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. ISliller's Dogbane. Detroit, O. A. Farwell. 



1678. A. pubescens R. Br. Velvet Dogbane. Detroit, 0. A. Farwell. 



ASCLEPIADACEiE Lindl. Milkweed Family. 

 ASCLEPIAS L. 



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

 W. J. B.; Sturgis: Barron Lake, C. F. Wheeler; Niles. O. J. Stilwell. Rare. 



*1680. A. exaltata (L.) Muhl. Poke Milkweed. A. phytolaccoides Pursh. Moist 

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

 Infrequent. C. & S. 



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



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

 Stacy. 



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 Jacq. Four-leaved Milkweed. Ann Arbor, Winchell's Cata- 

 logue. 



*1685. A. Syriaca L. Common Milkweed. A. Coriuiti Dec. Fields. Common. Th. 

 1686. A. Sullivantii 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 Saskatchewan Valley to Texas. Common. 



1688. A. verticillata L. ^^'horled Milkweed. Barrens, S. Mich., Wright Cat.; Mon- 

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



ACERATES Ell. 



1689. A. Floridana (Lam.) Hitchc. Florida Milkweed. A. lonffifolia Ell. South 

 Haven, L. H. Bailey; Bay Co., G. M. Bradford; Detroit, O. 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. VV., H. S. Pepoon; Detroit, O. A. Farwell. Rare. 



CYNANCHUM L. Vincetoxicum Walt., in part. 



*1691. C. nigrum (L.) Pers. Black Swallow-wort. Vincetoxieum 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. 



1695. C. hederacea Wall. Chinese ilorning glorv. Bav Citv, G. M. Bradford. 

 *1696. C. repens L. Trailing Bindweed. C. wpitini rei>rn.<< 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. 



