Floristik etc. — Angewandte Botanik. 587 



sible here. The first excursions include pine barrens and salt marshes 

 near New York. In the Chicago region the excursions included 

 sand-dunes, forest, and low prairies, types familiär to ecologists 

 from the publications of H. C. Co wies and coworkers of the 

 Chicago school. Lincoln (Nebraska) was a center for high prairie 

 and forest, and Akron (Colorado) for examination of the Great 

 Plains. The features and origin of types of prairie and plains are 

 discussed at some Jength. The Rocky Mountains were examined 

 during a week spent in Pike's Peak region, under the guidance of 

 F. E. Clements. The natural Vegetation and irrigation cultivation 

 of the deserts of the Great Basin were seen near Great Salt 

 Lake — publications of Kearney, Briggs, and Shantz — , and 

 on the journey along the Snake River (Idaho). The Northwestern 

 coniferous Forests {Pseudotsuga) in Mount Rainier park and 

 other parts of Oregon next come under notice. The Yosemite 

 Valley was another forest centre, with studies in chaparral and 

 dry grassland nearer San Francisco. The Vegetation of the 

 Monterey Carm el, Salton Sea, and Arizona were demon- 

 strated by D. T. Mac Dougal, and other workers at the Desert 

 Laboratory. The Colorado Canyon, Sant Catalina, the Mexi- 

 can border at El Paso, and New Orleans mark further stages 

 of this great excursion. The Organisation of the whole excursion, 

 and the hospitality everywhere extended to the party are heartily 

 acknowledged. W. G. Smith. 



Taylor, N., Flora of the vicinity of New York, a contri- 

 bution to plantgeography. (Memoirs N. Y. Bot. Garden V. 

 p. 1-683. 7 pl. Jan. 30, 1915.) 



The bulk of the volume pages 47—651 is a catalogue of the 830 

 genera and 2651 species of plants growing within 100 miles of New 

 York as a center with notes on the length of the specific growth 

 periods and geographic distributions. The introduction, pages 1 — 37, 

 gives in 64 paragraphs a summary of the factors affecting the 

 distribution of the plants, the edaphic factors, and geologic history 

 and the effects of geologic changes on the distribution of plants 

 with a general discussion of the various floral Clements. Climatic 

 factors are discussed, and especially, the lenght of the growing 

 season. Harshberger. 



Hauch, L. A., Pro venien sforsög med Eg. [Provenienz- 

 versuche mit Eiche.] (Det forstlige Forsögsvesen i Danmark. 

 IV. p. 295—318, med 8 Fig. i Teksten, und deutschem Resume. 

 Köbenhavn 1914.) 



Um die Wirkungen der verschiedenen Provenienz an der Eiche 

 zu untersuchen, hat der Verf. einen Versuch im Staatswalde unweit 

 Sorö auf Seeland veranstaltet. In zwölf Parzellen wurden hier 

 in den Frühjahren 1909 — 12 Eicheln verschiedener Provenienz ge- 

 säet : Aus Dänemark, Hannover, Holland. Süd-Russland, 

 Oesterreich-Ungarn und Italien. Man verfolgte die Entwick- 

 lung der Kulturen durch Besichtigung in jedem Frühjahr und bei 

 verschiedenen sonstigen Gelegenheiten. Mit Ausnahme zweier Par- 

 zellen betrug die Pflanzenzahl im Sommer nach der Aussaat c. 200.000 

 pro Hektar; die Pflanzen verschiedener Provenienz weisten aber 

 auffällige Verschiedenheiteu auf: In den südrussischen und oester- 

 reich-ungarischen Parzellen hatten so gut wie alle Pflanzen Johannis- 



