476 Floristik, Geographie, Systematik etc. 



Harper, R. M., The Relation of Climax Vegetation to 

 Islands and Peninsulas. (Bull. Torrey bot. Club XXXVIII. 

 p. 515—525. Dee. 1911.) 



The object of this paper, based on numerous observations along 

 the Atlantic coast, is to prove that the climax Vegetation of the 

 coastal islands, and elsewhere, consisting largely of broadleaved, 

 evergreen trees and shrubs, forming a dense shade, in contrast to 

 the adjoining open pine-barren Vegetation with iittle undergrowth 

 is due to the action of forest fires in sweeping periodically through 

 the pine-barrens leaving the island Vegetation protected by lagoons 

 and water Channels in a climax condition. Harshberger. 



Harper, R. M., The River-bank Vegetation of the lower 

 Apalachicola, and a new Principle illustrated therebv. 

 (Torreya XI. p. 225—234. 1911.) 



This paper contrast the Vegetation of the upper and lower 

 estuarine portions of the Apalachicola River. The different 

 species of the two regions are placed in parallel columns and the 

 author concludes that the Vegetation near the mouth of the river 

 is farther removed from the climax condition than that higher up, 

 and that most of the swamp plants confined to the more inland 

 portion of this and similar rivers simply require (or tolerate?) more 

 seasonal fluctuation of water than those of the estuarine swamps 

 and vice versa. Harshberger. 



Heller, A. A., New co mbinations. V. (Muhlenbergia. VII. p. 

 123—124. Jan. 25, 1912.) 



Capnoides Wetherillii (Corydalis Wetherillii Eastwood), Radicula 

 hispida (Brachylobus hispidus Desv.), R. integra (Roripa integva 

 Rydb.), R. pectinata (Ror. pectinata Nels.), R. Underwoodii (Ror. 

 Underwoodii Rydb), R. Williamsii {Ror. Williamsii Britt.), Campe 

 orthoceras (Barbarea orthoceras Ledeb.), C. planisiliqua (B. planisili- 

 qua Mey), C. rivularis (B. rivularis Märten), and C. vema {Erysimum 

 vernum Mill.). Trelease. 



Hough, R. B., The American Woods, exhibited by actual 

 specimens and with copious explanatory text. Part 

 XII. Representing twentyfive sets of sections. (Low- 

 ville, N. Y. Published and sections prepared by the author. 1911.) 



The text includes a key to the trees of the northern United 

 States and Canada, based upon leaf-characters and a systematic 

 study of the species represented — each by radial, tangential and 

 cross sections of the wood — in the present fascicle. Trelease. 



Lämmermayer, L., Die grüne Pflanzenwelt der Höhlen. 

 I. Teil. Materialien zur Systematik, Morphologie und 

 Physiologie der grünen Höhlenvegetation unter be- 

 sonderer Berücksichtigung ihres Lichtgenusses. 

 (Denkschr. ksl. Akad. Wiss. Wien, math.-nath. Kl. LXXXVII. p. 

 325—364. 5 Textfig. Wien 1911.) 



Vor allem eine genaue Schilderung der grünen Vegetation von 

 26 verschiedenen Höhlenlokalitäten der Ostalpen. 



