844 . EXPERI14ENT STATION RECORD. [Vol. 37 



of Gloeosporium which is tentatively named G. camphorce n. sp., and a limb 

 cankor of camphor are briefly described. 



Diseases of cinchona, A. Rant {Meded. Kina Proefstat. [Dutch East Indies], 

 No. 2 (1914), PP- 47, pis. 11). — The author has listed \Aith brief discussion the 

 known diseases of adult plants of cinchona, grouped according to the portions 

 affected, namely, leaves, branches, stems, and roots, and also separately the 

 diseases affecting more particularly the young plants. 



A disease of pecan catkins, B. B. Higgins (Phytopathology, 7 {1911), No. 1, 

 pp. 42-45, figs. 2). — The author's attention was called during the spring of 1916 

 to an abnormality of the staminate catkins of pecans on the Georgia Experi- 

 ment Station plats. An examination of the catkins showed the presence of a 

 fungus in the infected anthers, which, while not killing the tissues outright, 

 caused many of the iK)llen grains to become empty and to collapse. 



A study of the trouble showed it to be due to a species of Microstroma. and 

 as a similar fungus was observed on the leaves of hickory trees, it was suspected 

 that the one on pecan was identical with that on hickory. Cultures of both 

 forms were obtained and some differences were noted. Diligent search indicated 

 that the fungus on pecan catkins differs from that ou hickory, and the organism 

 is technically described under the name il. juglandis robustum n. var. As iwUeu 

 is always produced in great abundance by pecan trees, the loss of a compara- 

 tively large amount is considered of little importance, but the author sugge.sts 

 that this disease may become serious in the future. 



Phytophthora on Vinca rosea, J. F. Da.«tub (.Mem. Depi. Agr. India, Bot. 

 Ser., 8 (1916), No. 6, pp. 23S-242, figs. 14). — During the wet period occurring iu 

 May and June, 1913, V. rosea suffered much from a parasitic fungus which 

 was diagnosed as a Phytophthora. The attack weakens or disappears in dry 

 weather and sunshine. The organism, which appears to be a weak parasite, 

 has been studied by the author aud Is considereil to be a biological strain of 

 P. parasitica, previously described by him as a new species attacking the castor 

 oil plant (E. S. R., 29. p. 548). 



Notes on some species of Coleosporium, G. G. Hedc.cock aud N. R. Hunt 

 (Abs. in Phytnpathology. 7 (1917), No. 1, p. 68). — C. delicatulum is reported 

 for the first time on two species of Euthamia, and the Peridermium form ou a 

 nunihcr of species of Pinus. The occurrence of C. laciniaria; on six speiies of 

 Laciniaria is also reported. 



The eecial stage of Coleosporium elephantopodis, G. G. Hedgcock and W. H. 

 Long (Abs. in I'hi/topathology, 7 (1917), No. 1, pp. 66, 67). — Young trees of 

 Pinus heterophylla in the greenhouse at Washington, D. C, inoculatetl with 

 teliospores of C. elephantopodis, are said to have producetl tecia of Peridermium 

 ear7ieum. Inoculations with leciospores on the leaves of Elephantopus tomen- 

 tosus produced both urediniu aud telia of C. elephaniopodis. Parallel sets of 

 inoculations of plants of Vernonla and Elephantopus gave results indicating the 

 identity of the two species of Coleosporium previously reported on the two 

 hosts. Peridermium cameum is reported for the first time on the needles of 

 Pinvs cariba'a, P. clausa, P. echinata, P. glabra, P. heterophylla, P. pondcrosa, 

 P. rigida, P. scopulorum, and P. serotina. 



An alternate form for Coleosporium helianthi, G. G. Hedgcock and N. R. 

 Hunt (Aha. in Phijlopatliology. 7 (/P77), No. 1, pp. 67, 68). — Peridermium 

 helianthi is described on Pinus inrginiana. Inoculations made with the reclo- 

 spores of the Peridermium ou Helianthus dceapctahis, II. divaricatus, H. gigan- 

 teus, II. gla Ileus, and //. hirsutus proved the Peridermium to be the aH.'ial stage 

 of C. helianthi. 



Some new hosts for Coleosporium inconspicuum, G. G. Hedgcock aud N. R. 

 Hunt (.'ibs. in Phytopathology, 7 (1917), No. 1, pp. 68, 69).— The Periderniiuui 



