No. 3, January, 1922] ECOLOGY, PLANT GEOGRAPHY 151 



9S9. Nelson, J. C. Notes on Scleropoa. Torreya 20: 119-122. 1920. —Sderopoa rigida 

 (L). Griseb., which was collected at Salem, Oregon in May, 1917, has been found each year 

 since and seems to have thoroughly established itself. It has previously been known in 

 the U. S. A. only from stations on, or very near, the coast of the eastern and southern states, 

 with the exception of an accidental waif from South Dakota. The synonymy of the genus is 

 briefly outlined. — J. C. Nelson. 



990. Nicholson, Wm. Edw. Mosses from the Caspian and Black Sea regions. Bryologist 

 23: 90-91. 1920. — A list is presented of 21 mosses and2hepatics, with notes on distribution. — 

 E. B. Chamberlain. 



991. Offner, Jules. Remarques phytogeographiques sur les massifs du Vercors et du 

 Devoluy. [Remarks on the phytogeography of the massifs of Vercors and Devoluy.] Compt. 

 Rend. Acad. Sci. Paris 169: 1054-1056. 1919. — A comparison is made of certain features of 

 the plant geography of the alnine flora.«! of the regions. — V . H. Young. 



992. Parish, S. B. The immigrant plants of Southern California. Bull. Southern Cali- 

 fornia Acad. Sci. 19: 3-30. 1920. — The greater part of the paper is given over to an annotated 

 catalogue of the established introduced species in Southern California; there are 2S1 species 

 and varieties, 177 genera, and 41 families represented in the list. A bibliography of Cali- 

 fornia immigrant species is given, their introduction being divided into the following histori- 

 cal periods: Mission, Pioneer, and Railway. The environmental conditions under which the 

 species grow are discussed. — Roxana Stinchfield Ferris. 



993. Samuelson, Gunnar. Mossor fran Eergens skargard. [Mosses from the islands 

 near Bergen, Norway.] Bergens Mus. Aarbok Naturv. Raekke 1917-18'^: 23-25. 1920. — 

 The list includes hepatics and mosses. — A. Gundersen. 



994. Setchell, William Albert. Geographical distribution of the marine spermato- 

 phytes. Bull. Torrey Bot. Club 47: 533-579. 1920. — The marine spermatophytes belong to 

 the families Hj'drocharitaceae and Potamogetonaceae, with a total of 8 genera and 34 or 35 

 species. These are plants all parts of which are subjected to the same conditions of tempera- 

 ture; they show the same temperature-zone relations as do the marine algae, most species 

 being confined strictly to 1 temperature-zone, a few extending over 2 or more. Much ad- 

 ditional information is needed to understand the factors concerned in the extensive distribu- 

 tion of some of these plants. — P. A. Mum. 



995. Ward, H. A. A new station for Gaylussacia brachycera. Rhodora 22: 167-168. 

 1920. — A 3rd station for this species, near Losh's Run, Perry County, Pennslyvania, is re- 

 ported. The colony covers the northern slope of a mountain ridge for fully a mile, averaging 

 about 200 feet in width. The whole colony has apparently spread by root from a single plant. 

 Later explorations on neighboring ridges brought to light 3 additional colonies, covering a 

 large area and all confined to the northern slopes. — James P. Poole. 



996. Woodward, R. W. Panicum albemarlense in Connecticut. Rhodora 22: 182. 

 1920. — A new station is reported for this species in Franklin, Connecticut. — James P. Poole. 



997. Yuncker, T. G. A list of Indiana mosses. Proc. Indiana Acad. Sci. 1920: 231- 

 242. 1921. — The author has brought together all the available recorded and unrecorded 

 lists of mosses for the state of Indiana. His report includes 174 species, 32 of which are listed 

 from Indiana for the first time. Under each species data are given regarding stations and the 

 names of collectors. — F. C. Anderson. 



APPLIED ECOLOGY 



998. Johnson, E. Water hyacinth. Monthly Bull. Dept. Agric. California 9: 77-80. 

 1920 — The water hyacinth {Eichhornia crassipes Solms.), a native of tropical South America, 



