8 



of temperature inversions must be very marked. More interest- 

 ing, however, is the behavior of certain species normally mem- 

 bers of the swamp associations, which here are near or at their 

 northern limits. They are Rliaiunus caroliniana, Adelia acuvii- 

 nata, Celtis mississippiensis, Plancra aquatica, and Ilex dcadua. 

 Of these clU but Plancra are abundant in the swamps along the 

 Mississippi River bayous, and to some extent also in the cypress 

 swamps along the Ohio River. But they occur also on the dry 

 rocky sides and tops of certain hills in Jackson County, 50 meters 

 or more above the bottoms, where the soil is a thin clay and the 

 forest cover very loose. The appearance of these plants asso- 

 ciated with such xerophytes as Ulnius alata, Sassafras Sassafras 

 and R/uis arouiatica, and surrounded by tufts of Agave virginica, 

 Solidago Druiniiwndii and Pcl/aia atropurpiirea is bizarre in the 

 extreme. Liqiiidambar styracifliia, which in Illinois is confined 

 to the southern part, shows indications of the. same distribution. 

 It is abundant on the driest uplands and in the swamps, but 

 infrequent in the mesophytic midlands. The small cane, Anin- 

 dinaria tecta, which is abundant in all the bottom-land swamps,- 

 wet woods and along streams, is also occasional in the moister 

 upland woods and even in the thin but moist soil-deposits on 

 ledges of shaded cliffs. It is worthy of note that in 1902 the 

 canes in the latter habitat bloomed, though apparently no 



others did. 



Columbia University. 



GRAYIA OR EREMOSEMIUM 



By p. a. Rydberg 



For sixty years a very interesting and rather handsome Cheno- 



podiaceous shrub had borne the name Grayia^ named in honor of 



the immortal Asa Gray. In December, 1900, Dr. E. L. Greene 



replaced it by Ercmosemhivi - under the plea that the former 



"dates from 1841 only ; while another genus by the same name 



was published a year or two earlier." It would have been well 



if Dr. Greene had stated by whom and where this other Grayia 



• Hook. & Arn. Bot. Beechey Voy. 387. 1840. 

 2 Greene, Pittonia 4 : 225. D 1900. 



