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indicated in the tables presented to him. It is not the same for the cultivators of Eucalyptus, whose 

 always incomplete collections only furnish them partly, and at great intervals, with what they need to 

 arrive at a certain determination. In order to supplement, and to aid as much as possible the reader in 

 making at least a first selection, I have thought of giving here a series of synoptical tables, each one 

 founded on a dominant character easy to understand. It will not surprise my readers to see the same 

 species figuring in several of these tables, which would not otherwise include the species we actually possess 

 (in France, .T.H.M.) or at least those which are best known to me. 



A. Classification of species according to the disposition and diverse modifications of the leaves. 

 (Naudin, Mem. ii, 15.) 



1st. Species more or less biform. I class in this section the Eucalvpts which in the first period of 

 their development, which we call their juvenile stage (.'tat juvenile) more or less lasting, have the leaves 

 opposite, more often decussate and sessile, those oE the adult stage being always alternate, lanceolate and 

 petiolate. This section may be subdivided : — 



(a) Biform species with axillary umbels or 3-flowered cymes, e.g., E. globulus, viminalis, umigera. 



(h) Biform species having axillary umbels, with more than three flowers, except in cases of suppression 

 or premature falling (they are frequent in E. jugalis), e.g., E. eoccifera, goniocalyx, myrtifonnis, 

 Huberiana. Mazeliana, jvgalis, gracilipes, Risrfoni. 



2nd. Filiform species, that is to say, those in which the first stage only slightly differs from the 

 adult. Here also we have two groups, according as the leaves are alternate, or remain opposite during the 

 whole life of the tree. 



(a) Uniform, opposite-leaved species. (He is in this respect following Link, 1822, J.H.M.), E cordata, 

 cinerea, doraloxylon. 



(h) Uniform alter >Mte-leaved species, that is to say, those having the leaves always alternate and 

 petiolate, with some exceptions, in which the 4, 6 or 8 first leaves (premieres feuilles) above the 

 cotyledons may be opposite and more or less sessile, but this state soon gives place to the 

 adult form, characterised by the petiolate and alternate leaves. Nevertheless, it often happens 

 that these first leaves differ considerably in shape and size from those of a more advanced 

 age, e.g. — 



E. rcsinifera. E. indliodora. 



E. leucoxylon. E. crebra. 



E. occidentalis. E. diversicolor. 



E. rudis. E. cosmophyUa. 



E. tereticornis. E. cormita. 



E. cilriodora. E. botrijoides. 



E. maculala. E. Lelimanni. 



E. corynocalyx. E. robusta. 

 E. polyanthema. 



A small number of species of this section are distinguished from others in the juvenile stage, in that 

 their first leaves are peltate, by reason of the insertion of the petiole a little above the base of the lamina. 

 One sees this in — 



E. cilriodora. E. macitlata. E. calophylla. 



In this same section we find species whose secondary venation is sufficiently characteristic. 

 Sometimes the veins are longitudinal and are directed towards the apex of the leaf. (Longitudinal 

 venation, see next Part, J.H.M.), E. pcciciflora (coriacea). 



Sometimes they are fine, approaching one another, parallel to one another, and spreading out at a 

 very wide angle from the median vein, to lose themselves in a marginal nerve which almost becomes 

 identical with the margin of the leaf. (Transverse venation, see next Part, J.H.M.). 



E maculala. E. calophylla. 



E. eitriodora. E. botrijoides. 



E. robusta. E. rehmifera. 



