zed their studies and tests as follows:

The time when coffee could be limited to beans obtained from plants
of _Coffea arabica_ and _Coffea liberica_ has passed. Other
species, with qualities which make them desirable, even in
preference to the well reputed named ones, have been discovered and
cultivated. Among them, the species or group of _Coffea robusta_
has attained a great economic significance, and is grown in
increasing amounts. While it has, as reports seem to indicate, not
as yet been possible to obtain a strain that would be as desirable
in flavor as the old "standard" _Coffea_ _arabica_, well known as
Java or "Fancy Java" coffee, its merits have been established.

The botanical origin is not quite cleared up, and the
classification of the varieties belonging to the _robusta_ group
deserves further study. Anatomical means of differentiating
_robusta_ coffee from other species or groups, may be applied as
distinctly helpful....

As is usual in most of the coffee species, caffein is present. The
amount appears to be, on an average, somewhat larger (even
exceeding 2.0 percent) than in the South American coffee species.
In no instance, however, did the amount exceed the maximum limits
observed in coffee in general....

Due to its rapid growth, early and prolific yield, resistance to
coffee blight, and many other desirable qualities, _Coffea robusta_
has established "its own". In the writers' judgment, _robusta_
coffee deserves consideration and recognition.

Among the _robusta_ varieties, _Coffea canephora_ is a distinct species,
well characterized by growth, leaves, and berries. The branches are
slender and thinner than _robusta_; the leaves are dark green and
narrower; the flowers are often tinged with red; the unripe berries are
purple, the ripe berries bright red and oblong. The produce is like
_robusta_, only the shape of the bean, somewhat narrower and more
oblong, makes it look more attractive. _Coffea canephora_, like _C.
robusta_, seems better fitted to higher altitudes.

Other _canephora_ varieties include:

_Madagascar_, having small, slightly striped, bright red berries and
small round beans;

_Quillouensis_, having dark green foliage and reddish brown young
leaves; and,

_Stenophylla Paris_, with purplish young berries.

These last two named were under test at the Bangel