From the ArcaMax Publishing, The Culinary World, with Chef James Newsletter:
http://www.arcamax.com/news/chefjames/s-567400-746184
JUJUBE
The Candy: Jujubes are small fruit flavored candy,
with a hard gelatinous texture. In the 19th and early 20th centuries,
they often contained cough medication. They originally contained juice
from the Chinese Date (common jujube, Ziziphus jujuba)
The Plant: Jujube, Indian Jujube or Chinese Date (red date),
are names for 2 species of a small thorny evergreen tree of the genus
Ziziphus and also for its fruit. The common jujube or Chinese
Date (Ziziphus jujuba) has been widely cultivated in China for
over 4,000 years. The small reddish fruit is eaten fresh or stewed,
but is more commonly dried or candied.
The Indian Jujube
(Ziziphus mauritiana) is smaller and not as sweet as the
Chinese Date.
Courtesy of FoodReference.com.