600 SUMMARY OF CURRENT RESEARCHES RELATING TO 



The same writer has also published * an explanatory account of 

 Arthur's new nomenclature and arrangement of the Uredinales, which 

 have been divided into three families — Coleosporacere, Urediuiacea^, and 

 ^cidiacete. The different genera falling under these families are 

 enumerated, and reasons given for their position in the system devised 

 by Arthur. 



P. Magnus t contributes new observations that he has made on 

 species of Uromyces collected in the Tyrol from plants of the natural 

 order Leguminoste. He has made a more exact study of the markings 

 on the teleutospores and of the germinating pores. He was not able so 

 easily to correlate differences in the uredospores. The facts discovered 

 have enabled him to fix the identity of several species. 



Deformations caused byUredineae.ij: — Ed. Fischer cites two instances 

 of excessive alteration of tissue caused by the mycelium of a fungus 

 — the witches' brooms formed by Melampsoi'ella caryopltyllacearum on 

 Conifers, and the j^cidiwn of Uromyces Pisi on Euphorbia Cyparissias. 

 lii the latter case the leaves are broader and shorter and the whole shoot 

 longer. In general, alteration takes place on the axis by elongation of 

 the internodes, swelling of the stem, and by increased or suppressed 

 branching. On the leaves of the host, there is often abnormality of 

 form, and, in one case, jEcidium leucospermum induced the change of 

 vegetative leaves to flower leaves. Finally, in the effects on the flowers 

 there may be total suppression, or, more frequently, dwarfing of the 

 floral organs. 



Mycetozoa. 



Massek, G. — PMlippine Myxogastres. 



[A list of mycetozoa from the Philippine Islands, all of them already known 

 to science.] Phil. Journ. Sci., ii. (1907) pp. 113-15, 



Nadson, G., & A. Raits CHEN KG — Zur morphologic von Enteromyxa paludosa 

 Cienk. (On the morphology of Enteromyxa paludosa Cienk.) 



[The authors describe the growth and development of the organism, which 

 they consider to be a primitive Myxomj'cete.] 



Script. Bot. Hart. Univ. Imp. Petrop., sxiii. (1905-6) pp. 74-6 (4 pis.). 



liicliens. 



(By A. LoRRAiN Smith, F.L.S.) 



Mediterranean Lichens. § — The Lichens of the Islands Linosa and 

 Lampedusa, in the vicinity of Sicily, have been collected by G. Zodda, 

 and determined by Gr. Albo, who now publishes them with some notes. 

 Linosa is exclusively volcanic, and rises to a height of 200 metres, while 

 Lampedusa is formed entirely of dolomitic limestone. Owing to this 

 diversity of soil the lichen flora is very different, the only species common 

 to the two islands being Rocella tinctoria, R. pygmmi, Physica parietina, 

 and P. aureola. The writer lists 47 different forms for the two islands, 



* Journ. MycoL, xiii. (1907) pp. 89-94. 



t Ber. Deutsch. Bot. Gesell., xsv. (1907) pp. 2.50-5 (1 pi.). 

 X Ver. Schw. Nat. Gesell., Isxxix. (1907) pp. 170-7. 



* Bull. Soc. Bot. Ital., 1907, pp. 42-6. 



