168 
New and interesting Species of Polygonum. 
[PLATES 193-196.] 
By Joun K. SMALL. 
The following notes are mainly the results of a study of the | 
specimens representing the American species of the genus Poly- 4 
gonum, preserved in the Herbarium of the Missouri Botanic Gar- 
den, which Dr. Trelease has kindly given me the opportunity as 
examine, and also a large collection from the Gulf region of 
Southern Louisiana, which Rev. A. B. Langlois has put at my 
disposal. 
Potyconum OpeLousanum Riddell; Small, Bull. Torr. Club, 19: — 
354 (1892). se 
Rev. A. B. Langlois has found this form at Pointe a la Hache, 
Louisiana. The locality is some distance south of Opelousas, Mr. ee 
Carpenter’s original station. At Pointe a la Hache it grows im 
ditches and rice fields, and is probably a quite common species 
about the Western Gulf region. ; . 
By the aid of various herbaria the following range is shown: 
Opelousas, Louisiana, and Pointe 4 la Hache to the False Washita, 
Indian Territory (Palmer), and Orizaba, Mexico (Muller). 
PoLyGonum minus Huds. Fl. Angl. 148 (1762). ; 
Heretofore known to occur on the Western Continent only sa 
Chili. In the George Engelmann Herbarium of the Missoutt 
Botanic Garden, I find a specimen of this species with the accom” 
panying label reading thus: “Introduced, gardens and yards, 
Feliciana, Louisiana, Wm. Carpenter, No. 9.” : 
Mr. Carpenter was unable to identify the plant, judging fons 3 
note left on the label. It is clearly this species and the first and 
only specimen thus far known to occur in North America. 
PoOLYGONUM PUNCTATUM ECILIATUM Small, Bull. Torr. Club, 20: 214 
(1893). 
I find in the National Herbarium a specimen of the Persicari@ 
section, whose label bears simply Polygonum, and the record ee 
locality, date, etc. It is clearly my lately described P. punctamn 
eciliatum. The plant has the characters of the type, espe 
