94 Trans, Acad. Sci. of St. Louis 



special reports on the native forest trees of this region 

 (33, 37). He probably did not assemble any collections. 

 J. Francis Williams made a special study of the timber 

 of the Magnet Cove region (38) and reported a definite 

 relation between the vegetation and the underlying 

 igneous rocks, confirming a feature previously mentioned 

 by Featherstonehaugh, but apparently not observed by 

 Harvey (21). 



In the Annual Report of the Arkansas Geological Sur- 

 vey for 1888 Branner and Coville (35) published the 

 most recent comprehensive catalogue of Arkansas plants, 

 a publication which appeared in 1891. This also in- 

 cluded a discussion of the general botanical features of 

 the state (35). Coville made some collections which are 

 on deposit in the U. S. National Museum, but the bulk of 

 the work done for the plant list seems to have been based 

 on field notes. The Harvey collection at Fayetteville 

 was worked over by Professor Simonds in preparing 

 the Branner and Coville catalogue. 



An extensive collection made by Mr. E. N. Plank, who 

 lived at Decatur, Arkansas, for many years, was acquired 

 by the New York Botanical Garden. The Plank collec- 

 tion contained many Arkansas plants, but he seems not 

 to have published a list of these except in a single brief 

 paper: "Concerning the Plants of Southwestern Ar- 

 kansas" (41). The material collected by Plank and in- 

 cluded in this report has been consulted at the herbarium 

 of the New York Botanical Garden. 



In an ecological study, Dr. S. M. Coulter, (43) re- 

 corded a number of swamp species new to Arkansas. 

 Similarly Dr. Roland M. Harper (47-49) has made 

 records of a number of species characteristic of our 



