Ormosia is a genus of legumes (familyFabaceae). 131 living species, mostly trees or large shrubs, are native to the tropical Americas, from southwestern Mexico to Bolivia and southern Brazil, to southern, southeastern, and eastern Asia, and to New Guinea and Queensland. Most are tropical, while some extend into temperate regions of China.[1] A few species are threatened by habitat destruction, while the Hainan ormosia (Ormosia howii) is probably extinct already.
The seeds of these plants are poisonous if eaten, but often look pretty, with bright colors and decorative patterns reminiscent of an eye; the common name "horse-eye beans" refers to these seeds. They resemble the seeds of Abrus, snoutbeans (Rhynchosia), and Adenanthera, but are much larger than the former two. In particular those of Ormosia coccinea are often used for jewelry and other decorative purposes, or as good luck charms.[citation needed] The seeds float and are occasionally found as "sea beans".
8 dehiscent seed pod fossils of one Ormosia species from the middle Eocene epoch have been examined from Warman clay pit in Weakley County, while 52 fossil leaflets of two Ormosia species have been described from Warman, New Lawrence and Lamkin clay pits in Weakley and Henry Counties, Tennessee, United States.[4]
^The Fossil History of Leguminosae from the Eocene of Southeastern North America by Patrick S. Herendeen, Advances in Legume Systematics: Part 4, The Fossil Record, Ed. P.S. Herendeen & Dilcher, 1992, The Royal Botanic Gardens, Kew, ISBN0 947643 40 0
