173 
inclined to regard it as a form of that species, but a careful study 
has forced me to dispose of it as recorded above. 
PotyGonum SawaTCHENSE Small, Bull. Torr. Club, 20: 213 (1893). 
While examining some plants in the United States National 
Herbarium a short time since, I was surprised to find several speci- 
mens which I at once recognized as new representatives of my 
Polygonum Sawatchense. They are nearly like the original in 
every respect. 
One specimen is rather strict and was collected in the Yellow- 
stone Park, by Mr: Tweedy, in 1885. The other specimen is from 
Castle Rock, in the foot-hills of the Rocky Mountains near Golden, 
Colorado, altitude about 6,000 feet, gathered on July 1 and Sep- 
tember 9, 1885, by Mr. Patterson, No. 128. The plants of the 
last collection are more elongated and rather straggling. This 
difference is most likely due to their unlike habitats and altitudes. — 
PoLyconum puMEToRUM L. Sp. Pl. Ed. 2, 522 (1762). 
Recently collected in the vicinity of Knoxville, Tennessee, by 
Prof. F. Lamson-Scribner. Its geographical range may be de- 
fined thus: Eastern Missouri, the prairies of Illinois and Eastern 
Tennessee. 
PoLYGoNUM CRISTATUM Engelm. & Gray, Bost. Journ. Nat. Hist. 
5: 259 (1847). 
This I found in the United States National Herbarium under 
the name of Polygonum dumetorum, collected by W. H. Ravenel 
at Aiken, South Carolina, in September, 1869. In my Preliminary 
List of American Species of Polygonum, two localities for this 
“pparently rare plant are cited, and now we have the third. It 
may be that the species has often been overlooked on account of i 
its close resemblance to its nearest relatives P. scandens and P.. i 
dumetorum, and we may expect to find it at intermediate stations — 
between Texas and South Carolina. (Plate 196.) 
The Nomenclature of the Genus Bittneria Duham. 
By T. H. Kearney, Jr. | | | 
Burneria (correctly Birrneria) Duhamel, Traité des Arbres et. 
_ Arbustes, 1: 113. ¢. 45 (Sept., 1755)—Not Byttneria Lif. It. 
eT. 313 (ip. pe 
. 
