218 SUMMARY OF CURRENT RESEARCHES RELATING TO 



Sydow, H. & P.— Fungi Paraenses. 



[The list includes a large proportion of new species.] 



Hcdivigia, xlix. (1909) pp. 78-84. 



,, ,, Einige neue resp. bemerkenswerte Pilze aus Sudafrika. (Some 



new and noteworthy fungi from South Africa.) 



[Six new species are described and others recorded, with 

 notes.] ' Ann. Mycol., vii. (1909) pp. 543-7. 



Lichens. 

 (By A. Loerain Smith.) 



Lichen Flora of the Saal Valley.* — H. Zsacke has published a 

 list of lichens he has collected, and along with it a short geological 

 sketch of the neighbourhood. The calcareous rocks vary greatly in the 

 amount of calcium contained in them, and this variation tells at once on 

 the lichen flora. Where the two types of rock with much or little 

 calcium are closely associated, the species of lichen may pass over from 

 one rock to the other, but they become untypical and show differences 

 both in thallus and size of spores. 



Russian Lichens.f — In his report on the vegetation of the Sseliger 

 Lake (Gouv Twer, Ostaschkow), Elenkin gives an account of the moss 

 and lichen formations in the neighbourhood of the lake, more especially 

 on the sandy soil. The most characteristic species were Stereocaulon 

 condensatum, Cladonia verticillata, Bacomyces roseus, B. byssoides, and a 

 new and interesting form, Placynthiella arenicola g. et sp. n. Some rare 

 crustaceous Lichens were also found on stones, e.g. Rhizocarpon postumum 

 and Acarospora oligospora. 



Lichens from Brazil. J— A Zahlbruckner has had charge of the 

 lichens collected by the Austrian Botanical Expedition of 1901 to South 

 Brazil. He has determined 297 species, many of them new to science. 

 He gives notes and new diagnoses of many species already known, 

 especially in Grapkidese, in which family the apothecia have often been 

 imperfectly described. The different groups are all fairly well repre- 

 sented, though the more noticeable foliose and fructiculose forms are the 

 most numerous. The Parmelise are specially abundant, and Zahlbruckner 

 gives a synoptic key to enable the students to determine these and other 

 specimens with greater ease. The paper is illustrated by five plates of 

 coloured photographs. 



Italian Lichens. § — In the present issue A. Jatta commences the 

 study of Heterolichenes. These he divides into (1) Epiconiaceaj, (2) 

 Discocarpaceae, and (3) Pyrenocarpaceee. The first includes only the 

 coniocarps, a comparatively small group. The second is the largest, and 

 consists of nearly all the foliose and fructiculose lichens as well as the 



* Zeitschr. Naturw., lxxx. (1908) pp. 231-53. See also Bot. Centralbl., cxxii. 

 (1910) pp. 91-2. 



t Bull. Jard. Imp. Bot. St. Petersbourg, ix. (1909) pp. 15-21. See also Hed- 

 wigia, Beibl.,xlix. (1909) p. 54. 



X Denkschr. k. Akad. Wiss. Math.-Nat. Kl., lxxxiii. 2 (1909) 125 pp. (5 pis.). 



§ Flora Italica Cryptogama. Lichenes, i. fasc. 2 (1909) pp. 113-264. 



