171 
slightly interrupted; flowers 5—6 mm. broad; calyx 5-parted, the 
2 outer sepals conspicuously larger than the 3 inner; stamens 8, 
included, anthers large; stvle 3-parted, included; achene slightly 
obovoid and unsymmetrical, about 2 mm. long, light-brown, 
smooth and shining. (Plate 194.) 
Found in the Cascade Mountains of Oregon, at Crater Pass, by 
Dr. N ewberry, September 1, 1856, growing in scoria near the 
snow line, 7,000 feet altitude. There is a specimen of Polygonum 
in the Columbia College Herbarium, collected by Mr. Frank 
Tweedy, of the Northern Transcontinental Survey, in July, 1883. 
It is from the Yakima region, Washington, altitude 6,000 feet. 
This specimen can safely be referred to P. Newberryz, and is not 
P. Davisig, under which name it was distributed. The plant from 
the Yakima region is apparently less stunted and nearly smooth, 
but these differences can be accounted for by the lower altitude of 
its habitat. 
va Newberryi is intermediate between P. alpinum and P. 
Davisie, possessing the reduced and short racemes of the latter 
Species and bearing an achene more like that of the former. With 
many minor characters it is strikingly different from all its other 
relatives of the Aconogonon Section. 
The type of this species reached Dr. Torrey in 1857, the year 
after Dr, Newberry collected it in the Cascade Mountains. In 
some way the plant was mounted on a sheet of Rumex venosus, 
Where it remained unstudied up to the present time. : 
PoLtyconum CAMPORUM Meisn. in Mart. FI. Bras. 5: 21 (1855). 
Heretofore this species has not been known to grow very far 
fast of the rooth parallel, but Rev. Mr. Langlois has it from St. 
Bernard county, Louisiana, where it thrives in low, grassy and 
Saltish ground near the Gulf of Mexico. This brings the plant 
Very near the Mississippi River. ; 
PoLyconus RAMOSISSIMUM PROLIFICUM N. var. ce 
Very bushy. Stem erect 6-10 dm. tall, rather stout; inter- 2 
nodes short; nodes proliferous, producing -2 or more branches; 
leaves variable in size and narrower than those of the typical form ; 
°Wers and achenes more numerous than usual. 
Referable to P ramosissinum by its ocree and achene, but = 
differing conspicuously from any form of that species by its pecu- — 
_ liar mode of branching, which. gives it dense appearance, and — 
