378 Floristik, Geographie, Systematik etc. 



Long. The author believes its presence is due to its growing on 

 the side away from the main body of pinebarrens, or on the side 

 protected from fire. Harshberger. 



Harshberger, J. W., The Origin and Vegetation of Salt 

 Marsh Pools. (Proceed. Amer. Philos. Soc. LV. p. 481—484. 10 

 figs. in 5 pl. 1916.) 



This paper is an account of the formation of salt marsh pools 

 by the smothering action of the dead drift material and wats of blue 

 green and other algae which cause a decay of the living plants 

 beneath. After the pool has been formed by a change in the drai- 

 nage of the marsh, the area of the depression may be retenanted 

 by the typic saltmarsh species. Harshberger. 



Harshberger, J, W., The Vegetation of the New Jersey 

 Pine-Barrens: An Ecologic Investigation. (XII, 329 pp. 

 284 figs. and 1 large colored map. Philadelphia 1916.) 



This book describes the physiography, geology and soils of 

 Central New Jersey, as these have influenced the distribution 

 and habitat relations of the plants. An historic description of the 

 pine-barren region and the industries influenced by the character 

 of the Vegetation are described. 



The Vegetation of the pine forest, the cedar swamps, the deci- 

 duous swamps, the cranberry bogs, the plains (Coremal), the river 

 banks and the ponds is treated in detail and constant reference is 

 made to the uses of the plants which grow in each of these areas. 

 The seasonal aspects of the Vegetation are considered, and in a 

 series of tables the flowering and fruiting period of each plant is 

 shown. 



The distribution and structure of the roots and Underground 

 parts of a series of pine-barren plants have been presented, as 

 well, as the microscopic structure of the leaves of a selected num- 

 ber of species. A sketch is given of the evolutionary principles 

 involved in a study of the plants of the region. Photographs, line 

 drawings and maps show the detailed character of the various plant 

 associations. The large colored map shows the distribution of the 

 main types of plant associations of the region. Harshberger. 



Millspaugh, C. F., Vegetation of Alacran Reef. (Publ. 187 

 Field Columbian Museum. Botanical Series. II. N*^ 11. p. 421—431. 

 April 1916.) 



After a description of the location of the reef on the Campeche 

 Bank in the Gulf of Mexico near the Yucatan mainland, Mill- 

 spaugh by means of several maps locates the 18 species of flowe- 

 ring plants collected by him. He finds two new species, viz. Cakile 

 alacranensis and Tribulus alacranensis which he believes have evol- 

 ved on the reefs. Harshberger. 



Nichols, G. F., The Vegetation of Connecticut. (Bull. Tor- 

 rey Bot. Club. XLIII. p. 235—264. Fig. 1 — 11. June 1916.) 



This is the fifth and final instalment of a paper previous 



