224 AMERICAN MIDLAND NATURALIST 
J. M. Mill’s No. 529, Mt. Pleasant, Iowa, VIII. 1887; 353194, 
J.B: Norton’sNo:.. 458, Riley Co,, Kani; Vil-t22> 2325327-ane 
Rose and Geo. Clinton, VIII. 28, 1895. ‘The last is labelled, “A 
bad weed in IIlinois.’” The spikes are 10 em. long. Though Dr. 
Greene in publishing this species gave no reference to a special 
plant designated as type, we might suspect that he had this spec- 
imen in mind when commenting on it as a rank weedy species 
of low praries in Indiana, Illinois, Iowa, and Missouri.” 
324365, E. Johnson’s No. 622, Ames, Iowa, IX. 14, 1897; 
281163, B. F. Bush’s No. 397, Courtnay, Jackson Co., No. VII. 15, 
1896; 318289, K. Mackenzie’s 313, Sheffled, Mo., VIII. 1, 1897; 
308100, Glatfelter, Creve Coeuer and St. Louis, VIII. 31, 1895. 
216246, W. C. Stephens. Lawrence Kansas. Aug. (Labelled 
as ““P. amphibium.’ 430106, W. F. Wight’s no. 49 Hutchins 
Lake Ganges Tp. Mich. Labelled “P. pennsylvanicum \.”” A very 
narrow leaved specimen that may be distinct. 490346, A. J. 
Peters. Put-in-Bay, O. VIII, 1898.* Sterile. 444735, L. Mosely, 
Oxford; Hrie*Co., Co. EX. ‘2, 1895; 444733 S. H.and D.-RsCampe 
Jackson Co., Mich, IX, 31, 1893. 444736 L. Mosely Oxford, Erie 
Co., O., IX, 2, 1895. 343362 Mark White, Arkansas City, Ark., 
VIII, 4, 1898. 353195 ——— no. 458a Swamps, Riley Co, Kan. 
353383 B. W. Everman, Lake Maxinkuckee, Ind. VIII, 15, 1899. 
Herbarium U.S. Dept. Agric. Tom A. Williams (2 specimens). 
1200 feet, Nebraska, VIII, 1, 1889. 
Herbarium N. Y. Bot. Garden.. B. F. Bush’s, 4176, Sully, 
Mo. X, 10, 1904, also B. F. Bush’s 4150. Dodson Mo. X, to, 
1904. J. B. Norton’s 292, Manhattan, Kan., VII. 22, ’95. L. M. 
Umbach, Dune Park, Ind. IX, 2, 1898. Paul J. White’s, Custer 
Co., Okla., VII, 21, 1900. Herbarium of Mr. Chas. Deam, Duplicate 
of the preceeding also of L. M. Umbach’s IX, 2, 1989, Dune Park, 
Ind. 
PERISCARIA VESTITA Greene, (1904) Leaflets, Vol. I, p. 38. 
B. C. Taylor’s, ————, Minn., VIII, 1892. N. Y. Bot. Garden. 
another specimen gathered at Brookings, S. D., VII, 1894. P. A. 
Rydberg’s 1613, Whitman, VII, 29, 1893. The lower leaf seems 
to be riparian or subaquatic. All from the Herbarium of the 
New York Botanical Garden. 
* Roman numerals indicate month collected, the others before the year 
show the date of the month. e. g. IX. 2, 1895 means Sept., 2, 1895. 
