150 
and even heptamerous flowers, which, in addition to the normal 
trimerous ones, have all been borne at the same time. The mod- 
ifications have resulted from the addition of parts. E 
Trees and Tree Planting in Massachusetts.—Some additional notes 
upon. C.8. Sargent. (Ann. Rep. Mass. State Board Agric., 
1886, p. 21.) 
Vaucheria.— Some abnormal forms of. Douglass H. Campbell. 
(Amer. Nat., xx., pp. 552, 553; seven figures.) 
Weeds mentioned in the Wisconsin Weed Law of 1884-5, and 
several other weeds. A. B. Seymour. (Third Ann. Rep. 
Agric. Exper. Station Univ. Wis., pp. 145-167; reprinted.) 
The weeds that most need to be exterminated in Wisconsin 
are the Canada Thistle, Common Thistle, Burdock, Ox-eye 
Daisy, Cocklebur, Beggar’s Lice and Couch-grass. Illustrations 
of all these are given, with notes on their introduction, and pos- 
sibilities of their destruction. | 
Winter.—Botany in. Byron D. Halsted. (Amer. Nat., xx., pp. 
553-556.) 
Teachers will find this helpful. 
Wisconsin Parasitic Fungt.—Preliminary List of. William 
Trelease. (Trans. Wisc. Acad., vi., pp. 106-144.) 
Two hundred and sixty-eight species are enumerated, all of 
which have been examined by the author. The host plants are 
given, and a useful index to them is appended. 
Woods and their Destructive Fungi. P.H. Dudley, C. E. (Pop. 
Sci. Month., xxix., pp. 433-444; illustrated.) 
This is the first of two articles in which Mr. Dudley brings 
before the public some of the results of his investigations of woods 
and the causes of their decay. After calling attention to the in- 
_ juries suffered by some of the specimens in the Jesup collection 
at the Am. Mus. of Nat. Hist., he proceeds to show the differences 
in microscopic structures of various woods, and _ has selected four 
of his beautiful photo-micrographs as illustrations. The Gymno- 
‘sperms are represented by Pznus palustris and Chamecyparis 
spheroidea (White Cedar), and the Angiosperms by Quercus alba 
and Liriodendron tulipifera. After lamenting the fact that lum- 
bering is now carried on throughout the year, and calling atten- 
tion to the fact that timber cut in the spring growth will be most 
