12 MISC. PUBLICATION 4 01, U. S. DEPT. OF AGRICULTURE 



is indicated by the statistical table recently given by St. John 30 of 

 the results of the Mangarevan Expedition. 



North America. — Alaska. — Hulten's Flora of the Aleutian Islands 

 and Westernmost Alaska Peninsula (1937), Porsild's Contributions to 

 the Flora of Alaska (1939), and several fairly modern local lists are 

 available, but there is no general flora except Rothrock's compiled 

 list of 1872. now of little more than historical value. A flora of 

 Alaska by Eric Hulten is in course of publication. 



Canada. — The only general list, by John Macoun, dates from 

 1883-90, with supplements by James M. Macoun extending to 1906. 

 Of the 15 Provinces and districts here recognized (including New- 

 foundland, politically not a part of Canada), only one-third possess 

 a modern list: Franklin (Simmons. 1913). Manitoba (Jackson and 

 others, 1922), Prince Edward Island (Hurst, 1933, an un- 

 annotated list), Quebec (Louis-Marie, 1931; also Marie-Victorin's 

 Flore Laurentienne. 1935. covering the southern part), Saskatchewan 

 (Fraser and Russell, 1937). There are older lists for Labrador 

 (Macoun, 1897), Xew Brunswick (Fowler, 1885. with additions to 

 1905), and Xova Scotia (Lindsay, 1877). none of which adequately 

 represents present knowledge, and a fair number of local lists. 



Central America — Of the eight Central American countries (in- 

 cluding Mexico), only three possess modern floras, all written by 

 Paul C. Standlev alone or in cooperation with other botanists (Brit- 

 ish Honduras, 1936: Costa Rica, 1937-38; Salvador, 1925). The 

 first contains brief descriptions of the woody plants, and the second 

 of the dicotyledons; the third is an annotated list only. Guatemala, 

 Honduras, and Nicaragua are quite without real floras, although two 

 of them are the subject of publications so miscalled; the two last are 

 the least known of Central American countries, but a few local lists 

 can be cited. Panama possesses, in addition to Seemann's now 

 ancient Flora (1852-51), Standley's Flora of Barro Colorado Island 

 (1933) and his Flora of the Panama Canal Zone (1928), the latter 

 with keys and often brief descriptions. Mexico, by far the largest and 

 richest in species of Central American republics, has had no complete 

 flora since the general one of Hemsley (Biologia Centrali- Ameri- 

 cana . . . Botany, 1879-88), which covered also the other Central 

 American countries and is now very far from representing the known 

 vascular plants. The gap is well filled, as far as woody plants are 

 concerned, by Standley's Trees and Shrubs of Mexico (1920-26), but 

 this includes probably less than half the total flora. The only com- 

 plete flora of any Mexican State is Standley's Flora of Yucatan 

 (1930), but there are also floras by Reiche of localities in the vicinity 

 of Mexico City and others of several islands by other authors as 

 well as Brandegee's papers on Baja California. 



Greenland. — The by no means extensive flora of Greenland 

 (scarcely 400 species) probably can boast of more pages of botanical 

 literature per species than that of any other region in this list. The 

 last complete list with localities and annotations is that of Lange, 

 as revised by Rosenvinge in 1892, but there are a comparatively 

 large number of carefully prepared lists of later date for different 

 parts of the island. 



* Bui. Bernice P. Bishop Mus. 133: 56. 1935. 



