EUCALYPTUS TREES. 591 
emanate largely from the garden itself. For the full 
utilization of such collections we need, moreover, to 
maintain a laboratory and ateliers of other kinds, to 
turn the riches of a really botanic institution to ap- 
plied account. Besides, we require to fix all observa- 
tions by lasting records, and render them, by issued 
volumes or by illustrations of pictorial or plastic art, 
‘accessible at all times. No sooner does a seed-grain 
germinate than it can be utilized for research. The 
great De Candolle gave us, in his Memoires des Legum- 
ineuses, the results of his observations on the embry- 
onic development of one large tribe of plants. The 
writer commenced to trace the germination and early 
development of Eucalypts and some other plants, to 
gain in intricate cases of affinity additional data for 
diagnosis, and these kinds of researches admit of the 
widest extension in manifold directions. Be it re- 
membered, for recognizing the multiplicity of mate- 
rial, that our choice for culture in this clime is from 
30,000 out-door species alone, even if varieties are left 
altogether out of consideration ; and how much yari- 
eties represent in number may be recognized in the 
contemplation of the culture forms of a single species 
of Rose, Verbena, or Dahlia. You may perhaps reck- 
on on 38,000 species of trees hardy in Victoria, 7,000 
shrubs, 12,000 perennials, and 8,000 annual herbs— 
grasses and rushes to be counted with the two latter. 
After such an immensity of hardy material has been 
selected from for cultural research, we have not yet 
allowed for the endless number of plants, which we 
can shelter under glass protection, the extent of hos- 
pitality thus to be afforded to delicate strangers being 
simply depending on the monetary endowments which 
