86 FLORA OF MICHIGAN. 



*294. P. Virginiaiia, L. Choke-Cherry. Th. 



A shrub or small tree. Very pretty in May by reason of its light green leaves and racemes of white 

 flowers. Common. 



*295. P. serotina, Ehrh. Wild Black Cherry. Th. 



A medium sized timber tree, well known as " Black Cherry." Frequent in C. and S., in places suffi- 

 ciently so for economic use. Rare in N. and U. P. 



1O8. SPIRAEA. L. MEADOW-SWEET. 



*29G. S. salicifolia, L. Common Meadow-Sweet. Th. 



In marshes. Common. 



297. S. tomentosa, L. Hardhack. Steeple-Bush. C. & S. 

 Grand Rapids, G. D. Sones; Ionia Co., and southward. A low shrub with fine rose-colored flowers, 



in dense panicles, and leaves rusty-wooly beneath. Infrequent. 



298. S. lobata, Jacquin. Queen of the Prairie. S. 



"Meadows and prairies, Penn. to Mich.," Gray. Occurs only in the S. W. R. R. track, near Augusta, 

 Prof. Bailey ; Calhoun Co.; University Herb. St. Joseph, V. Willoughby. 



1O9. PHYSOCARPUS, Maxim. NINE-BARK. 

 *299. P. opulifolius, Maxim. Th. 



Along streams. A low shrub with recurved branches, white flowers, clusters of reddish pods, and 

 something the habit of red currant but larger. 



11O. GILLENIA, Moench. INDIAN PHYSIC. 



300. G. trifoliata, Moench. Bowman's Root. 

 WinchellCat. Rare. 



111. RUBUS, Tourn. BRAMBLE. 



301. R. odoratus, L. Purple Flowering-Raspberry. Th. 

 From Ft. Gratiot (Winchell) northward. Not observed in the interior of the C. & S. Common in 



N. and'U. P. 



302. R. Nutkanus, Mogino. Salmon-berry. N. & U. P. 

 Frequent at Petoskey and common farther north. 



*303. R. triflorus, Richard. Dwarf R. Th. 



Frequent. 



*304. R. strigosus, Michx. Wild Red R. Th. 



Variable. Common. 



* 305. R. occidentalis, L. Black R. Thimbleberry. Th. 

 Hybrids between this and the preceding frequently occur. Common. 



*306. R. iieg'lectus, Peck. 

 Hubbardston,. 



* 307. R. villosus, Aiton. Blackberry, Common or High. Th. 



Very common in C., covering thousands of acres of waste pine-land to the exclusion of almost every- 

 thing else. Rare in U. P. 



308. R. Millspaughi, Britton, n. sp. Torrey Bulletin, Dec., 1891, p. 366. 

 Keweenaw Peninsula, L. H. Bailey, in Garden and Forest, 1892, p. 144. 



*309. R. Canadensis, L. Dewberry. Low Blackberry. Th. 



Extensively trailing 12 feet or more deep-rooted, hard to exterminate, and troublesome in sandy 

 fields. Fruit ripe about the middle of July, sweeter than that of R. villosus, Keweenaw Co., F. ; Black 

 Lake, Cheboygan Co., Wheeler. Frequent. 



*310. R. liispidus, L. Running Swamp-B. Th. 



Very abundant through the C. in the pine country, frequently covering the ground. 



112. DALIBARDA, L. 

 311. I>. repeiis, L. 



Ann Arbor, Mary Clark; Macomb Co., Cooley. May occur farther north, and perhaps throughout 

 Lake Huron, Bell, Canadian Catalogue. 



