44 
10. Thaxter, Roland. I. Smut of onions ( Urocystis cepulcc , Frost), 
(with plates). Annual Report of the Connecticut Agricultural Ex¬ 
periment Station for 1889. Report of the Mycologist. Issued March 
11. History; origin; general characters ; distribution and severity; 
conditions influencing prevalence and increase; dissemination; re¬ 
tention of germinative power by spores; occurrence or non-occur¬ 
rence in sets and seed onions; botanical history and relations; man¬ 
ner of infection; experiments for prevention; general precautions. 
A most admirable treatment of the disease in which the botanical 
history and origin as well as the practical points of inquiry are well 
worked out. As the fungus seems to enter the plant only beneath 
the ground all treatments of seedlings must be before they appear 
above the surface of the soil. Only powdered fungicides were ap¬ 
plied, scattered along the drills and slightly mixed with the soil be¬ 
fore the planting of the seed. Although the author is not warranted 
he believes from his tentative experiments in recommending the use 
of flowers of sulphur as a preventive of the disease, it appears to him 
at least a promising substance for that purpose; of much more value 
than powdered copper sulphate which prevents germination of the 1 
seed, or iron sulphate, and less expensive in cost and application than 
sodium sulphide. The cost with rows one foot apart when the fungi¬ 
cide composed of one part of flowers of sulphur mixed with an equal 
part of air-slaked lime is scattered evenly in the bottom of the drills 
and the seed planted almost directly upon it, will not exceed, exclus¬ 
ive of labor of application, 60 cents per acre. II. The onion mildew 
(Peronospora jSchleideni , Ung.), ibid. III. The onion Macrosporium 
{Macrosporium sarcinula , Berk. var. parasilicum , Thiim.), (with fig¬ 
ures), ibid. IV. The larger onion Macrosporium {Macrosporium Porri, 
Ell.), (with figures), ibid. Y. The onion Vermicularia {Vermicularia 
circinanSy Berk.), (with figures), ibid. YI. List of fungi parasitic 
upon members of the genus Allium , ibid. YII. Mildew of lima beans 
(Phytophthoraphaseoli, Thaxter), (with figures), ibid. 
11 . - On some North American species of Laboulbeniacece. Pro¬ 
ceedings of the American Academy of Arts and Sciences, pp. 5-14. 
March 15, 1890. A preliminary communication on American mem¬ 
bers of this order, to be supplemented by a more extended account; 
to form the second part of a proposed monograph of PJntomogenous 
plants. 
12 . Webber, H. J. Uredinial Parasites. Am. Nat., Yol. XXIY, No. 
277. January, 1890, pp. 75, 70. 
13. - Peridial Cell Characters in the classification of the Ure- 
diueae. Am. Nac., A r ol. XXIY, No. 278. February, 1890, p. 177. 
14. -Peculiar Uredineae (with plate). Am. Nat., Yol. XXIY, 
No. 278. February, 1890, p. 178. 
O 
