a 
which keeps constant the necessary acid conditions required for bog 
plants. Such bogs are abundant in the New Jersey pine barrens 
and are occasional in the mountainous wooded country to the north- 
ward. Our restricted space has made it necessary to combine 
plants of both regions. On the cool banks adjoining the bog are 
plants of northern mountain slopes (such as the Catskills) : bunch- 
berry (Cornus canadensis), twin-flower (Linnaea), creeping snow- 
berry (Chiogenes), hobblebush (Viburnum alnifolium). On the 
opposite side of the broad grass pathway a sand-rimmed pond, 
similar to those found in the glacial moraine of Long Island, is 
edged with thickets of bayberry (Mvyrica carolinensis), chinquapin 
oak (Quercus prinoides), and beach plum (Prunus maritima). In 
the water itself the golden club (Orontiuim), pickerel-weed (Pon- 
tederia), dwarf pond-lily (Nymphaea odorata var. minor), arrow- 
head (Sagittaria), and other species characteristic of the coastal 
plain are found. North of the pond is a replica of the New Jersey 
or Long Island pine barrens, a sandy area covered with pitch pine 
and clumps of Hudsonia, Arenaria squarrosa, and Corema. Op- 
posite the sand barren the brook flows into a wet meadow which is 
filled with marsh marigold (Caltha palustris) and globeflower 
(Trollius laxus), followed in the fall by native asters and golden- 
rods. The brook, following the inside margin of the west border 
mound, is lined by ferns, skunk cabbage, and Mertensia. It has its 
source in a £hododendron thicket in the wooded northwestern part 
of the area. 
This woodland, occupying approximately an acre, 1s carpeted in 
spring with familiar plants—bloodroot (Sanguinaria), dog’s-tooth 
violet (Erythronium), Canada mayflower (Maianthemum), tril- 
liums, May apple (Podophyllum), and various species of violets. 
It may be stated that, with the exception of some native orchids, 
woodland species of Lycopodium, some species of Polygala, and a 
few others, a large majority of the interesting native plants of the 
environs of New York City are being successfully grown here. 
East of the Local Flora section is the 
—, 
Litac CoLcLEecrion 
This collection was at first confined to the * Lilac Triangle,” but 
has since been extended northward and to the west. The collec- 
