3(54 TWENTY-FIKST REPORT. 



T. ceniuum L. var. dcclinatum A. Gr. f. Billingtonii n. f. Flowers browu 

 with a slight tinge, here and there, of a purplish color. Named for one of 

 the discoverers. Mr. Cecil Billington. of Detroit. Ypsilanti, May 19, 1918, 

 No. 4850. 



Trillium grandiflorum (Mx.) Salisb. f. roseum u. f. Flowers rose-col- 

 ored. Ypsilanti, May 19, 1918, No. 4847; Birmingham, May 18, 1902, No. 

 767c. T grandiflorum is common throughout eastern North America. I have 

 .seen acres of it and probably many thousands of individuals without a ro.se- 

 oolored flower to change the monotony of the pure white of the oi^en woods 

 as far as the eye could detect them. In some localities rose-colored flowers 

 are more common than the normal white flowered form but such places are 

 few in comparison. In these localities, the rose-colored individuals appear as 

 though they had been rose-colored from the beginning and do not lose the color 

 even in the withered and shrunken petals. The nearby white flowered forms 

 when faded and wrinkled up are not rose-colored but present the dirty-white 

 or dull yellowish-white color characteristic of such conditions. It seems 

 probable that the "rose" and the "white" in this species are as permanent as 

 the "purple" and "white" in T. crectum L. or in T. ccrnuum L. 



T. grandiflorum var. ohovatum f. albiflobum n. f. (T. grandiflwum var. 

 ohovafuw O. A. F. Mich. Acad. Sci. Rept. 1918, p. 157; T. grumliflonim var. 

 parvum Gates Ann. Mo. Bo. Gard. IV. 58, 1917, as of the white flowered 

 forms). Flowers white. Farmington, May 19, 1917, No. 4443. The remarks 

 above concerning the color forms of the si^cies apply equally well to the color 

 forms of this variety. I may add that of the myriads of individuals observed 

 I have never seen the rose color beginning to develop in a white petal after 

 it had begun to fade. On the other hand. I have never examined a bud to 

 ascertain if the i)etals at that stage of dev«>lopni(Mit wcmv of a rose color. 



CASTANEACEAK. 



Qiiercus stelhita Wniig. The Post Oak reported in tin- LIOIli Annual 

 Report, Mich. Acad. S<i. j). 172, as Qucrcux h/nilii AValt, should have been, 

 listed as Qncrcun ulclUitu Wang. 



ARISTOLOt^HlAOEAE. 

 The flowers of the genus Asarum are said to be 3-merous. Mr. Walpole, of 

 Ypsilanti, has found .4. Can^jdcnse L. near that city to be 4-merous almost as 

 frequently as it is 3-merou.s. 



PERRICARIACEAE. 



I'i)lj/f/<rin(in tnniiJiifiitnn I.. ( /'. (iiiiitliihiuin var. (uiunticum Leyss. Fl. Ilal. 

 :!!>1, 1701 ; /'. atnpliihiiini var. piilnstrc Weig. Fl. I'om. 255, 1769, according to 

 Ascherson and Graebner ; I'. (i»iphibiiim var. »rtY«»s Moencii. Enum. PL Hass. 

 28, 1777). A glabrous aquatic with narrowly oblong-lanceolate acute floating 



