94 Trans. Acad. Sci. of St. Louts 
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 
