Experiment Station Record, Volume 92, January-June, 1945 Page: 26
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26 EXPERIMENT STATION RECORD [Vol. 92
of streptothricin, is such an organism. After detailed examination of a large number
of cultures from soils and composts, another organism morphologically and
culturally resembling A. griseus was found that produces an antibiotic apparently
combining many of the desirable antibacterial properties; because of its similarity to
streptothricin it is here designated "streptomycin." The two substances differ, however,
in the nature of their bacterial spectra as well as in their quantitative action on
different bacteria. It is suggested that they are closely related chemical compounds.
An experimental study of alternation of generations in Allomyces arbusculus,
W. R. HATCH and R. C. JONES. (Wash. State Col.). (Mycologia, 36 (1944), No.
4, pp. 369-381).-From experimental results reported it is concluded that drying and
nutrition affect the sexual-asexual ratio of the products of resistant sporangia. The
suggestion is made that the common practice of drying resistant sporangia for
several weeks before inoculating into water or weak nutrient cultures may have
been largely responsible for the fact that the products of such sporangia have
heretofore been reported as preponderantly sexual.
A species of Arthrobotrys that captures springtails, C. DRECHSLER.
(U. S. D. A.). (Mycologia, 36 (1944), No. 4, pp. 382-399, illus. 6).-Of the predaceous
fungi-numbering about 61-that have been made known both with respect
to the vegetative stage active in capturing animals and to at least one reproductive
phase sufficiently distinctive to provide a basis for identification, 3 are recognized
as preying mainly on rotifers, 5 on testaceous rhizopods, 24 on amebas, and 29 on
nematodes. The present contribution reports on a hyphomycetous fungus described
as A. entomoplga n. sp., which is unmistakably adapted to prey primarily on insects
and under natural conditions is presumably given wholly to a predaceous mode of
life. The springtail parasitized was identified as Sminthurides sp.; occasionally
various nematodes were also found destroyed by the fungus.
A new species of Metarrhizium active in decomposing cellulose, S. POPE.
(U. S. D. A.). (Mycologia, 36 (1944), No. 4, pp. 343-350, illus. 2).-M. glutinosum
n. sp. is described; it was isolated from deteriorated baled cotton in storage.
Saccardo's confusion of the spermatial stage of S[clerotinia] duriaeana and
S. curreyana with the Sphacelia stage of Claviceps nigricans, H. H. WHETZEL.
(Cornell Univ.). (Mycologia, 36 (1944), No. 4, pp. 426-428).
Fusarium-Monographie.-II, Fungi parasitici et saprophytici [Monograph on
the Fusaria.-II, Parasitic and saprophytic species, varieties, and forms], H. W.
WOLLENWEBER (Zentbl. Bakt. [etc.], 2. Abt., 106 (1943), No. 8-10, pp. 171-202,
illus. 27).-A taxonomic treatise of the group, including descriptions and synonymy.
Notes on the Ustilaginales of the world, III, IV, G. L. ZUNDEL. (Pa. State
Col.). (Mycologia, 35 (1943), No. 2, pp. 164-184, illus. 4; 36 (1944), No. 4, pp. 400412).-Included
in these installments (E. S. R., 87, p. 381) are species of Ustilago,
Sphacelotheca, Cintractia, Farysia, Mycosyrxr, Sorosporimn, Glomosporiumn,
Tranzschelia, Polysacccopsis, Melanopsichium, Tilletia, Urocystis, Entyloma, and
Doassansia, in the majority of cases involving new taxonomy.
Flora of Alaska and adjacent parts of Canada: An illustrated descriptive text
of all vascular plants known to occur within the region covered.-Part II,
Typhaceae to Poaceae, J. P. ANDERSON (Iowa State Col. Jour. Sci., 18 (1944), No.
4, pp. 381-445, illus. 132).-A second installment of the manual previously noted
(E. S. R., 90, p. 166).
Use of terms relating to vegetation, A. G. VESTAL. (Univ. Ill.). (Science, 100
(1944), No. 2588, pp. 99-100).-The recently increased and unprecedented awareness
of vegetation renders timely any discussion leading to a more accurate use of names
for certain vegetation types. The author makes certain suggestions regarding the
terminology of plant cover data.
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U.S. Department of Agriculture. Agricultural Research Administration. Office of Experiment Stations. Experiment Station Record, Volume 92, January-June, 1945, book, 1947; Washington D.C.. (digital.library.unt.edu/ark:/67531/metadc5064/m1/39/: accessed July 28, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.