426 Floristik, Geographie, Systematik etc. 



root-absorbed, salt-containin^ water by the intake of leaf-absorbed, 

 Salt free water is the most important effect of rainfall on hygrophi- 

 lous Vegetation. W. G. Smith. 



Sudre, H., Materiaux pour l'etude du genre Hieraciuni, 

 (Bull. Geogr. Bot. XXII. p. 51-61. 1912.) 



Diagnoses de quelques especes ou varietes nouvelles et obser- 

 vations sur des formes critiques. Especes nouvelles: H. glancophyl- 

 loides Sud. (i7. hastile X ii- ajuplexicaule}), des Pyrenees, H. 

 Missbachiaman Sud., de Boheme, H. titanogenes Sud., H. hispidi- 

 factitjji Sud. et H. exjiense Sud., ces trois derniers des Pj^renees. 



J. Offner. 



Sudre, H., Materiaux pour l'etude du genre Hievacium. 

 Fragment II (19 13). (Bull. Geogr. Bot. XXIII. p. 74—87. 1913.) 



Especes nouvelles: Hieraciuni hastilifovme Sud. {H. hastile A..T. 

 et Gaut. p. p.), H. lasiophylloides Sud., separe comme sous-espece 

 de H. candicans Tausch, H. lanceiferinn Sud., H. ciiierellum Sud., 

 H. sienopodiim Sud., H. Revolii Sud., B. va/de/oliosuni Sud., et r\om- 

 breuses varietes. J. Offner. 



Sudre, H., Materiaux pour l'etude du sfenre Hieraciuni- 

 Fragment III (1914). (Bull. Geogr. Bot. XXIV. p. 172-185. 

 1914.) 



Les nouveautes sont: H. reguläre Sud., voisin de H. alatum 

 Lap., H. luriduluni Sud., H. subalatiforme Sud. et H. Guilhotii Snd., 

 voisins de H. anglicuni Fr., H. viridibifiduni Sud., forme de H. bi- 

 fidum Kit. Au H. rigiduni Hartm. var. asperitni Rou}^ est donne le 

 nom de H. dryniophilum Sud. J. Offner. 



Vestal, A. G., A Block-Soil Prairie Station in North- 

 eastern Illinois. (Bull. Torr. Bot. Club. XLI. p. 351 — 363. 7 

 figs., including sketch map. July 1914.) 



The prairie, studied by Vestal, like that of others in the Chi- 

 cago-end of Illinois, is largely mesophytic and is of 3 facies: 

 1) the Andropogon furcatus prairie, 2) the mixed grass prairie, and 

 3) the Silphium terebinthaceuni prairie. Mesophytic prairie-grass 

 ma}'' be derived either from moist growths and swamp prairie or 

 fen, or from xerophytic prairie-grass, represented in the area 

 chiefly by Silphium terebinthaceum prairie. Sunn}' forest borders 

 show an outer zone of sunflowers, a shrubzone of dogwood, occa- 

 sionally with hazel, or alder, and sometimes a low-tree zone ma}^ 

 be Seen. Shaded borders show less definite and narrower zones, 

 with tall mesophitic herbs, climbers and usualh' dogwood. 



Harshberser. 



Vestal, A. G., Prairie Vegetation of a Mou ntain -Fron t 

 Area in Colorado. (Bot. Mag. LVIII. p. 377 — 400. With 9 figs. 

 Nov. 1914.) 



This account is based on a study, during the past three sea- 

 sons, of plant associations in the Great Plains region and of their 

 modifications along the mountain-front. The region is first described 

 and the diverse character of the Vegetation is sketched. Then fol- 



