TRbooora 
JOURNAL OF 
THE NEW ENGLAND BOTANICAL CLUB 
Vol. 13. September, 1911. No. 153. 
TERATOLOGY IN TRILLIUM OVATUM PURSH. 
WALTER DEANE. 
(Plate 92.) 
THE many instances of teratology in the genus Trillium that are 
coming to notice more and more as greater attention is paid to this 
branch of botanical study, and observers are more on the lookout 
for these forms, seem to show the marked instability in the genus. 
I have already noted a number of cases (see RHODORA, x. 21-24 and 
214-216, 1908 and xii. 163-166, 1910) from New England and New 
York, and I take great pleasure in recording a most interesting in- 
stance in a species from the far west, T'rillium ovatum Pursh. Accord- 
ing to Mr. Charles V. Piper in his Flora of the State of Washington, 
comprising volume XI. of the Contributions from the United States 
National Herbarium and bearing the date 1906, the range of the 
species is “British Columbia to California and Idaho.” The type 
locality is **On the rapids of the Columbia River.’ Collected by 
Lewis, April 10, 1806, on which date he was at the foot of the Cascades 
of the Columbia.” The flower is white, turning purplish with age. 
It is through the courtesy of Mr. W. T. Putnam of Lake Cushman, 
Washington, a careful observer and an ardent lover of nature, that 
I am enabled to write the following description. In a letter dated 
Lake Cushman, Washington, May 24, 1911, Mr. Putnam writes, 
“A few days ago I found a specimen of the common Trillium of a 
most beautiful pink and white, not at all the purplish tinge which 
comes as the flower ages, which had no less than 18 petals. The 
flower is at present pressing....The root I have.” On June 17 I 
