472 -BOTANICAL GAZETTE [DECEMBER 
bibliography of paleobotany. The first volume contains the titles of 1908, 
and is divided into two sections: (1) an author list (pp. 17), which includes 
309 entries; and (2) a subject list (pp. 200), by which one may find at once 
any plant referred to. The number of titles is increased by the fact that the 
list includes many papers on living forms which are related in some way to 
the interpretation of paleobotanical material. In these days, when paleo- 
botany is becoming such a Smit part of morphology, such a volume has 
become indispensable.—J. M. C. 
A revision of the genus Eucalyptus.—The title-page and index received 
recently completes the first volume of A critical revision of the genus Eucalyptus 
by J. H. Marpen.” In this volume the author treats 40 species, giving detailed 
descriptions, synonomy, distribution, and much supplementary information; 
these species and their known varieties and forms are illustrated by 48 admirable 
plates. The work is an exhaustive and authoritative treatment of this highly 
interesting and economically important group of plants, and it is a pleasure 
to note that it is being continued; the first part of the second volume, contain- 
ing nine species and four plates, has already been issued.—J. M. GREENMAN. 
Illinois State Academy of Science.—The third volume (1910) of Transac- 
tions contains the following botanical papers: The vegetational history of a 
blow-out (abstract), by H. A. Greason; Preliminary account of the forest 
successions on Isle Royale, Lake Superior (abstract), by W. S. Cooper; The 
forest associations of northwestern Illinois, by H. S. PEpoon.—J. M. C 
NOTES FOR STUDENTS 
Plant diseases. —BANCROFT™ has studied the life history of Cladosporium 
herbarum and finds that this fungus, known to be common on dead leaves, is 
connected with a parasitic stage which from its fructification would be classed 
in the form genus Hormodendron. The Hormodendron form makes holes in 
the leaves of many plants, among which are cucumber, melon, and cabbage. 
It is mentioned as epidemic in cucumber leaves. The holes are said not to 
be formed by the drying and falling out of areas of tissues, as in leaf-spot 
diseases. In this case the perforations occur from the first and increase in 
size, often running together so as to form large irregular holes. The margins 
are surrounded by a narrow line of dead brownish tissue. From the tissues 
surrounding the holes conidiophores of Hormodendron appear and produce 
branched chains of conidia. In cultures from these chains, conidia of Hormo- 
dendron were at first produced, but as the cultures became older only those of 
Cladosporium were formed 
Maren, J. H., A critical revision of the genus Eucalyptus. 4to. pp. 349- pls. 
48. Sydney: William Applegate Gullick. 1903-19009. 
 Bancrort, C. K., Researches on the life history of parasitic fungi. be Clado- 
Sporium herbarum Link. Annals of Botany 24:359-372. pl. 1. 1910. 
