189 
222. Peirce, Geo. J. Notes on Corticium Oakesii, B. & C., and Michenera artocreas, B. & C, 
(with plate). Bull. Torr. Bot. Club, New York, December!), 1890, Vol. xvn, 
No. 12, pp. 301-310. Clears up the question of the method of spore formation 
in Corticium Oakesii , B. & C., deciding the basidial spores to be borne on ba- 
sidia which are modified and developed paraphyses whose bristles have 
become larger fewer, longer, and more erect; and the conidial spores to 
appear upon similar bristles either bofore or after the formation of basidial 
spores. Decides the species of Corticium to be distinct from C. amorphum. 
Arrives at the conclusion in case of Michenera artocreas that a basidial stage 
does not exist, or is replaced by the conidial stage, which consists of flask¬ 
shaped mother cells containing single conidia and provided with flagellate tips. 
223. Pierce, N. B. The mysterious vine disease. Thirteenth Ann. Report California 
State Board of Horticulture, Sacramento, California, pp. 109-177. Compares 
the disease with folletage and vial nero, French and Italian diseases which 
bear a more or less close relation to it. Gives results of field and laboratory 
investigations, history of the spread and characteristics of the movements of 
the disease in California. Decides the malady not to be due exclusively to 
ordinary parasitic vine fungi, giving various views as to the cause of fol¬ 
letage and mal nero. 
224. Rex, Geo. A. Descriptions of three new species of Myxomycetes, with notes on other 
forms in century XXV of Ellis & Everhart, North American fungi. Proc. Aead- 
Nat. Sci., Philadelphia, Part n, April-September, 1890, pp. 192-196. Describes 
as new Phgsarum tenerum, Rex, No. 2489, N. A. F ,,Trichiasubfusca, Rex, No. 
2495, Tricilia erecta, Rex, No. 2496. Gives variations found to exist in Didy- 
mium eximium, Pk., No. 2493, N. A. F., and No. 2089, N. A. F., and thinks the 
two specimens distributed under these numbers referable to the above ex¬ 
tremely variable species. Redescribes, on account of inadequacy of former 
descriptions, Badhamia lilacina, Fr., No. 2494, N. A. F. 
225. -. Notes on the development of Tubulina cylindrica and allied species of Myx¬ 
omycetes. Bot. Gaz., December 26, 1890, Vol. xv, No. 12, pp. 315-320. Con¬ 
siders the formative plasmodium and subsequent stages in its relation to the 
systematic study of the Myxomycetes, citing various species to show the 
constancy of color in plasmodia of the same species. Expresses opinion that 
the color of corresponding stages of development of individual sporangia 
from plasmodium to maturity is always the same. Supports this view with 
observations upon Tubulina cylindrica, (Bull.), T. stipitata, and Siphoptychium 
Casparyi, Rostfki. 
226. Scribner, F. L. The Entomosporium of the pear and quince (with figs.). Orchard 
and Garden, Little Silver, New Jersey, September, 1890, Vol. xn, No. 9, p. 166. 
Discusses use of the word “ blight ” for the disease, and, together with popu¬ 
lar description and notes on distribution, gives as most effective remedy Bor¬ 
deaux mixture preceded by early treatments with simple solution of copper 
sulphate. 
227. -. Leaf spot disease of the plum and cherry ( Septoria cerasina, Pk.) (with figs). 
Orchard and Garden, Little Silver, New Jersey, October 1890, Vol. xn, No. 10, 
p.183 (2 columns). Gives popular description of fungus, with recommendation 
that copper sulphate be used as preventive. 
228. -. Fungus diseases of grapevines (with figs.). Ibid. With aid of figures, illus¬ 
trates characteristics of grape leaf-blight, black rot, and anthracnoso upon 
the leaf, quoting results of experiment in treatment of black rot by the De¬ 
partment of Agriculture. (See 195.) 
229. -. Bean rust (with figs.). Orchard and Garden, Little Silver, New Jersey, 
November, 1890, Vol. xn, No. 11, p. 200-201. With excellent illustrations, 
describes carefully, in popular language, the life-history of Uromyces phase- 
oli. Recommends spraying with copper compounds and destruction of all 
infected material in the fall. 
