Floristik, Geographie. Systematik etc. 283 



mining factor in the distribution of Vegetation in 

 Connecticut. (Bot. Gaz. LVI. p. 143—152. Aug. 1913.) 



During the summer of 1912 continuous evaporation records 

 were taken at numerous localities in the State by means of porous 

 clay cup atmometers and the results tabulated. Upon averaging the 

 results for the inland stations of the Highland and Lowland and 

 of the stations along the coast, it was found that the weekly water 

 loss, as recorded by the atmometers, was as foUows: Western 

 Higland, 137 cc; Central Lowland, 171 cc; Eastern High- 

 land, 173 cc; Coastal Region, 135 cc. It appears that the areas 

 dominated largely b}^ the mesophytic northern hardwood type of 

 forest, and the strip along the coast constitute areas of relativel}'- 

 low evaporation intensity; and that the rate of evaporation in the 

 Eastern- Higland, where oaks predominate in the forest, is some 

 what higher than in the Central Lowland, where the more me- 

 sophytic chestnut is the character tree. Harshberger. 



Nieuwland, J. A., Some new American Lythra. (Amer. Midi, 

 Nat. III. p. 265-270. May 1914.) 



Lythruni cordifoliuni , L. dacotmiuin , L. parvuluni, and L. fla- 

 gellare, the latter a manuscript name of Shuttleworth for which 

 a second choice L. teniie is suggested should nomenclatorial quib- 

 blers consider L. ßagellare inapplicable. Trelease. 



Pool, R. J., A study ofthe Vegetation ofthesandhills 

 of Nebraska. (Minnes. Bot. Stud. IV. 3. p. 184—312 with pl. 

 XXVI — XL and 16 text figures, colored map as frontispiece. 1914.) 

 This rather voluminous paper begins with an historic introduc- 

 tion followed by a consideration of area, position, geology and 

 soils, topography and drainage. The section on general plant-life 

 conditions deals with climatic and soll factors, much of the matter 

 in tabular form. The several plant formations of the Nebraska 

 sandhills are (A) the prairie-grass formation, (a) bunch grass asso- 

 ciation, (b) the Muhlenbergia association, (c) the blow out associa- 

 tion, (d) the spear-grass association, (e) the wire-grass transition 

 association; (B) the short-grass formation (a) the grama-buffalo-grass 

 association; (C) the broadleaf forest formation (a) the linden-cedar- 

 ironwood-ash association. (b) the paper birch association; (D) the yellow 

 pine formation; (E) the water-plant formation, (a) the pond weed asso- 

 ciation, (b) the water lily association, (c) the stonewort-naiad associa- 

 tion; (F) the marsh formation (a) the bulrush-reed-grass of this area of 

 North America, (b) the smartweed association. (c) the streamside 

 marsh association; (G) the meadow formation (a) the rush-sedge 

 wet meadow association, (b) the water hemlock association, (c) the 

 fern meadow association, (d) the hay meadow association, (e) the 

 willow thicket association. The last two sections treat of general 

 Vegetation and summary of successions. Under each formation. the 

 dominant, principal and secondary species are given. The plates 

 of two Photographie figures each embellish the text. 



Harshberger. 



Rydberg, P. A., Studies on the Rocky Montain flora. 

 XXVIII. (Bull. Torr Bot. Cl. XL. p. 43—74. Feb. 1913.) 



Contains as new: Thevmopsis ovata [T. montana ovata Rob.) 



