412 SL'MMAKY OF CURRENT RESEARCHES RKLATING TO 



Uromyces Hordei were used to infect alternate hosts, with successful 

 results. 



J. F. Adams * describes some instances of internal uredinia. Usually 

 the spores are liberated bv the bursting of the cuticle lying over the 

 sori. Internal secidia were reported in Fuccinia aiKjustata on Lycopus 

 virginicus, and internal uredinia of Dkaeoma poculiforme on rye. In 

 the latter case the spores were liberated into the hollow stem. Internal 

 uredinia were found by the writer in the tissues of Nvjredo caryo- 

 phyllina. The leaves of that plant are succulent, and allow a wide 

 ramification of the rust mycelium ; the internal part of the mesophyll 

 was occupied by uredosori with well-developed spores. 



Norman G. Hadden f has collected a number of Uredineje in North 

 Devon. Some of them are new records for Great Britain, others ar^ 

 very rare species. The species were all obtained in the neighbourhood 

 of Lynton. He has found Uromyces striatus on TrifoUum procvmbeiis, 

 and Cronartium quercuum on a new host, Quercus Ilex. 



Five new species of RaveneUa are described ])y W. H. Long ; X three 

 of them from Texas, one from Florida, one from Arizona. They all 

 grow on Mimosacea?, and one of them, R. thornheriana, usually forms 

 small witches' brooms, consisting of a rather dense interwoven mass of 

 abortive branches. Four other species of the genus have been descril)ed 

 as also giving rise to " lu'ooms." 



E. C. Stakman and Louise Jensen § have made infection experiments 

 with Timothy rust, Fuccinia phleipratensis. They were able to inoculate 

 it on to Arena, Hordeimi, Secede, Dactylis, EJymus, Lolium, and Bromiis. 

 When the spores produced were compared, some variation was noted. 



Florensa y Condal || has reported a very serious outbreak of rust on 

 rice {Fuccinia Oryzse) in the Ebrodelta district in Spain. This was due 

 to a number of causes— diseased seed, bad methods of planting and 

 manuring, &c. The result was a complete failure of the rice crop. 

 I\Iany suggestions are made for the avoidance of the disease in future 

 seasons. 



K. von Keissler % describes a wide-spread infection of GcdanthvB 

 nivcdis by the rust Fuccinia Galanthi. The spore pustules appear on the 

 under side of the leaves in small spots, or cause a whitening of the leaf 

 which makes the fungus easy to be detected. 



Crocysporium.** — The single species, Crocysiwrium toridosum, has 

 been considered a Hyphomycete, but L. Plantefoil has made a cultural 

 study of it, and considers that it is an imperfect Basidiomycete. It 

 grows on rotten wood, which it covers with a white powdery felt. It was 

 figured and named by Corda, JEyerita. It is the presence of clamp con- 



* Mycologia, viii. (1916) pp. 181-2 (1 pi.). 



t Journ. Bot. Uv. (1916) pp. 52-4. 



X Bot. Gaz., Ixi. (1916) pp. 417-24. 



§ Journ. Agric. Ees., v. (1915) pp. 211-6. 



n Intern. Agrar. techn. Rundschau, vi. No. 3 (1915) ,pp. 514-5. See also Bot. 

 Centralbl., cxxxi. (1916) pp. 348-9. 



^ Oesterr. Bot. Zeitschr., Ixv. (1915) pp. 236-8. See also Bot, Centralbl., cxxxi. 

 (1916) pp. 406-7. 

 ** Rev. G6n. Bot., xxviii. (1915) pp. 97-116 (10 figs.). 



