PLANTS OF IOWA 177 



2275. R. nigrobaccus* Bailey. Blackberry. 

 Common in thickets. 



2276. R. procumbens, Muhl. Dewberry. 

 In sandy or rocky soil, not common. 



DRYMOCALLIS, Raf . 



2277. D. arguta, (Pursh.) Eyd. TaU Cinquefoil. 

 On dry prairie and hills, common. 



DASPHORA, Raf. 



2278. D. fruiticosa, (L.) Rydb. Shrubby Cinquefoil. 

 Rare. 



SlBBALDIOPSIS. 



2279. 8. tridentate, (Soland.) Rydb. Three-toothed Cinque- 



foil. 



Very common on the St. Peter sandstone exposures. 

 FRAGARIA, L. 



2280. F. virginiana, Duches. Wild Strawberry. 

 In open places. 



2281. F. virginiana, var. gray ana, (Vilm.) Rydb. Scarlet 



Strawberry. 



Common. This variety is also known under the name 

 of F. illinoensis. 



2282. F. americana, (Port.) Britt. Wood Strawberry. 



2283. F. visca, L. European Wood Strawberry. 

 Escaped from gardens. 



COMARUM, L. 



2284. C. palustra, L. Marsh Cinquefoil. 

 Not common. 



POTENTILLA, L. 



2285. P. monspeliensis, L. Rough Cinquefoil. 

 Rather common, on banks and in thickets. 



2286. P. argentea, L. Silvery Cinquefoil. 

 In dry soil* not common. 



2287. P. pentandra, Engelm. Five Stamened Cinquefoil. 

 Not common. 



2288. P. leucocarpa, Rydb. Diffuse Cinquefoil. 

 Infrequent. 



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