28 Rhodora [FEBRUARY 
typical monoica are glabrous, excepting on the margins, yet in more 
robust plants pods are found which show pubescence all over, as in 
Pitcheri. In the pubescence of stem and leaves, monoica is very vari- 
able, being sometimes nearly glabrous, sometimes covered with rather 
copious, coarse spreading hairs, almost as in Pitchert. In the thick- 
ness of the leaves, also, there can be noticed a tendency in large plants 
of monoica toward the rougher and thicker leaves of Pitchert. In 
regard to the subterranean fruiting of the species, I have observed 
that in: smaller plants of monoica there is usually an abundance of 
small one-seeded fruit, seldom over eight millimeters in diameter, while 
in the forms tending toward /itchert they are fewer in number but 
larger, attaining a diameter of twelve millimeters. 
These notes are offered as a possible explanation of the occurrence 
of Amphicarpaea Pitcheri in New England. 
FAIRY-RINGS FORMED BY LYCOPODIUM INUNDATUM. 
B. L. ROBINSON. 
Wuite visiting, on the 20th of July, 1898, the sandy shores of 
Gilmore Pond near Jaffrey, N. H., I was attracted by some exception- 
ally fine specimens of the dwarf club-moss, Zycopodium inundatum. 
This species is reputed rather rare in America, but it has already been 
noted at a considerable number of stations, and where it occurs at all 
it is apt to be abundant. Therefore, the terms zz/reguent, or some- 
what local, are probably the strongest which should be employed to 
express its rarity. 
The striking feature of the specimens observed was that they grew 
in more or less definite rings, not unlike the so-called “ fairy-rings,” 
formed by various species of fungi. More than fifty of these rings 
were observed, together with various regular and irregular patches and 
segments of curves. The rings varied from 7 dm. to 4 m. in diameter, 
the circumference being formed by a more or less regular band of 
prostrate vegetative shoots, which at the numerous forkings threw up 
abundant fertile stems. 
'This mode of growth in rings seemed so interesting that I made, 
during this and several subsequent visits to the pond, such observations 
and records as limited time permitted. In transferring to paper, on a 
