﻿452 



BOTAX/CAL GAZETTE 



tion in these plants. Emphasis is laid upon the propagation by tubers, tuber- 

 aspect of the genus is inseparable from the ecology of the pond, for it deals 

 principally with the food supply afforded a large number of animals, ranging 

 from the larvae of Diptera to canvasback ducks. The paper is made more 

 valuable by its numerous plates and by an extensive bibliography.— Geo. D. 



Marine algae in fresh water.— Experimenting with several species of 

 marine algae, Miss Brown" 0 found that many soon died and disintegrated if 

 placed in fresh water, or even in sea water with a larger admixture of fresh 

 water. Other species, and notably Enteromorpha intestinalis, not only endured 

 almost pure fresh water for a period of about 4 weeks, but also seemed to grow 

 more rapidly in waters fresher than those of the sea. The factors involved in 

 this tolerance were not further analyzed.— Geo. D. Fuller. 



Thelephoraceae.— In continuing his studies of the Thelephoraceae of North 

 America, Burt* 1 presents Exobasidium, Tremellodendron, Eichleriella, and 

 Sebacina, with a full historical discussion, synonymy, and citation of stations. 

 The data in reference to the species are as follows: Exobasidium, 3 species; 

 Tremellodendron, 7 species (2 new species and 3 new combinations); Eich- 

 leriella, 5 species (2 new species and 3 new combinations); Sebacina, 14 species 



Species of Carex.— Mackenzie v in continuing his studies of Carex, 

 discusses C. straminea and some of its nearest allies, and also describes 8 mis- 

 cellaneous new species, chiefly western, as follows: C. festivella, C. Egglestonii, 

 C. Lunelliana, C. bulbostylis, C. onustra, C. Sheldonii, C. exserta, and C. rugo- 

 sperma.—J. M. C. 



Polyporaceae. — Overholts« has investigated certain critical forms of 

 Polyporaceae, discussing characters and technique, and presents his conclusions 

 in definitions of the 22 species considered.— J. M. C. 



* Brown, Lola B., Experiments with marine algae in fresh water. Puget 

 Sound Marine Sta. Publ. 1:31-34. 1915. 



«' Burt, Edward Angus, The Thelephoraceae of North America. IV and V. 

 Ann. Mo. Bot. Gard. 2:627-658. pi. 21; 731-770. ph. 26, 27. 1915. 



«' -M ackenzie, K. K., Notes on Carex. IX. Bull. Torr. Bot. Club 42:603-621. 

 1015- 



« Overholts, L. O., Comparative studies in the Polyporaceae. Ann. Mo. Bot. 



