Floristik, Geographie, Systematik etc. 351 



nental plants, and of these the larger part, about 15 per cent of the 

 whole number, extend as far south as Colorado and scarcely 2 

 per cent are confined to the Canadian Rockies. About one hundred 

 species are common to the old world. Besides the transcontinental 

 dement nearly 20 per cent more are common to some part of the 

 Rocky Mountain Region and some part of the Pacific mountains. Of 

 these about 5 per cent are equally distributed throughout both 

 provinces and 6 per cent limited to the northern part of both. The 

 remainder is about equally divided between Rocky Mountain plants 

 which have invaded the Cascades and Pacific plants found in the 

 Northern Rockies. 



The strictly endemic species constitute, nearly 60 per cent, 

 and if those which have invaded the Pacific mountains are added 

 the endemic dement comprises about 70 per cent of the flora. Of 

 the 60 per cent of strictly endemic plants fully one half are restricted 

 to the Southern Rockies, fully one fourth common to both, and less 

 than one fourth restricted to the Northern. 



Of the trees and shrubs found in the Subalpine Zone, eighteen 

 are trancontinental, eighteen are common to the Pacific mountains 

 or emigrants from them, nine are immigrants into the Canadian 

 Rockies from arctic region, and eighteen are endemics, five of 

 which have invaded the Cascades. Of the endemics, eight are 

 common to both the northern and the*southern Rockies, and five 

 are limited to each region; none of them are strictly local. 



The paper is divided into three parts. The first contains the 

 transcontinental species ranging throughout the Rockies, those con- 

 fined to the Northern Rockies and those limited to the Canadian 

 Rockies. 



The second part contains the species nearly equall3 T distributed 

 in the Rockies and the Pacific Mountains, the species common to 

 the Rockies and the mountains of the Great Basin, the species 

 common to the Northern Rockies and the Cascade Mountains, the 

 western immigrants from the Sierra Nevada and the Cascades, 

 which have invaded the Northern Rockies, the immigrants from 

 Alaska and the Arctic coast and the immigrants from the South. 



The third part contains the endemic species, which also have 

 emigrated into the Cascade Mountains, the endemic species com- 

 mon to the Northern and Southern Rockies, the endemic species 

 limited to the Northern Rockies, the endemic species restricted to 

 the Southern Rockies and the local endemic species. 



Jongmans. 



Safford, W. E., Desmopsis, a new genus of Anonaceae. (Bull. 

 Torrey Botan. Club. XLIII. p. 183—192. 1 Fig. PI. 7—9. 1916.) 



The two species hitherto named Unona pananiensis and U. bi- 

 bracteata are distinct from Unonopsis in the form of flowers and 

 the number and arrangement of the ovules. The author proposes 

 for them the new generic name Desmopsis. The new genus differs 

 from the Old World Desmos in its peculiar bracted leaf-opposed 

 inflorescence, the pilose indument of the torus between the stamens 

 as well as between the carpels, the depressed-globose hairy st}>-les, 

 and the crowded discoid seeds marked with a peripheral groove, 

 separated from each other by a sligt construction but never enclosed 

 in a moniliform pericarp. 



The paper contains a key to four species of the genus: D. bi- 



