189 
dering the Bronx River within the garden. The Douglas spruce 
(Pseudotsuga) is represented by a group of fine young trees ob- 
posite the elevated railway entrance. These bear long cones 
with bracts projecting beyond the scales, but they are not fruiting 
this season. 
To the west and south of the great glass house are the arbor- 
vitaes (Thuja) and the Asiatic retinisporas in great variety, and 
succeeding them many species of junipers (Juniperus). The red 
cedar (J. virginiana) is plentifully wild in many parts of the 
grounds. The white cedar, so abundant in swamps from New 
Jersey southward, is planted for protection from cold in a swale 
near the Southern Boulevard entrance, and the two kinds of 
bald cypress, native only as far north as New Jersey, occupy 
another swale across the driveways. Both these depressions are 
on the site of an old marsh, reclaimed by grading operations 
several years ago. The swing of the visitors around this conifer- 
ous circle ends on the ridge at the south end of the herbaceous 
garden, where they admired a group of the curious maidenhair 
tree (Ginkgo), native of eastern Asia, its common name is given 
with reference to its peculiar leaves, which are somewhat like 
the leaflets of some tropical maidenhair ferns (Adiantum). Gink- 
go produces a pulpy fruit somewhat like that of the yews, but 
much larger, and is an interesting relative of the conifers, now 
naturally restricted to eastern Asia, but in former geological 
epochs of wide geographical distribution, as shown by its leaves 
found as fossils in Europe and in North America. On the way 
back to the railway station the party stops at houses no. 12 and 
13 of the great glass house to view the collection of Norfolk 
Island pines (Avaucaria), natives of the southern Pacific Islands 
and of South America, but in former geological time extending 
north, at least as far as New Jersey, as shown by fossils in the 
Amboy Clays, studied by Professors Hollick and Jeffrey, and 
spe described by them in a memoir of the New York Botan- 
ical en. Here are also many other beautiful conifers not 
ey) in this latitude, as well as specimen plants of the bizarre 
leafless joint firs (Ephedra), outlying relatives, natives of dry 
and desert countries, and in house no. 1, the cycads, or sago- 
palms, tropical relatives. 
