BEAL ON MICHIGAN FLORA. 97 



EMPETRACE^: Dumort. Crowberry Family. 



EMPETRUM L. 



1403. E. nigrum L. Black Crowberrv. Whitney Cat. Pictured Rocks, G. H. Hicks. 

 U. P. 



LIMMANTHACE.E Lindl. False Mermaid Family. 



FLOERKEA Willd. 



*1404. F. proserpinacoides Willd. False Mermaid. Ionia; Hubbardston; Flint; 

 Ann Arbor, C. A. Davis. Not rare but usually overlooked. 



ANACARDIACE.E Lindl. Sumac Family. 



RHUS L. 



1405. R. aromatica Ait. Fragrant Sumach. R. Canadensis Marsh. Less frequent 

 than other members of the genus. Found chiefly on bluffs and sandy hills through 

 the middle counties of the L. P. "N. to the Saskatchawan," Torr. & Gr.; Saginaw 

 Co., Washtenaw Co., C. A. Davis. Th. 



*1406. R. copallina L. Dwarf Sumach. Abundant in the pine country on light 

 soil. C. & S. 



*1407. R. glabra L. Smooth Sumach. Alma, Ann Arbor, C. A. Davis. Very common 

 in C. Th. 



1407a. R. glabra borealis Britton. Keweenaw Co., O. A. Farwell. 



*1408. R. hirta (L.) Sudw. Staghorn Sumach. R. typhina L. Alma, Ann Arbor, 

 C. A. Davis. 



1409. R. pubescens (Mill) O. A. F. Northern Poison Oak. R. Toxicodendron 

 quercifolia Michx. Belle Isle, O. A. Farwell. 



*1410. R. radicans L. Poison, climbing or Three-leaved Ivy. Poison Oak. L. P. 



1411. R. Rydbergii Small. Keweenaw Co., O. A. Farwell. 



*1412. R Toxicodendron L. Tall-climbing, often to tops of forest trees; stems 

 occasionally several inches in diameter. Th. 



*1413. R. Vernix L. Poison Sumach. Poison Elder. R. venenata DC. Common 

 in swamps. Green Lake, G. Traverse Co. and southward. L. P. 



ILICACE.E Lowe. Holly Family. 



ILEX L. 



*1414. I. verticillata (L.) A. Gray. Black Alder. Winterberry. Low grounds. Th. 

 ILICIOIDES Dumont. NEMOPANTHES Raf. 



*1415. I. mucronata (L.) Britton. Mountain Holly. Nemopanthes fascicularis Raf. 

 Borders of swamps. S. Mich., Wright Cat.; Ionia Co.; Alma, Ann Arbor, C. A. Davis; 

 Montcalm Co.; Flint; Macomb Co., and northward. Frequent. Th. 



CELASTRACE^E Lindl. Staff-tree Family. 

 EUONYMUS L. 



*1416. E. atropurpureus Jacq. Wahoo. Burning Bush. Low river banks. Well 

 distributed, but nowhere very common. C. & S. 



*1417. E. obovatus Nutt. Strawberry Bush. E. Americamts obobatus T. & G. Trail- 

 ing. Common. C. & S. 



CELASTRUS L. 



*1418. C. scandens L. Wax-work. Climbing Bittersweet. Frequent. Th. 

 13 



