Coix lacryma-jobi is an annual grass that is commonly
grown for food, medical and ornamental uses. The grains also are
used for beverages (tea and alcoholic). Due to their appearance,
the seeds are used as beads for jewelry, rosaries and other
decorative objects. The species has become invasive, forming dense
clumps that block the flow of waterways in Singapore, Australia,
New Caledonia, the Cook Islands, the Galapagos, Greece Hawaii,
French Polynesia, Mexico, Brazil, Nicaragua, Costa Rica, Puerto
Rico, the Virgin Islands, Jamaica and on many islands in the
Pacific and Indian Ocean. Similar to other grasses, C.
lacryma-jobi is wind pollinated. Self- and cross- pollination
can occur. Natural dispersal occurs via involucres containing the
fruit, which are carried by water.
The genome consists of 10 chromosomes (2n = 20) and has an
estimated size of 1.56 Gb.