Floristik, Geographie, Systematik etc. 507 



1911 et 1912. p. 347—340. Une planche hors-texte. Paru le mai 

 1913.) 



Description latine du Festuca Burnatii Saint- Yves de la section 

 des Variae § 1 Intravaginales Hackel, recolte par Leresche et 

 Levier dans la chaine des Cantabres, et pris vraisetnblablement 

 pour un F. ptimila lors de sa recolte. En terminant cette descrip- 

 tion, l'auteur donne la determination de tous les Festuca des Picos 

 de Europa recoltes par E. Levier et conserves ä l'Herbier de 

 Flore nee, oü ils etaient restes indetermines sauf un F. spadicea. 



G. Beauverd. 



Schaffner, J. H., Catalogue ofOhio Vascular Plants. (Ohio 

 Biol. Survey. I. 2. p. 127—247. 1914.) 



The 2065 species of ferns and flowering plants listed in this 

 bulletin are arranged according to phyletic Classification with notes 

 on the geographic distribution in the State, based mainly on speci- 

 mens in the State Herbarium, Botanical Laboratory, Ohio State 

 University. Harshberger. 



Shreve, F., A Montane Rain- forest: A Contribution to 

 the Physiological Plant Geography of Ja maica. (Carn. 

 Inst. Washington, Pubhc. 199. 110 pp. 29 pl. 18 figs. 1914.) 



The Blue Mountains ofjamaica are covered with a virgin 

 rain-iorest, in which some of the habitats are among the mostmoist of 

 the western hemisphere. A description of the ecologic and floristic 

 characteristics of the rain forest above 4,500 feet elevation is given, 

 and the various habitats of the region are described. The climatic 

 factors of environment are tabulated for the Blue Montain region 

 as a whole, and particular attention is given to the measurement 

 of the differences of climatic conditions which underlie the dissimi- 

 laterj^ of the conditions on the floor of the rainforest and in its 

 canopy. The periodicity of growth and flowering in the commonest 

 trees and shrubs is described, and detailed measurements of the 

 rate of growth are given. The influence of the low and constant 

 temperatures, the high percentages of cloudiness and fog, and ot 

 the high and sustained humidities of the rainforest are such as to 

 retard both photosynthetic and transpirational activity, an effect 

 which is registered in the slow rates of growth and is so pronoun- 

 ced as to make the montane rainforest a very unfavorable environ- 

 ment for plants as contrasted with tropical lowlands and the moist 

 temperate regions. Studies of the transpiration of plants from unlike 

 habitats within the rain forest indicate that dissimilarities of transpi- 

 ration behavior with respect to moisture conditions underlie the 

 localization of species in the several habitats. The normal daily 

 march of transpiration is described and the influence of the preva- 

 lent high rates of humidity and of darkness has been investigated. 

 The relative importance of stomatal and cuticular transpiration has 

 been ascertained. and the correlation of stomatal movements with 

 rates of relative transpiration has been determined for five species 

 of rain-torest plants. It has been found, in general, that plants of 

 the less humid habitats exhibit lower rates oif relative transpiration 

 than those of the most humid situations. Although darkness and 

 high humidity lower the rates of absolute transpiration, they do 

 not appreciably alter the rates of relative transpiration. A compari- 

 son of results with those obtained by other workers using the same 



