Naturalisation in Extra- Tropical Countries. 131 



about 100,000 worth of hazel-nuts are annually imported into 

 Britain. Hazel-oil is superior to almost any other for the table. 

 An illustrated volume has (1887) been devoted by F. Goeschke to 

 the " Hazel-nuts " in its various kinds. 



Corylus Colurna, Linne.* (C. Byzantina, 1'Ecluse). 



From Hungary to Greece and the Himalayas, there at from 5,500 

 to 10,000 feet elevation. The Constantinople-Nuttree, the tallest 

 of hazels, attaining 60 feet in height, of rather quick growth. Nuts 

 much pressed for oil [Dr. K. Mueller] . Hardy at Christiania in 

 Norway [Schuebeler]. This, as well as the Nepal-Hazel (Corylus 

 ferox Wallich) and the Japan-Hazel (C. heterophylla, Fischer) 

 might be naturalised in forest-gullies for their filberts. 



Corylus maxima, Miller.* (C. rubra, Borkhausen; C. tubulosa, Willdenow; 

 C. Lambertii, Loddiges). 



Recorded as indigenous to Hungary and Istria by A. de Candolle, 

 who however places the species nearer to C. Americana. Prof. 

 C. Koch thinks, that it may have sprung from C. Avellana. It 

 yields the red filbert or Lambert-nut. 



Corylus Pontica, C. Koch.* 



Caucasus. Taller than C. maxima. Fruit similar to the Barce- 

 lona-nut ; much consumed in Constantinople [C. Koch]; called also 

 Pontinian nut. 



Corylus rostrata, Alton. 



North- America, both east and west. Never tall. Nut small, but 

 kernel sweet. C. Mandschurica (Maximo wicz), from the Amur- 

 region, is a closely allied species or perhaps only a variety. 



Corynocarpus laevigrata, Forster. 



The Karaka of New Zealand, also the principal forest-tree of the 

 Chatham-Islands, attaining a height of 60 feet. The wood is light, 

 and used by the natives for canoes. The pulp of the fruit is edible. 

 Cattle browse on the foliage. In rich irrigated soil the tree can be 

 adopted for very shady avenues. 



Corynosicyos edulis, (Cladosicyos edulis, J. Hooker.) 



Guinea. An annual cucumber-like plant, with edible fruits about 

 1 foot long and 3 inches in diameter. Referred recently by Cog- 

 niaux to the genus Cucumeropsis. 



Crambe oordlfolia, Steven. 



From Persia and the Caucasus to Thibet and the Himalayas, up 

 to 14,000 feet. The root and foliage of this Kale afford an esculent. 

 Flower-stems reaching 10 feet in height ; the long-stalked leaves 

 may measure more than 2 feet in width. The root bears severe 

 frost [Gorlie]. C. Kotschyana (Boissier) is an allied plant. 



i2 



