BOTANICAL GAZETTE. 309 
the American Association for the Advancement of Science demonstrating the 
invariable presence of characteristic bacteria in the disease known as pear 
blight, which attacks pomaceous trees, and that the disease may be transmitted 
from tree to tree by inoculation. Since then the bacteria have been isolated 
and cultivated in artificial media, and the statements of the original paper fully 
—— _Americans should have credit for what little original work they 
0 accomplish in bacteriology.—J. C. A. 
The Cladophyls of Myrsiphyllum.—Gray’s Structural Botany is quite 
mond in stating (at least by implication) that the apparent leaves of Myrsi- 
= lum are vertically expanded, that is, are inserted edgewise on the branch. 
Ti we really and most obviously horizontally expanded, in the manner of 
halt sip lease The vertical position which they soon assume is the result of a 
98 _ twist, differing in this respect from Ruscus, in which the cladodia are 
Vertical from the first. Professor Dickson calls attention to this, in an inter- 
ening paper in the Transactions of the Botanical Society of Edinburgh, vol. 
os é But, although the fibro-vascular bundles are arranged in one plane (as 
ee in some species of Ruscus), yet he still regards the organ as a cladophyll. 
And the two elements of these bundles are disposed in the reverse order to 
that of the leaf. 
In this connection it should be noticed that Van Tieghem (in Bull. Soc. 
me France, xxxi., 81, 1884), maintains that this organ even in Ruscus is a 
eal, the first’ and only leaf of an axillary branch, or when floriferous, is a 
leaf with a connate branch.—A. GRAY 
8 Flowers of the Wild Strawberry.—In this locality, and in other por- 
on of the state where I have been this spring, the flowers 0 ragaria irgin- 
tana var, Iltinoense are as constantly polygamous as they are in cultivated vari- 
appear rather 
ren indications of stamens in these flowers. 
I — in color, and the numerous yellow stamens render 
in now tell almost invariably the sex of a fluwer ata dista 
H. Barney, Jr., Agricultural College, Mich. 
Uni Addenda et Errata.—In Dr. Koehne’s article on the Lythracee of 
nited States, vol. x, pp. 269-277, the following corrections are to be made: 
Page 269, line 7 from bottom, for unsymmetrical read symmetrical. 
Page 273, line 31, for 14 to 6} mm. read, 43-6} mm. 
Page 274, to L. lineare add New York, New Jersey, Delaware, Florida and 
4s; Cuba; Guanajuato and Vera Cruz, Mexico; Virginia, fide Elliott. 
nce of two rods.— 
the 
