1924] Pease,—Eleocharis tuberculosa in New Hampshire 37 
ELEOCHARIS TUBERCULOSA IN NEW HAMPSHIRE. 
ARTHUR STANLEY PEASE. 
On 28 July, 1923, I chanced to be detained for a few hours in the 
‘ain at Mt. Whittier (West Ossipee), N. H., and recollecting that 
a fisherman had told me that White Lake in Tamworth was lined by 
a sandy beach I decided to improve the time by hunting it up. The 
pond lies about a mile from West Ossipee village, in the midst of 
wooded sandy plains which are characteristic of much of the country 
immediately to the south of Chocorua and Pequawket Mountains. 
It rained too hard for me to explore much of the strand, but at one 
point, on the southwest side, at the upper edge of a beach of fine 
white sand, I came upon two plants which struck me as novelties 
for the region, one being Xyris caroliniana Walt. and the other an 
Eleocharis unfamiliar to me. This, when I was later able to examine 
it with a lens, proved to be E. tuberculosa (Michx.) R. & S., made 
perfectly distinctive, though still very immature, by the enormous 
tubercles upon the achenes. This species has not been previously 
reported north of Massachusetts, save for its discovery by Messrs. 
Fernald and Long in Shelburne Co., N. S., and it seemed worth 
while to secure better material. Accordingly on 23 August I 
visited White Lake again, finding the Eleocharis in excellent condition 
and the Xyris in fruit, with Cyperus dentatus Torr. and Solidago 
tenwifolia Pursh nearby, on the upper edge of the beach. Among the 
dense yellow masses of Gratiola aurea Muhl. which covered other 
parts of the damp sands was a considerable area of a form with creamy 
white flowers, forma helveola Bartlett, and near it, just above or just 
be ow the water-line, Isoetes Tuckermani A. Br. and Myriophyllum 
tenellum Bigel., while in the shallow water on the sandy bottom 
Elatine minima (Nutt.) Fisch. & Meyer was abundant. 
Encouraged by these outliers of the coastal plain flora at the very 
foot of the White Mountains, I then visited some of the other ponds 
and lakes in the region. On the west side of Lake Ossipee I was re- 
warded by finding, on the sandy beaches, not only Solidago tenuifolia, 
as at White Lake, but also Panicum spretum Schultes, Hemicarpha 
micrantha (Vahl) Pax (which I had previously found in abundance 
near the monument commemorating Lovewell’s fight with the 
Indians, at the north end of Lovewell Pond in Fryeburg, Maine), 
and Eleocharis diandra C. Wright, known from the sands of the lower 
