480 
twice as large. We have the plant from two stations in Green-_ 
land, Fgaliko (Rosenvinge) and Christianshal (A Hartz) July, 1890. 
Since writing the above a sheet from the Meisner Herbarium 
has been seen which bears a specimen of the above collected in 
Iceland by Mr. Ed. Jardin in 1866, and on the label Meisner has 
written a name which, however, like a number of other manu- 
script names, he never published. 
POLYGONUM RAMOSISSIMUM PROLIFICUM Small, Bull. Torr. Club, 21: 
171 (1894). 
I described this variety with some hesitation from specimens 
from a single locality in Nebraska. Since then the same form has 
been found by Prof. A. S. Hitchcock, at Olathe, Kansas, and by 
Mr. E. P. Bicknell, at York Harbor, Maine. These collections, 
although smaller than the type, are otherwise almost identical. 
PoLYGONUM EXSERTUM Small, Bull. Torr. Club, 21 : 172 (1894). 
Collections have recently been made extending the range of 
this lately described species. They are as follows: Numerous 
stations within the influence of brackish water north of New York 
city (Bicknell); Woodbridge, New Jersey (Lighthipe) ; Atchinson, 
Nebraska (Bush); distributed as P. ramosissimum, number 329 
and Saskatchawan (Bourgeau). The latter is an old collection 
made in Paliser’s British North American Exploring Expedition, 
during 1857-8, distributed as P. aviculare var., and placed provis” 
ionally by me under P. ramosissimum in my Preliminary List of 
American Species of Polygonum. 
- Potyconum SawATcHENSE Small, Bull. Torr. Club, 20: 213 (1893)- 
Plants almost identical with the type of P. Sawatchense are st 
served in the Herbarium of Lafayette College. They were col- 
lected in the mountains near Bridger Butte, Wyoming, on jug 
7, 1873, by Prof. T. C. Porter, and represent the fleshy, reduced | 
and scurfy state this species assumes at high altitudes. The more 
elongated and wiry form has also been found in 1892, at Custer, 
in the Black Hills of South Dakota, by Mr. P. A. Rydberg (No. : 
: : 983). 
PoLyconum TENUE Michx. Fl. Bor. Am. 1: 238 (1803). sige 4 
_ Polygonum microspermum Sheld. Bull. Geol. and Nat. 1" 
Surv. No. 9, 70 (1894), not Small. "Se 
