Jerusalem

1. An American plant, a perennial species of sunflower (Helianthus tuberosus), whose tubers are sometimes used as food
2. One of the tubers themselves.
Jerusalem cherry (Bot.),
the popular name of either of two species of Solanum (Solanum Pseudo-capsicum and Solanum capsicastrum), cultivated as ornamental house plants. They bear bright red berries of about the size of cherries.
Jerusalem oak (Bot.),
an aromatic goosefoot (Chenopodium Botrys), common about houses and along roadsides.
Jerusalem sage (Bot.),
a perennial herb of the Mint family (Phlomis tuberosa).
Jerusalem thorn (Bot.),
a spiny, leguminous tree (Parkinsonia aculeata), widely dispersed in warm countries, and used for hedges.
The New Jerusalem ,
Heaven; the Celestial City.