EUCALYPTUS TREES. 381 
Reseda Luteola, L.—The Weld. Middle and South 
Europe, Middle Asia, North Africa. An herb of one 
or two years’ duration. A yellow dye (Luteolin) per- 
vades the whole plant. 
Reseda odorata, L.—The true Mignonette. North 
Africa and Syria. An herb of one or very few years’ 
duration. The delicate scent can best be concentrated 
and removed by enfleurage. 
Rhamunus catharticus, L.—The Buckthorn. Mid- 
dle and South Europe, North Africa, Middle Asia. 
It can be utilized as a hedge-plant. The berries are 
of medicinal value, as indicated by the specific name. 
The foliage and bark can be employed for the prep- 
aration of a green dye. 
Rhamnus chlorophorus, Lindl.—China. From the 
bark a superior green pigment is prepared.  R. uti- 
lis, from the same country, serves for the like purpose. 
This kind of dye is particularly used for silk, and 
known as Lokao. 
Rhamuus infectorius, L. — On the Mediterranean 
Sea, and in the countries near to it. The berry-like 
fruits of this shrub are known in commerce as Graines 
d’ Avignon and Graines de Perse, and produce a val- 
uable green dye. Other species seem to supply a sim- 
ilar dye - material — for instance, R. saxatilis, L., R. 
amygdalinus, Desf., R. oleoides, L. 
Rhapis flabelliformis, L. fil. — China and Japan. 
This exceedingly slender palm attains a height of 
only a few feet. The stems can be used for various 
small implements. It is one of the best plants for 
table decoration. 
Rhaponticum acaule, Cand.—On the Mediterranean 
Sea. <A perennial herb. The root is edible. 
