Monographs Details: Guettarda scabra (L.) Lam.
Authority: Maguire, Bassett. 1972. The botany of the Guayana Highland--part IX. Mem. New York Bot. Gard. 23: 1-832.
Family:Rubiaceae
Description:Distribution and Ecology - Distribution. West Indies, Central America, Mexico, Florida, and Venezuela. TRINIDAD. Maraval, Baptiste, 1891, Trin. Herb. 5851. TOBAGO. Cestara Road-Mount St. George, 18 Oct 1937, Sandwith 1843; The Widow, near Easterfield, 7 Jul 1910, Broadway 3844. VENEZUELA. Nueva Esparta: El Copey, Margarita, alt 300 m, Aug 1953, Hno. Gines 3831, 3081; Foldats 3008; el Valle, Isla Margarita, alt 250-550 m, Aug 1955, Bernardi 2535; San Juan Mt., alt 600 m, 19 Jul 1903, Johnston 114.

Discussion:

Matthiola scabra L., Sp. Pl. 1192. 1753.

Guettarda ambigua DC., Prodr. 4: 455. 1830.

Guettarda rugosa Sw., Prodr. 59. 1788.

Type. West Indies.

This species is variable in shape and size of leaves, the base varying from cordate to rounded to obtuse, the apex from acute to rounded with an abruptly mucronate apiculate projection 1-4 mm long. In the Venezuelan and Tobagan collections the midrib and lateral nerves beneath are strigose, but in other specimens may be hirsute.

Distribution:West Indies| Central America| Mexico North America| United States of America North America| Venezuela South America| Trinidad and Tobago South America|