THE WHITE WATERLILY OF :\IcGREGOR, IOWA. 

 HENRY S. CONARD 



At the meeting of this Academy held in Grrinnell one year ago 

 I reported some observations upon the white waterlily of Clear 

 Lake, lowa^. The present notes are made possible through the 

 kindness of Mr. H. C. Daubenberger of McGregor. Iowa, who 

 sent specimens to Grinnell from his home in the first week of 

 August, 1917. The package contained four flowers, three leaves 

 and a rhizome twenty-one inches long. 



The McGregor plant appears to be identical with that of Clear 

 Lake. The flowers are large, with an unusually large number 

 of peals ; stamens less numerous than at Clear Lake ; carpels the 

 same as at Clear Lake. The outermost petal is in some c.ises 

 oblanceolate, in others broadly spatulate. The peduncle is dull 

 brownish or faintly striped with brown. The leaf has 12 or 13 

 veins, with a very long principal area. The petiole was brown 

 striped in all three of the srpecimens sent to me. The rhizome 

 was %to 114 inches in diameter, ^nth two buds that gave evi- 

 dence of being incipient tubers. The stipules are nearly twice 

 as broad as long. 



There is therefore in Iowa a type of waterlily of fairly wide 

 distribution, combining characteristics of Xymphaea odorata 

 and N. tuberosa, and variable in respect to certain of these 

 characteristics. Further records from these and other localities 

 are greatly to be desired. 



iProc. Iowa Acad. Sci., Vol. 24, p. 449, 1917. 



Departmej^t of Botany, 

 Grinnell College. 



