72 



FRENCH (particularly Algerian) HYBRIDS. 



Let us now proceed to consideration of forms which have been looked upon as 

 hybrids. The names have been arranged, for convenience, in alphabetical order, and 

 the descriptions and remarks have been translated by me from Dr. L. Trabut's paper 

 "Bulletin de la Station des Recherches Forestieres du Nord de l'Afrique (Alger)," tome i, 

 p. 140 (1917), except in the case of E.jugalis Naudin. 



E. algeriensis Trabut. 



E. amplifolia Naudin. 



E. antipolitensis Trabut. 



E. Bourlieri Trabut. 



E. Cordieri Trabut. 



E. gomphocomuta Trabut. 



E. jugalis Naudin. 



E. occidentalis Endl. var. oraneniis. 



E. pseudo-globulus (Hort.) Naudin. « 



E. Trabuti Vilmorin. 



E. Stuartiana x globulus Trabut. 7: ' 



DESCRIPTION. 



CCXCIL x E. algeriensis Trabut. 



Reputed parents, E. rudis Endl., and E. rostrata Schlecht. 



Another hybrid form seems to me worthy of attention. It is intermediate between E. rudis Endl , 

 and E. rostrata Schlecht. 



After a certain leaning towards E. globulus, one decides to give the preference to the "Red Gum" 

 Eucalypts. Under this name have been propagated E. rostrata. E. rudis, and E. tereticomis. These three 

 species are found together in the plantations made towards 1880, in which E. rostrata is in greatest 

 quantity. These trees have almost the same appearance. E. rudis has always a trunk covered with 

 scaly bark, while the two others have a smooth bark, because of the exfoliation of the outer bark, as in the 

 case of the Plane. E. tereticomis has an elongated bud, with a long operculum, the filaments of the 

 stamens are not folded back, but straight. E. rostrata has a little bud with a hemispherical operculum, 

 surmounted by a long beak; the stamens have the filaments bent back before expansion. 



These three species are hybridised so well that in their descent it is difficult enough to make an 

 exact determination. One of these forms, well characterised, is to-day very widely spread, and further, 

 it acclimatises itself, for one finds numerous specimens of it growing spontaneously everywhere on the 

 banks of streams. 



In 1904 I described it under the name of E. algeriensis in the Eev. Hort. d'Algerie. 



