432 BOTANICAL GAZETTE [JUNE 
those that occupy the same kind of soil and grow in company 
with it, are, strange to say, just the genera that were once con- 
sidered as representing a little natural group of plants: Diphyl- 
leia, Jeffersonia, Caulophyllum, Acta, and Cimicifuga. These | 
strikingly resemble one another in habit; moreover, they possess ° 
a number of biological peculiarities that might even lead to a 
more correct understanding of their true relationship than such 
smal] and insignificant floral characters as are used for the estab- 
lishment of “orders.” By taking the habit into consideration, 
we may sometimes reach a simple but much more natural idea 
of the plant and its nearest allies. 
BROOKLAND, D. C. 
BIBLIOGRAPHY. 
ARESCHOUG, F. W. C.: Beitrage zur Biologie der geophilen Pflanzen. Acta 
Reg. Soc. Phys. Lund 6:23. 18096. 
BERNHARDI: Ueber die merkwiirdigsten Verschiedenheiten des entwickelten 
Pflanzenembryo und ihren Werth fiir Systematik. Linnaea 7: 561. 
832. 
Bowers, H.: A contribution to the life-history of Hydrastis Canadensis. Bot. 
Gazette 16:73. 1891. 
BRAUN, ALEX.: Das Individuum der Pflanze in seinem Verhiltnisse zur 
Species. Abhdl. d. Kgl. Akad. d. wiss. Berlin 1853. 
DE Bary, A.: Vergleichende Anatomie der Vegetationsorgane der Phanero- 
gamen und Farne 258, 259, 436. 1877. » 
DE CANDOLLE, A. P.: Regni vegetabilis systema naturale 2: 31. 1821 
Dickson, ALEX.: On the germination of Podophyllum Emodi. Transact. Bot. 
Soc. Edinburgh 16: —, 1882 
EICHLER, A. W.: Bliithendiagramme 2: 137. 1878, > 
FOERSTE, AuG. F.: The May Apple. Bull. Torrey Bot. Club 11:62. 1884. 
Gray, Asa: Germination of the genus Megarrhiza. Am. Jour. Sci. III. 
14:—. 1877, 
‘Hance, H. F.: Podophyllum, a Formosan genus. Journal of Botany 21 ‘175. 
1883. « 
A second new Chinese Podophyllum. did. 361.- 
HILDEBRAND, FR.: Einige Beobachtungen an Keimlingen und Stecklingen. 
Bot. Zeitung. 50: —. 1892. 
Hom, THEODOR : Contributions to the knowledge of the germination of some 
orth American plants. Memoirs of the Torrey Bot. Club 2: 57- 1891. 
Be a I ee ge Ne Ee a ee ee 
