406 Platanacetz Platamis. 



1. PLlTANUS. 



Characters of the order. Name from TrXarvs, broad, in 

 allusion to the foliage. 



1. P. orientalis. Common Plane. The forms of this beau- 

 tiful tree are very numerous, differing chiefly in the shape and 

 lobing of the leaves. The variety acerifolia is one of 

 the commonest in cultivation, frequently bearing the erro- 

 neous name of P. occldentalis. It is the form known as the 

 London Plane, on account of its being generally planted in 

 the parks. An erect-growing tree with usually three-lobed 

 leaves, or if 5-lobed less deeply so than in the typical form. 

 The typical orientalis is a more spreading tree with very large 

 deeply 5-lobed leaves, cordate or truncate at the base. The 

 variety cuneata has the leaves distinctly wedge-shaped at 

 the base ; laciniata very deeply much divided leaves ; and 

 variegata variegated foliage. 



2. P. occidentalis. American Plane. This differs from the 

 last in its less deeply lobed more coriaceous pubescent leaves, 

 and in the fertile catkins being usually solitary on the long- 

 peduncles. It is very rare in British gardens, and not so hardy 



the Common Plane. 



ORDER CV.-JUGLANDACE^l. 



Handsome deciduous trees, often with a resinous juice. 

 Leaves alternate, unequally pinnate, exstipulate. Flowers 

 small, dioecious, inconspicuous, often appearing before the 

 leaves ; males in catkins, females solitary or clustered. Calyx 

 irregularly lobed. Petals very small or wanting. Fruit a drupe, 

 inferior, 2- or 4-celled at the base, and 1-celled at the apex, 

 1 -seeded. Seed destitute of albumen, wrinkled and lobed, or 

 divided by the partial dissepiments. There are four genera, 

 including less than thirty species, natives of the temperate or 

 warm parts of the northern hemisphere. 



1. JUGLANS. 



Male flowers in simple catkins, having a calyx of 3 to 6 

 irregular lobes, and usually numerous (more than 8) stamens. 

 The fleshy fibrous epicarp of the fruit bursting irregularly, endo- 

 carp or shell 2-valved, usually with deep furrows. The species 



