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 grounds. Exceedingly variable in 

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



*1675. A. cannabinum glaberrimum DC. Belle Isle, O. 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. Miller's Dogbane. Detroit, O. A, Farwell. 



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



ASCLEPIADACE^: Lindl. Milkweed Family. 



ASCLEPIAS L. 



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

 W. J. B.; Sturgis; Barren Lake. C. F. Wheeler; Niles. O. J. Stilwell. Rare. 



*16SO. 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 incarnata 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, WinchelPs Cata- 

 logue. 



*1685. A. Syriaca L. Common Milkweed. A. Cornuti 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. Whorled Milkweed. Barrens, S. Mich., Wright Cat.; Mon- 

 roe Co., Grand Rapids, C. F. Wheeler; Washington, Macomb Co., Dr. D. Cooley,, 



ACERATES Ell. 



1689. A. Floridana (Lam.) Hitchc. Florida Milkweed. A. longifolia 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. VINCETOXICUM Walt., in part. 



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

 Escaped from cultivation on College grounds. 



CONVOLVULACE.E 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 Morning glory. Bay City, G. M. Bradford. 

 *1696. C. repens L. Trailing Bindweed. C. sepium repens 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. 



