3^2 NATURAL HISTORY BULLETIN. 



Ames, June, 1870, Arthur; Emmet and Kossuth counties, 

 numerous collections, Cratty; Fremont county, 1894, Fhik: 

 Rock Creek tp., Jasper county, April 10 and May 29, 1896, 

 Johnson ; Eldridge, Scott count}', Barnes & Miller. 



2. E. gracile Koch. Cat. 11, 259 (1800). 



B. gracile var. pancinervium Eng., Gray's Man., 2nd ed., 502 (1852). 

 Ill us. Flora, 1.273, n g- ( H 2 '■ Gray's Man., 6th ed., 583; Arthur, Cont. Fl. 

 Iowa, v ; MacMillan, Metas. Minn. Val., 94; Tracy, Fl. Mo., 92; Bren- 

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

 Neb., 184. 



A slender bog species' with spikes one-half the size of those 

 of the preceding species, the bristles shorter. Our plant is 

 what was formerly called the var. faucinervinm Eng. The 

 plant is also common in northern Europe. 



Emmet county, May, 1883, Cratty; Clarion, Wright county. 

 May, 1886, Rev. E. P. Childs. 



HEMICARPHA Nees. & Am. Ed. New. Phil. Jour., 

 xvii, 263 (1834). 



Low, tufted sedges, closely related to Scirfits. About 3 

 species, of which 2 occur in the United States, the other in the 

 tropics. 



1. H. micrantha ( \ r ahl.) Br it ton. Bull. Torr. Club., xv, 

 104 (1888). 



//. subsqiiarrosa Nees., in Mart., 11, pt. i, 61 (1843). 

 Illus. Flora, 1, 275, rig. 646; Gray's Man., 6th ed., 583; Arthur, Cont. Fl. 

 Iowa, 111; Hitchcock, PI. Ames, 524; MacMillan, Metas. Minn. Val., 

 90; Tracy, Fl. Mo., 91; Brendel, Fl. Peoriana, 61 ; Hale, Add. Fl. Wis., 5. 



Wet, sandy soil; known only from the central and eastern 

 portions of the state. A small, inconspicuous plant, easily 

 overlooked by any but a careful observer. Sometimes con- 

 founded with Cyperus injlexus Muhl. 



Iowa City, 1887, Waterloo, 1889, and Story county, Hitch- 

 cock; Scott and Muscatine counties, Barnes & Miller. 



Notes. — 1. Rhynchospora alba (L.) Vahl. and R. capillacea Torr. will prob- 

 ably yet be found in Iowa. The former species is reported from Minne- 

 sota, Illinois, and Kansas; the latter from Minnesota, Illinois, Kansas, and 

 South Dakota. 



