520 BOTANICAL GAZETTE [JUNE 
teleutospores, that this rust normally maintains itself by means of the hibernat- 
ing uredospores 
In a paper which is the eleventh of a series of reports on his well-known 
cultural work with plant rusts, carried on since 1899, ARTHUR gives the results 
of the cultures of 1910.8 The work of that year was under the immediate 
charge of Miss Irma A. UnDE. Sowings of spores of 21 species of rusts on a 
large number of possible aecidial hosts gave no infections. Successful cultures 
with 34 species supplemented or confirmed the results previously obtained either 
by the author or by other American and European investigators. The follow- 
ing six forms have been connected with their antithetic generation for the 
-first time: Puccinia Crandalii Pam. & Hume on Festuca confinis Vasey and 
Symphoricarpus racemosus Michx.; P. quadriporula Arth. on Carex Goodenovii 
J. Gay and Aster paniculatus Lam.; Puccinia Lithospermi E. & K. on Evolvulus 
pilosus Nutt., autoecious; Uromyces acuminatus Arth. on Spartina Michauxi- 
ana A. S. Hitch. and Polemonium reptans L.; Coleosporium Vernoniae B. 
on Vernonia crinita Raf. and Pinus Taeda L. (aecidiospores sown on Vernonia) ; 
and Melampsora Albertensis Arth. on Populus tremuloides Michx. and Pseudot- 
suga mucronata (Raf.) Sudw 
The host relations of some of the Peridermium rusts in Nova Scotia have been 
studied by FRASER,™ who, in addition to a number of field observations, reports 
cultures with the following forms. Teleutospores of Melampsoropsis Cassan- 
drae (Peck and Clinton) Arth. from Chamaedaphne calyculata (L.) Moench sown 
on Picea rubra (Du Roi) Dietr. produced Peridermium consimile Arth. & Kern. 
Teleutospores of M. abietina (Alb. & Schw.) Arth. from Sedum groenlandicum 
Oeder also sown on Picea rubra produced Peridermium abietinum (Alb. & Schw.) 
Thiim. M. ledicola (Peck) Arth. from Ledum produced Peridermium decolorans 
Peck on Picea canadensis. One form, Uromyces Peckiananus Farlow on Dis- 
tichlis spicata (L.) Greene, not belonging to the Peridermium rusts, produced 
aecidia on Atriplex patula var. hastata (L.) Gray and Chenopodium album 
FISCHER’S'S review of the work done on the biology of rusts in 1910 will = 
of interest to students of this group.—H. HassELBRING. 
Cytology of the Basidiomycetes.—Among the many papers which have 
lately appeared on the cytology of the higher fungi, three are of more than usual 
interest. Fries,” in a brief paper on Nidularia, finds the mycelium and young 
basidia binucleated, the nuclei having the chromatin in two conspicuous 
masses. The nuclei increase in size with the growth of the basidium, gradually 
™3 ARTHUR, J. C., Cultures of Uredineae in 1910. Mycologia 4: 7-33. 1912. 
14 FRASER, W. P., Cultures of some heteroecious rusts. Mycologia 3:67-74. 1911. 
15 FISCHER, Ep., Die Publicationen iiber die Biologie der Uredineen in Jahre 1910. 
Zeitschr. Bot. 3:620-623. IgIt. 
6 Fpres, Ros. E., Uber die cytologischen Verhiltnisse bei der Sporenbildung von 
Nidularia. Zeitschr. Bot. 32145. 1911. 
