132 NATURAL, HISTORY BULLETIN. 



trichophyi 7 'urn Bossch, Prodr. Fl. Bat. 5, 1850; Ranuncu- 

 lus aqiiatilis var. trichophyllus A. Gray, Man. Ed. 5; p. 

 40, 1867; Ranunculus aqiiatilis var. caespitosiis DC. Prodr., 

 vol. 1, p. 26, 1824. 



Our species grows in the soft mud in shallow water and 

 is wholly immersed except the flower which is borne on a 

 stout peduncle and spreads its floral envelops just above 

 the surface of the water. The time of blooming is during 

 the months of June, July, and August. Owing to the dry 

 years and the constant drainage of the ponds this species is 

 rapidly diminishing but may yet be found rather frequently 

 in favorable locations. A pond of still water with this spe- 

 cies in full bloom presents a pleasing picture. 



Specimens before us are from Winneshiek, Fayette, and 

 Muscatine counties. The State University herbarium has 

 in addition specimens from Delaware county and other 

 localities. Profs. Bessey and Pammel report the species 

 from Hamilton county; and Messrs. Barnes, Reppert and 

 Miller from Scott county. 



Bessey, Contr. to the Flora of Iowa in Fourth Report of Iowa Agr. 

 Col., p. 91, 1872; Arthur Contr. to the Flora of Iowa, p. 5, 1876; Fink, 

 Proc. Iowa Acad, of Sciences, vol. 4, p. 83; Fitzpatrick, Proc. Iowa 

 Acad, of Sciences, vol. 5. p. 108; Manual of the Flowering Plants of 

 Iowa, p. 3; Pammel, The Plant World, vol. 2, p. 44; Barnes, Reppert 

 and Miller, Proc. Davenport Acad, of Nat. Sciences, vol. 8, p. 201. 



Batrachium divaricatum {Schrank) Wimm. Stiff 

 White Water Crowfoot. 

 Similar to the preceding, but leaves one inch long or 

 less, sessile or nearly so, rigid, not collapsing; stipules con- 

 spicuous. Ranunculus divaricatus Schrank, Baier. FL, 

 vol. 2, p. 104, 1789; Ranunculus circinatus Sibth., J. E. 

 Smith, Fl. Brit., vol. 2, p. 596, 1800; Ranunculus aqiia- 

 tilis var. divaricatus A. Gray, Man. Ed. 2, p. 7, 1856. 



This species is found in similar situations and during the 

 same months as the preceding. It ranges quite extensively 

 over the United States, being found in New England, New 

 Jersey, Pennsylvania, Ontario, westward to the Pacific 



