426 abstracts: botany 



along meridional lines. When out of 51 species collected as far south- 

 ward as Beaufort there are included as many as 12 species that have been 

 found on the west coast of Europe and also on the west coast of North 

 America, it seems scarcely possible to come to any other conclusion. In 

 the third place, there is further evidence of the relationship of the 

 hydroid fauna of Beaufort and the Bermudas, 9 out of the 11 species 

 common to both localities being forms that would likely be carried on 

 the sargussum with the Gulf Stream. Finally, there is added evidence, if 

 such be needed, that there is no limit to the distribution of hydroid 

 forms, Beaufort, in low latitude, being connected by hydroid distribu- 

 tion with such distant places as Australia, Chile, Bering Sea, and the 

 White Sea, all in high latitudes, and having not one but several species in 

 common with Beaufort. Ethel M. Smith. 



BOTANY. — The North American species of Nymphaea. Gerrit S. 

 Miller, Jr. and Paul C. Standley. Contribution U. S. National 

 Herbarium, 16: 63-108, pis. 35-17, figs. 2-40. 1912. 

 This is a monograph of the species of Nymphaea, the yellow-flowered 

 pond lilies, of North America. Heretofore about half a dozea forms have 

 been recognized within this area, but the number is here increased to 19, 

 of which 10 are described as new. The study was based principally 

 upon a large series of fresh specimens, obtained during a period of several 

 years, but in addition the herbarium material of all the larger collections 

 was examined. The genus has a wide distribution in North America, 

 occurring in all of the divisions of the United States except two, and rang- 

 ing north to Alaska, and as far south as Mexico and Cuba. Most of 

 the new species are from the region bordering the Gulf of Mexico, but 

 one is from the Ozark plateau of Missouri and Arkansas, and one from 

 the coastal plain of New Jersey. All the species are illustrated with 

 half-tones or line drawings, or both. P. C. S. 



