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June, 1820] MORPHOLOGY, BTC, OF FUNGI, ETC. 367 



2492. MURRILL, \V. A. A new species of Lentinus from Minnesota. Mycologia 11: 223- 

 224. 1919. — -A flesh-colored Lentinus from Itasca Park, Minnesota, is described as a new 

 species, L. Freemanii. — //. It. Rosen. 



2493. Muhrill, \V. A. Fungi from Ecuador. Mycologia 11: 224. 1919.— 28 species of 

 fungi collected by J. N. Rose are listed. — //. R. Rosen. 



2494. Murrill, W. A. Queer fungous growths. Mycologia 11: 225-226. 1919.— Simple 

 and irregularly branched structures found in Texas, varying in color from a dark-avellaneous 

 tint to a dirty-white, are described. Particles of sand are intimately mixed with fungous 

 mycelium although the central core is free from sand and presents the structure of some 

 vegetable matter. — // R. Rosen. 



2495. Orton, C. R. Notes on some polemoniaceous rusts. Mycologia 11: 168-180. 1919. 

 — Author presents a detailed study of type specimens representing some 20 odd described or 

 named species or varieties of rusts occurring on Polemoniaceae. Of this number 4 valid spe- 

 cies are recognized on these hosts and 1 species on a cruciferous plant. The valid species are 

 Allodus giliae (Peck) Orton, (Puccinia plumbaria Peck), under which 16 different synonyms 

 are listed, Allodus Douglasii (Ellis Sc Ev.) Orton, (Puccinia Douglasii Ellis and Ev.), with 

 3 synonyms, Aecidium Polemonii Peck, and Puccinia Giliae Hark. Puccinia arabicola Ell. 

 & Ev., which had been confused with P. plumbaria, is considered as a distinct species and 

 occurring on some crucifer, probably Cardamine Douglasii (Lam.) Britton, instead of occur- 

 ring on some species of Phlox. — //. R. Rosen. 



2196. Pole Evans, I. B., and A. M. Bottomley. On the genera Diplocystis and 

 Broomeia. Trans. Roy. Soc. South Africa 7: 189-192. PI. 19-22. 1919.— The genus Diplo- 

 cystis has been regarded as monotypic, and only recorded from Cuba, Bahamas and the West 

 Indies. A new species, Diplocystis Junodii, is described, collected in Portuguese East 

 Africa. In both genera a number of individuals arise from a common stroma; in Diplocystis 

 the stroma is rather thin and saucer-shaped; in Broomeia it is rather thick and somewhat 

 columnar. Two species of Broomeia, B. congregata Berk and B. ellipsospora v. Hohn., have 

 been recorded from South Africa, and a third, B. guadaloupensis Lev. from Guadaloupe. — 

 E. M. Doidge. 



2497. Rhoads, Arthur S. The biology of Polyporus pargamenus Fries. New York State 

 Coll. Forestry Tech. Publ. 11. 197 p., 21 pi., 6 fig. 1918. — Polyporus pargamenus Fries is 

 one of the most common fungi causing sap-rot in nearly all dicotyledonous trees throughout 

 its nearly cosmopolitan range. It is essentially a saprophytic organism but it frequently 

 becomes a wound-parasite in fire-scarred trees in the hard-wood forests of the eastern United 

 States. — Although the sporophores are subject to much variation, the various forms should 

 be considered as one species. It is, however, distinct from Polyporus abietinus Fries. 

 Spores are shed intermittently over long periods. The dried sporophores may revive and 

 produce spores after desiccation for at least a year. Spores kept dry for 10 months did not 

 lose their viability. Darkness is conducive to the most vigorous vegetative growth, but 

 light is necessary for the production of sporophores and spores. Basidiospores germinate 

 readily in both tap and distilled water as well as in many kinds of culture media. The 

 short-lived primary mycelium regularly produces oidia which give rise to secondary mycelium. 

 This secondary mycelium may break up soon into oidia or grow into the ordinary vegetative 

 mycelium and eventually produce sporophores. Chlamydospores may form in the secondary 

 mycelium. — Microscopic studies were made of the decay in 5 species of wood and macroscopic 

 studies in 28 other species of wood. Minor variations in the decay of different woods by this 

 fungus are dependent upon the dissimilar structure of the respective woods. Chemical stud ies 

 of the decay show that the humic by-products vary, but they are similar to those produced 

 by other wood-destroying fungi. — Forest sanitation is suggested as a means of control. — 

 L. H. Pennington. 



BOTANICAL ABSTRACTS, VOL. Ill, NO. 6 



