



ASCLEPIADACE^ Liudl. Milkweed Family. 

 ASCLEPIAS L. 



1679. A. amplexicaulis J. E. Smith. A. obtiisifojia Michx. Baldwin. Lake Co., 

 W. J. B.; Sturgis; Barron Lake. C. F. ^Vbeeler; Niies. 0. J. Stihvell. Rare. 



*16S0. A. exaltata (L.) Muhl. Poke Milkweed. A. phytolaccoides Pursh. Moist 

 giounds. Ann Arbor; Ft. Gratiot, Winch. Cat.; Alma; Ionia Co.; Flint; Macomb Co. 

 Infrequent. C. & S. 



*1681. A incarnata L. Swamp Milkweed. Banks of streams. Common. Th. 



1682. A. pulchra Elnh. Hairy ^Milkweed. Hansen's Island. Algonac Co., J. W. 

 Stac^^ 



1683. A. purpurascens L. Purple Milkweed. Woods. Ann Arbor, Winch. Cat.; 

 Ionia Co.; Clinton Co.: Flint; Macomb Co.; Huron Co.; Tuscola Co. S. & S. 



1684. A. quadrifolia .lacq. Four-leaved Milkweed. Ann Arbor, Winchell's Cata- 

 logue. 



*1685. A. Syriaca L. Common Milkweed. A. Conititi Dee. Fields. Common. Th. 

 1686. A. SuUivantii Engelm. Sullivan's Milkweed. Walpole Island, C. K. Dodge; 

 Tuscola Co., C. A. Davis; Esserville, C. F. Wheeler. 



*1687. A. tuberosa L. Butterfly-weed. Pleurisy-root. Sandy soil. Ranges from 

 Canada to Florida and from the Saskatcliewan Valley to Texas. Common. 



1688. A. verticillata L. Whorled Milkweed. Barrens, S. Mich.. Wright Cat.; Mon- 

 roe Co., Grand Rapids, C. F. Wheeler; Washington. ]\lacomb Co., Dr. D. Cooley. 



ACERATES Ell. 



1689. A. Floridana (Lam.) Hitchc. Florida ]\Iilkweed. A. longifoUa Ell. South 

 Haven, L. H. Bailey; Bay Co., G. M. Bradford; Detroit, 0. A. Farwell; Tuscola Co., 



C. A. Davis. 



1690. A. viridiflora (Raf.) Eaton. Green Milkweed. C. & S. Grand Rapids, Geo. 



D. Sones; Ft. Gratiot, Winch. Cat.; S. W.. Wright Cat.; Ann Arbor, C. A. Davis; 

 S. W., H. S. Pepoon; Detroit. O. A. Farwell. Rare. 



CYNANCHUM L. Vi.xcetoxicum Walt., in part. 



*1691. C. nigrum (L.) Pers. Black Swallow-wort. Tinceto.vieuiti nigrum Moench. 

 Escaped from cultivation on College grounds. ^ 



CONVOLVULACEiE Vent. Morning-Glory Family. 

 CONVOLVULUS L. 



1692. C. Americanus (Sims.) Greene. S. W., H. S. Pepoon. 



*1693. C. arvensis L. Bindweed. Alma, Ann Arbor, C. A. Davis; Hubbardston; 

 College grounds, along C. & G. T. R. R. Spreading. 



169.5. C. hederacea Wall. Chinese Morning glory. Bay City. G. M. Bradford. 

 *1696. C. repens L. Trailing Bindweed. C. sepium repeus A. Gray. Frequent. 

 *1697. C. sepium L. Hedge Bindweed. Low grounds. Common. Th. 



1698. C. spithamaeus L. Upright Bindweed. Sandy fields. Local. Th. 



1698a. C. stans Michx. Keweenaw Co., O. A. Farwell. 



