250 FOREST CULTURE AND 
of economic horticulture, or in technologie or other 
educational collections. In grouping, at the close of 
this tract, the genera of the plants enumerated, ac- 
cording to the product which they yield, facility is af- 
forded for tracing out any particular series of plants 
about which special economic information may be 
sought, or which may prominently engage at any 
time the attention of the cultivator, the manufac- 
turer, or the artisan. 
Acacia Farnesiana, Willd. — Dioscorides’s small 
Acacia. Indigenous to South Asia; found westward 
as far as Japan ; a native also of the warmer parts of 
Australia, as far south as the Darling River; found 
spontaneously in tropical and sub-tropical America, 
but apparently not in tropical Africa. Professor Fraas 
has recognized in this acacia the ancient plant. The 
scented flowers are much sought after for perfumery. 
This bush may also be utilized as a hedge plant, and 
a kind of Gum Arabic may be obtained from it. 
Achillea Millefolium, L.—Yarrow or Millfoil. Eu- 
rope, Northern Asia, and North America. A peren- 
nial medicinal herb of considerable astringency, per- 
vaded with essential oil, containing also a bitter prin- 
ciple (Achillein) and a peculiar acid, which takes its 
name from the generic appellation of the plant. 
Aconitum Napellus, L.—The Monk’s Hood. In 
the colder, especially mountainous parts of Europe and 
Northern Asia. A powerful medicinal plant of peren- 
nial growth, but sometimes only of biennial duration, 
variable in its forms. It was first introduced into 
Australia, together with a number of other aconits, 
by the writer of thiscommunication. All the species 
possess more or less modified medicinal qualities, as 
