COOK AND COLLINS—-ECONOMIC PLANTS OF PORTO RICO. 25 
Tournefortia gnaphalodes. NIGUA DE PLAYA. 
A shrub 1 meter high, found on coastal plains. (Stahl, 6: 109.) 
Tournefortia hirsutissima. NiIGuA PELUDA. 
A reclining shrub, 1 to 3 meters. In hedges and waste places. At Juana Mata, 
near Ponce, this species was called simply ‘‘ nigua,’’ while Bello writes *‘ mata de 
niguas.”’ 
Tournefortia laevigata. NiGuira. 
A shrub 2 meters high, found on steep cliffs. (Stahl, 6: 103.) 
Tournefortia laurifolia. NiGuA-HOJA-LAUREL. 
A woody biennial 2 meters high, found in waste places and at the base of moun- 
tains. Known from Coamo. (Stahl, 6: 105.) 
Tournefortia volubilis. NiGUA ENREDADERA. 
A woody twiner 3 meters high, grows in waste places, running over trees and 
shrubs. Known from Salinas de Cabo Rojo. (Stahl, 6: 104.) 
Tovomita elliptica. MARIALVA ELIPTICA. 
Family Clusiaceae; a much-branched shrub 2 meters high, found on the nerth 
coast from Loiza to Manati. (Stahl, 2: 126.) 
Tradeseantia discolor. See Rhoeo discolor. 
Tragia volubilis. PRINGAMOSA. 
A euphorbiaceous vine collected at Guayama (no. 539) and at Vega Baja (no. 
1024). The leaves and stems are beset with poisonous hairs, which cause a burn- 
ing sensation and raise blisters. 
Tree fern. : 
Three genera of tree ferns were reported by Eggers—Cyathea, Serra, and Also- 
phila—but without reference to species. 
Tree tomato. See Cyphomandra betacea, 
Trema lamarkiana. 
A tree or shrub known from Sabana Grande. The Index Kewensis places this 
genus under the Urticaceae, while Engler assigns it to the Ulmaceae. 
Trescabezas. See Ceplaelis triplocephala. 
Tribulus cistoides. ABROJO. 
Family Zygophyllaceae; found near Guanica by Bello. <A perennial herb com- 
mon to seashores of all continents. Said to be cultivated for its flowers in Jamaica. 
(Stahl, 2: 173.) 
Tribulus maximus. ABROJO. 
A fieshy herb, 50 centimeters high, found in sandy places near the sea, said to 
be gathered in Jamaica for fodder. (Stahl, 2: 172.) 
Trichilia diversifolia. CAaBo DE HACHA, 
Family Meliaceae; a tree of medium size in mountain woods. (Grisebach.) 
(Stahl, 2: 166, as Photacilia diversifolia. ) 
Trichilia havanensis. GUARAGUAO CIMARRON. 
A specimen believed to represent this species was obtained near Toa Alta from 
a bush 8 to 10 feet (2.5 to 3 meters) high. 
Trichilia hirta. Capo DE HACHA. 
A forest shrub, 5 meters high, known from Guayama and Aguada. Specimens 
were collected at Coamo Springs, with the common name ‘‘ guayavacan.’’ (Stahl, 
2: 165.) 5 
Trichilia pallida. 
Known from Adjuntas, Luquillo, and Yabucoa. (Sintenis. ) 
