360 . BOTANICAL GAZETTE [april 



is illustrated by many very appropriate photographs. The form and structure 

 of trees are also carefully considered. The second part is devoted to a manual 

 of the trees of the state, and is well equipped with keys, glossary, and illus- 

 trative drawings. A noticeable feature of the illustrations of the individual 

 species is the drawing of the buds on a large scale. It is safe to say that it 

 will take a first rank among the numerous tree manuals now available. — Geo. 

 D. Fuller. 



Montane plants of the Rocky Mountains. — Rydberg, 23 in continuing his 

 studies of the flora of the Rocky Mountains, has added to the articles already 

 noted in this journal 2 * an investigation of the distribution of the montane 

 species. He finds about 1900 species in this zone, of which one-half are to be 

 regarded as typical inhabitants of this area. Less than 15 per cent are trans- 

 continental, while 53 per cent are endemic. A close analysis is made of the 

 constituents of the flora peculiar to the northern and southern portions of the 

 region as contrasted with that common to both. — Geo. D. Fuller. 



Sedge associations in Colorado. — In studying the sedges of northern 

 Colorado, Ramaley 2 * shows that the genus Car ex not only is of decided impor- 

 tance, but that species of this genus dominate many plant associations, particu- 

 larly in the montane, subalpine, and alpine regions. These associations are 

 either hydrophytic or xerophytic in character, and represent early stages in 

 succession, for as mesophytism is approached the sedges are replaced by 

 grasses and dicotyledons. The principal associations involved are briefly 

 described and their sedge components noted. Of the 44 species of Carex 

 listed, 20 are classed as hydrophytic, 15 as xerophytic, and 9 only as meso- 

 phytic. — Geo. D. Fuller. 



New African plants. — Engler, 26 in continuation of his studies of the 

 African flora, has described 45 new species of Sterculiaceae, 40 of which belong 

 to Hermannia, 29 new species of Guttiferae, and 3 new species of Vioiaceae 

 (belonging to Hybanthus). — J. M. C. 



A new genus of Umbelliferae — Thellung 27 has described a new genus 

 (Scandicium) of Umbelliferae from the Mediterranean steppe region and 

 Western Asia, based on Scandix stellata Solander. In addition to the species, 

 numerous varieties are described.— J. M. C. 



* Rydberg, P. A., Phytogeographical notes on the Rocky Mountain region. 

 VIII. Distribution of the montane plants. Bull. Torr. Bot. Club 46: 295-327- I 9*9- 



** Box. Gaz. 62:83-84. 1916; 63:423-424. 1917; 65:195. 1918. 



2 5 Ramaley, Francis, The role of sedges in some Colorado plant communities. 

 Amer. Jour. Bot. 6:120-130. fig. 2. 1919. 



Engler, A., Beitrage zur Flora von Afrika. XLVII. Bot. Jahrb. 55:350-400. 



1919. 



aus Fedde, Repertorium 16:15-22. 1919. 



Genus. Sonderabdruck 



