338 SUMMARY OF CURRENT RESEARCHES RELATING TO 



phycefe, OsciUatoria Agardhii Gomont., Anahcena Jios-aqu(e Breb., and 

 Clathrocijstis aeruginosa Henfrey. The algaj are described, and the 

 author states that, although the association of Glatfiroci/stis and Anabfena 

 has often been noted, the combination of these with OsciUatoria Agardhii 

 to form a " breaking of the waters " is a new record. He mentions two 

 other instances of the " breaking " in waters near Frankfurt-am-Main, 

 formed by Botrgococcus Braunii and Ghromidina Rosanoffii respectively. 

 The second note in this paper consists of a detailed description of 

 a form of Cladophora rrispata Kiifcz., which grew in an aquarium 

 with Isoetes lacustris. The principal variations from the typical form 

 consisted in numerous ring-shaped constrictions of the cells, and in a 

 rich growth of rhizoids. The possible causes of this irregularity are 

 discussed. 



Fresh-water Algae of Brandenburg.* — E. Lemmermann publishes 

 the first instalment of his contriliution to the Cryptogamic flora of 

 the Mark Brandenljurg. He undertakes the treatment of the alga3, 

 and begins his work with a general account of the Schizophycete. This 

 is divided into sections and treated with considerable detail, including 

 remarks on ])arasites, symbiosis, polymorphism, etc. Then follows a 

 list of literature, in wliich 111 works are cited. In the systematic part 

 the author gives keys to the orders, families, genera, and species, with a 

 short diagnosis of each sjiecies, followed by the habitat and the distribu- 

 tion in Brandenburg. Synonymy, references to literature, and exsiccatte, 

 are often given as well. 



to' 



AlgaB of Roumania.t — E. C. Teodoresco publishes a list of the 

 algre, both fresh-water and marine, of Roumania, and adds many critical 

 notes of great interest. A few authors have published records from 

 time to time of alga* found in Roumania, but no complete list has 

 •ever yet appeared. The present author does not complete his work 

 in this paper, as he leaves out the Diatoms and some of the Schizo- 

 phycea^ ; but he proposes to study these groups very shortly. The 

 species here recorded were Collected from many different parts of the 

 country, but the majority of excursions were made in the neighbour- 

 hood of Bucharest, Jassy, and Dolirogea. The author collected princi- 

 pally in the plains and lower hills, but a certain number of plants 

 were collected in the Prahova district up to a height of 2500 m., in 

 the district of Xeamt up to 1900 m., and in the district of Gorj 

 up to about 2200 m. As regards the marine species, they were found 

 on the shores of the Black Sea, between Mangalia and Portita, and 

 on the edges of the salt lakes Razelm and Babadg. Except for this 

 stretch of shore of the Black Sea, all the coast belonging to Roumania 

 is formed of sand, and is therefore barren of algaj. Several localities 

 are mentioned in the rocky region as being good for marine algse, but 

 the richest flora is found at Constanta. 



Flora of Swiss Alpine Lakes. J — Tanner-Fullemann concludes 

 Ms report on the cryptogamic flora of the Alpine lakes by a study of 



• Kryptogamenfiora d. Mark Brandenburg, iii. heft 1 (1907) pp. 1-128 (figs.), 

 t Beih. Bot. Centralbl., xxi., 2te Abt. (1907) pp. 103-219 (7 pis., 89 figs, in text) 

 X Bull. Herb. Boiss., vii. (1907) pp. 225-36. 



