250 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 
EUCALYPTUS HYBRIDS IN THE MEDITERRANEAN REGION. 
By Dr. Trasvt, of Algiers. 
In these days we do not hesitate to admit that all the causes which tend 
to variation may contribute to the genesis of new species, and hybridi- 
sation, without doubt, is in many cases the point of departure for new 
forms which, in time, become fixed species, and have a place either in 
nature or under cultivation. 
The genus Eucalyptus furnishes, in the Mediterranean region, a very 
evident demonstration of this principle. 
A hundred Eucalypti have been acclimatised in the North of Africa 
during the last thirty years. The most remarkable collection is that of 
M. Cordier, at his estate of El Alia, at Maison Carrée, near Algiers. 
When one tries to classify the trees which are raised from seed 
gathered in these collections, great difficulties are experienced, and some 
of them one is tempted to describe as new species not yet observed in the 
country of their origin. 
In 1886, having made a sowing of seed gathered from a Hucalyptus 
botryoides in the garden of the City Hospital, I was surprised to find 
about 60 per cent. of young plants very different from the seed-bearer. 
The same observation may be made regarding the sowings made in the 
following years. The inflorescences and the fructifications of all these 
trees, studied with care, have enabled me to establish that the Hucalyptus 
botryoides from which I gathered my seed could have descendants of two 
sorts :— 
(a) Eucalyptus botryoides. True. 
(b) Eucalyptus. Very different. Evidently hybrids. 
The only Kucalypti existing in the immediate vicinity of the seed- 
bearing botryoides were H. rostrata. 
The new form corresponded well to the combination botryoides x 
rostrata. It has also a very great resemblance to the H. resinifera (Sm.), 
a rather polymorphic type. 
For eight years I have multiplied this Hucalyptus, and I observe that 
the plants resulting from the first hybrids have well maintained their 
principal characters, while presenting, like many of their congeners, very 
numerous individual variations. 1t is on account of this fixity that I have 
described this Eucalyptus as a new specific type, although it is certainly 
the outcome of a chance hybridisation. These are its characters :— 
Eucalyptus Rameliana=E. botryoides x rostrata (Trabut). 
Tree of very rapid growth, branching at a very early stage, and 
assuming a regularly pyramidal habit; foliage dense, of a sombre green ; 
leaves leathery, oval lanceolate, slightly arched, very pointed, delicately 
veined, length 15 to 22 centimetres, width 30 to 45 millimetres. The 
two surfaces are distinct, the upper one, more glossy, having about 70 
stomata per square millimetre; the under surface,.which is paler, has 
