48 Rhodora [Fbbbuaby 



latifolia. There is no means of knowing which was actually published 

 first; and as there is an error in Lamarck's citation of synonyms and 

 some vagueness in his description of the cup of the fruit, it seems best 

 to take up Marshall's name as his description clearly refers to the 

 common Red Oak. 



If my idea that Quercus borcali.s and Quercw rubra of modern authors 

 are varieties of one species, to he distinguished as such, is correct, the 

 name of the species is Quercus borcali.s Michaux fils and the name and 

 synonymy of the variety is as follows: 



Qukiuts horealis, var. maxima, now comb. 



Quercus rubra, /3 Linnaeus, Spec., 99(> (1753). 



Quercus rubra l)u Hoi, Harhk. Baumz. ii. 2(>5 (excl. syn. Linnaeus & 

 Catesby, not Linnaeus, t. 5, f. 2 [1772]) and all later authors. 



Quercus rubra maxima Marshall, Arhust. Am. 122 (1785). 



Quercus rubra, a latifolia Lamarck, Encycl. Metk. i. 721 (excl. syn. 

 Plukenet) (1785). 



Arnold Arboretum. 



STAMIXODY OF THE PETALS IN AMELANCHIER. 

 C. A. Wratherby. 



Last spring I saw, for the first time in the field, the little shad-hush 

 with reduced petals which has been called Amclanchicr oblougifolia, 

 var. micropetala by Dr. Robinson, 1 .1. nantucketen&e by Mr. Bicknell,'- 

 and a hybrid of A. oblougifolia and .1. stoUmifera by Prof. Wiegand. 3 

 Since this was my first sight of it, I examined it with more than usual 

 care and presently notieed that, in many of the tiny petals, the margins 

 were inrolled and of a yellowish hue for a certain distance on each side. 

 Subsequent examination of the inrolled portion showed it to be thinner 

 than the rest of the petal and of a different cell-structure; and, in 

 the latter respect as well as in color, to be precisely similar to the walls 

 of the anther. Moreover, it contained more or less granular matter 



1 Bliodorn x. '.V.i. 



- Bull. Torr. Bot. Club xxxviii. 4">,i. 



3 lUioctom xiv. 133. 



