• WordNet 3.6
    • n Tribulus annual or perennial herbs or subshrubs of warm regions
    • ***
Century Dictionary and Cyclopedia
    • n tribulus A genus of polypetalous plants, of the order Zygophylleæ It is characterized by abruptly pinnate leaves, a fruit of from five to twelve indehiscent carpels, and an embryo without albumen. About 35 species have been described, of which 15 are now considered distinct, natives of warm regions almost throughout the world. They are herbs with loose prostrate branches, commonly silky, and bearing opposite stipulate leaves, one of each pair smaller than the other, or sometimes absent. The yellow or white flowers are solitary in the axils of the stipules. The five-angled flattened fruit bears one or more spines or tubercles on each carpel. The species are known in general as caltrop, especially, in the West Indies, T. maximus, a single-beaked American species common also from Texas and California to Panama. Two other species occur in Lower California, T. grandiflorus and T. Californicus, the former extending to New Mexico, and bearing yellow flowers about 2 inches broad. The European species, T. terrestris, is known as land-caltrop. T. cistoides (see cut under stigma), a prostrate perennial species with large yellow flowers, widely distributed along tropical shores of India, Africa, and America, is known as turkey-blossom in Jamaica, where it is common in salt-pastures; it also occurs in Florida, on Key West.
    • ***


In literature:

Here I found Solanum, Tribulus, a Mimosa, lime trees, Carissa, Mimusops, Stemodia ruderalis now appear.
"Journals of Travels in Assam, Burma, Bhootan, Afghanistan and TheNeighbouring Countries" by William Griffith
Tribulus alatus, Delile 4.
"Southern Arabia" by Theodore Bent
Tribulus cistoides L. Bean-caper family.
"Texas Honey Plants" by C. E. Sanborn