180 Rhodora [OCTOBER 
of the calyx, equalling or exceeding the styles; anther-cells plump, 
0.75 mm. long, with copious pollen; calyx 2.5 mm. long. This plant 
fruits regularly. 
Petals averaging 4 mm. in length: filaments shorter than, or barely 
equalling the calyx, often hidden within it; anther-cells shrunken, 
0.25 mm. long, without pollen: this plant is dependent upon the 
other for pollination, and may, or may not, develop fruit according to 
circumstances. 
Neither form appears to fruit freely, and a vigorous individual does 
not, as a rule, ripen more than one or two capsules. Both forms show 
a marked tendency to grow in colonies, consisting exclusively of one 
form of plant, but neighboring colonies do not vary greatly in fruitful- 
ness, whether consisting of the large-, or small-flowered variety. Men- 
tion was made in the previous article of an extensive station in dry, 
open woods in Franklin, Connecticut, where the small-flowered form 
seemed to be the only one present and yet fruited well. The writer 
has since been able to locate several small colonies of the plant with 
large flowers in the same woods. It is unusual in Franklin to find the 
latter form in dry soil, as it exhibits a decided preference for meadow 
lands. Both forms fruit about alike in these woods. But there is a 
marked difference at another Franklin station, a wet meadow with a 
border of dry gravel. In the meadow the large-flowered Arenaria is 
abundant and unusually fruitful. On the gravel, however, where the 
small-flowered Arenaria is even more abundant, one needs to search a 
long time to find a fruiting capsule. This may be due to interference 
with insect visitations by the dense growth of grass, which springs up 
on the meadow in early June, and soon overtops and conceals the 
smaller plants at its base. 
In an interesting paper on A. lateriflora in Ruopora for March, 
1914, Mr. Wilhelm Suksdorf suggests that the long-stamened flower 
is not fertile and that the two forms are the two sexes of a dioecious 
species. Very likely the species may prove to be dioecious in some 
localities, but such have not come under the writers observation. 
During the past summer he carefully marked many plants with long- 
stamened flowers and these uniformly produced seeds which appear 
to be normal. A suite of specimens has been deposited in the Gray 
Herbarium. 
New Haven, CONNECTICUT. 
