(152) 
is now being installed ; the viticetum (d) or collection of vines, 
both woody and herbaceous, is planted at an arbor just east 
of the northern part of the valley. 
(2) SysTEMATIC PLANTATION 
This is located in that portion of the valley south of the 
driveway crossing it, and here the plants are grouped by nat- 
ural families in botanical relationship. To the east of the 
brook are the seedless plants, represented by the ferns and 
their allies, and the families of seed-bearing plants belonging 
to the large endogenous division, or those with parallel-veined 
leaves and with one seed-leaf (monocotyledons). To the west 
of the brook are the families belonging to the exogenous 
division of plants, or those in which the leaves are usually net- 
veined and which have two seed-leaves (dicotyledons). This 
latter group embraces the larger part of the plants in the col- 
lection. Along the brook or in it, will be found many aquatic 
plants, representing in some cases families which are exclu- 
sively water-lovers, while in other cases they are aquatic rep- 
resentatives of families occurring in the immediate vicinity in 
the beds. In this plantation, the family groups are arranged 
substantially in a sequence beginning with those of simpler 
organization and proceeding to the most complex. 
The series commences in the southern corner of the valley 
at the foot-path entrance, where the hardy ferns and their 
allies will be found, including species from all parts of the 
north temperate zone. Among these’ may be mentioned the 
ostrich fern, the cinnamon fern, Clayton’s fern, the royal 
fern and the American royal fern, the brake or bracken, and 
a number of species of the shield-ferns and of the spleen- 
worts. A collection of forms of the lady-fern, representing 
many variations, will be found here also. Some of the 
aquatic representatives of the ferns and their allies will be 
found in the pond nearby. 
In this pond will also be found the following aquatic endog- 
enous families: the cat-tail family, the bur-reed family, the 
pond-weed family, the arrow-grass family, and the tape-grass 
