Guaiacum angustifolium

In the 19th century trees growing along the outskirts of this region were so small they were described by the United States Department of Interior as "low shrub(s)".

[6] In Mexico, the plant is found in the states of Chihuahua, San Luis Potosí, Coahuila, Nuevo León, and Tamaulipas.

[9] Like other species in its genus, the wood of G. angustifolium has extreme hardness and density and will sink in water.

[15] Texas lignum-vitae is cultivated as an ornamental because of its drought tolerance, dense foliage, compact size, gnarled branches, and fragrant flowers.

[17] Like other members of its genus, the international trade of Texas lignum-vitae is restricted by CITES Appendix II.

Only seeds, pollen, and finished products ready for retail sale may be legally exported.