652 EXPERIMENT STATION EECOED, 



In the case of the false heartwood of the beech, the wood has not been in- 

 jured by the presence of the fungus, but on the contrary, is made more durable. 

 If the decay continues, the wood will ultimately be seriously damaged. 



The oak Oidium on the chestnut and beech, R. Fabneti (Riv. Patol. Veg., 

 Jf (1910), No. 16, pp. 2-'fl-2i3). — Attention is called to the presence of this 

 fungus on both the chestnut and the beech but so far over only very restricted 

 areas. 



On the black canker of the chestnut, E. Griffon and A. Maublanc (Compt. 

 Rend. Acad. Sci. [Paris]. 151 (1910), No. 2Jf, pp. ll-',9-1151; Bui. Trimcsi. Soc. 

 Mycol. France, 26 (1910), No. .',, pp. 371-3S1, pis. 3).— In a discussion of the 

 taxonomic position of the fungus supposed to be the cause of this disease, the 

 authors claim that it is due, at least in part, to Melanconis modonia, of which 

 Coryneum kiin;^ei castanew is only a conidial form and M. perniciosa a synonym. 



A new polyT)ore on incense cedar, G. G. Hedgcock (ilycologia, 2 (1910), 

 No. 3, pp. 155, 156). — The author describes as new Polyporus amanis, a fungus 

 which is claimed to be the cause of " pin rot " or " peclciness " in the heartwood 

 of incense cedar (Lihocedrns dccurrcns) in California and Oregon. 



The death of fir seedlings from Ehizina undulata, Eulefeld (Naturw. 

 Ztschr. Forst u. Landw., 8 (1910), No. 11, pp. 521-529, figs. 3 ) .—Attention is 

 called to the dying of nursery seedlings of this tree in circular areas, caused by 

 the progressive centrifii,gal growth of the soil fungus, R. undulata, and to the 

 subsequent occupation of the diseased areas by groundsel (Senecio vulgaris). 



The dying' of pine trees, K. von Tubetjf (Naturw. Ztschr. Forst u. Landw., 

 8 (1910), No. 11, pp. 529-533, figs. 2). — The author discusses a disease of pines 

 which kills out the stand of 35 to 40-year-old trees on large areas. The needles 

 turn yellow, fall off, growth ceases, and finally the entire tree dies, hastened 

 in the later stages by the attacks of wood-boring beetles and the blue-rot 

 fungus. 



An examination of the needles and roots of the diseased trees showed no 

 signs of fungus or other parasites. It is claimed, therefore, that unfavorable 

 subsoil conditions have caused the disease. The subsoil is composed of a limy 

 clay, impervious to water in wet weather and in dry seasons becoming flinty. 

 These conditions cause an abnormal horizontal growth and branching of the root 

 system, malformation of the roots, and a consequent general disturbance in 

 the nutrition which finally terminates in the death of the tree, 



A new leaf disease of the pine (Pinus sylvestris), E. Munch and K. von 

 Tubetjf (Naturw. Ztschr. Forst u. Landw., 9 (1911), No. 1, pp. 20-25, figs. 3). — 

 This is a further discussion (E. S. R., 22, p. 653) of this parasite, Hendersonia 

 acicola, in which its morphological and cultural characteristics and the present 

 distribution of the fungus are given. 



Witches brooms and branch knots of the stone pine. — II, Twig galls of 

 the olive, oleander, and stone pine, K. von Tubeuf (Naturw. Ztschr. Forst u. 

 Landw., 9 (1911), No. 1, pp. 25-.^, figs. 12). — In this, the second article on this 

 subject (E. S. R., 22, p. 749), the author reviews the work of various investi- 

 gators on the galls found on the twigs and branches of the olive, oleander, and 

 stone pine (Pinus cembra), and gives the results of studies made of fresh 

 material from the galls of the stone pine. 



In the material examined, large colonies of bacteria were found in the dis- 

 eased areas, a more detailed description of which will be given later. 



Bust of Tsuga canadensis, P. Spaulding (Science, n. ser., 33 (1911), No. 8^0, 

 p. 194). — A new species of rust (Cceoma tsugw) on the young shoots and green 

 cones of T. canadensis is described. 



A new Taphrina on Polystichum lonchitis, S. Herzfeld (Osterr. Bot. 

 Ztschr., 60 (1910), No. 7, pp. 249-254, figs. 8).— The author describes a new 



