GROUPING OF SPECIES. ro) 
agreeing in one characteristic, differ considerably among themselves 
in other respects, especially in the shape of the leaves. None of these 
species have permanently opposite or stemless leaves. 
Leaves of seedlings hairy: Hucalyptus calophylla, E. citriodora, £. 
coriacea, FE. eugenioides, E. macrorhyncha, and EF. paniculata. 
Leaves permanently horizontal, darker above than below: /ucalyp- 
tus botryoides, KE. calophylla, L. corymbosa, E. diversicolor, FE. resini- 
Fera, E. robusta, and L. salogna. The foregoing species being all indig- 
enous Hp the moister regions of Australia, the characteristic placing 
of the leaves vertically is not necessary. A few species, including 
E.. corynocalyx, EK. diwersicolor, EF. pilularis, and EF. punctata, while 
not having their leaves so distinctly permanently horizontal, have 
leaves with the two surfaces more or unless unlike. 
FLOWERS AND SEED CASES. 
Flowers commonly in threes: Hucalyptus leucoxylon, LH. longifolia, 
Lf. viminalrs. : 
Flower clusters borne on a distinctly flattened stalk: Hucalyptus 
botryoides, EL. gomphocephala, L. goniocalyx, FE. occidentalis, F. punc- 
tata, EL. resinifera, and Lf. saligna. 
Flower-bud covering long and prominent: Hucalyptus cornuta, F. 
marginata, E. occidentalis, 1. siderophlova, and F. tereticornis. 
Seed cases large (one-half inch to 1% inches in diameter): Hucalyptus 
calophylla, I. corymbosa, F. globulus, L. gomphocephala, LE. longifolia, 
E. marginata, and F. robusta. 
Seed cases very small (one-tenth to one-sixth inch in diameter): 
Eucalyptus crebra, 1. microtheca, E. polyanthema, and £. populifolia. 
CLIMATIC ADAPTATION. 
In the following paragraphs an attempt is made to list species espe- 
cially adapted to various climatic situations. It is not claimed that all 
that may be grown successfully in any one region are listed, but it is 
thought that the more promising ones are included. 
Adapted to hot, humid regions: Hucalyptus botryoides, 1. calophylla, 
E. citriodora, FE. cornuta, EF. marginata, and FE. resinifera. Of the 
above, /. botryoides, FE. citriodora, and EF. resinifera are the most 
likely to thrive in America and to produce useful timber. 
Adapted to warm, moderately humid regions having light winter 
frosts: Hucalyptus amygdalina, EF. botryoides, FE. cornuta, FE. corym- 
bosa, F. corynocalyx, F. crebra, EF. diversicolor, EF. globulus, F-. gompho- 
Vee, Lt. goniocalyx, LF. hee JB, hie, Ly. rostrata, HE. rudis, 
EL. sideroxylon, FE. tereticornis, and F. ne Of the fe one Lt. 
botryoides, FE. diversicolor, F. globulus, E-. gomphocephala, and EF. tereti- 
cornis seem best adapted to American climatic conditions, and most 
suitable for producing timber valuable for commercial purposes. 
