320 FOREST CULTURE AND 
species the Tampico Jalap, or rather the Cerro Gordo 
Jalap, is derived. I. operculata, Mart., yields the 
Brazilian Jalap. 
Isatis indigotica, Fortune.—North China. Peren- 
nial, almost shrubby. The use is similar to that of 
the following plant: 
Isatis tinetoria, L.—Dyer’s Wood. From the Med- 
iterranean regions through part of the Orient, appa- 
rently extending as far as Japan. A tall herb of two 
years’ duration. The blue dye is obtained from the 
fermented leaves. Many other species of Isatis, most- 
ly Asiatic, may produce perhaps dye with equal ad- 
vantage. Boissier enumerates merely as Oriental 28 
kinds. 
Jasminum grandiflorum, L.—From India to Japan. 
Flowers white. Extensively cultivated in South Eu- 
rope. The delicate scent is withdrawn either by fix- 
ed oils cr alcoholic distillation. The pecuniary yield 
obtainable from jasmin cultivation seems vastly over- 
rated, even if inexpensive labor should be obtainable. 
Jasminum odoratissimum, L.—Madeira. Shrubby 
like the rest. Flowers yellow. Used like the fore- 
going and following for scent. This may be prepar- 
ed by spreading upon wool or cotton, slightly saturat- 
ed with olive-oil or other fixed oil, the flowers, and 
covering them with other layers so prepared. The 
flowers are renewed from time to time, until the oil 
is thoroughly pervaded by the scent, when the latter 
is withdrawn by alcohol. Other modes of extracting 
the oil exist. 
Jasminum officinale, L.—From the Caucasus to 
China. Flowers white. This is the principal species 
cultivated in South Europe for its scent. 
