348 



NATURAL HISTORY BULLETIN. 



Moist, rich woods; common in the central, southern and 

 eastern portions of the state. Our widest-leaved species, the 

 plants often a foot high, with leaves 4-10 lines wide. Though 

 long considered a variety of C. laxi flora Lam., it seems to be 

 worthy of specific rank. The name albursina, given to it by 

 Mr. E. P. Sheldon, is in allusion to White Bear Lake, Minne- 

 sota. 



Clinton county, 1878, Butler; Big Grove twp., Johnson 

 count)-, 1894, Shimek; Kellogg, 1876, Jones ; Ames, Hitch- 

 cock, Peters ; Wild Cat Den, Muscatine county, and Allen's 

 Grove, Scott county, Barnes & Miller; Richland twp., Jasper 

 county, May, 1886, IVbrris; High Bridge, Dallas county, 

 July 6, 1897, Shimek ; Dallas Center, 1897, a leaf specimen 

 only, but probably this, RJiinehart. 



Note. — C. flantaginca Lam. Encyc. in, 392 (1789), has been reported 

 from Iowa, but I have been unable to find any authentic Iowa specimen. 

 It closely resembles C. albursina Sheldon, in general appearance, but 

 flowers before the dark green leaves are produced. It is reported from 

 Wisconsin and Illinois. 



37. C. setifolia (JDezv.) Britton. Illus. Flora, i, 332, fig. 



790 (1896). 



C. eburnea Boott. Hook. Fl. Bor. Am. n, 226 (1840). 

 C. alba var. setifolia Dew. Am. Jour. Sci., II, 316 (1826). 

 Illus. Flora, 1. c; Bailey in Gray's Man., 6th ed., 610; Arthur, Fl. Iowa, 34; 



Hitchcock, PI. Ames, 525; MacMillan, Metas. Minn. Val , 118; Tracy, 



Fl. Mo., 93; Webber, Fl Neb., 98. 



Rare in woods, preferring rather dry, sloping, and well 

 shaded ground; the fruit black and shining when fully ma- 

 tured, and not falling till late in the autumn. 



Clinton county, 1872, Butler ; Estherville, Emmet county, 

 Iowa, 1882, and Armstrong, Aug. 31, 1897, Cratty ; Jackson 

 county, 1894, Shimek; Ames, Bessey, Hitchcock. 



38. C. richardsoni R. Br. Richards, App. (Frank.) Jour- 



nal, 751 (1823). 



Illus. Flora, 1, 332, fig. 792; Gray's Man., 6th ed., 610; Arthur, Cont. Fl. 

 Iowa, iv; MacMillan, Metas. Minn. Val., 117; Tracy, Fl. Mo., 94; Bren- 

 del, Fl.Peoriana, 62; Hale, Add. Fl. Wis., 5; Rydberg, Fl. Bl. Hills, S. 

 D-, 527- 



