144 CONTRIBUTIONS FROM THE NATIONAL HERBARIUM. 
Euphorbia heterophylla. MaARaAVILLA. 
Cultivated at Juana Diaz as an ornamental. The base of the upper leaves are 
light red, as in Poinsettia. : 
Euphorbia portoricensis. 
A very small plant with subreniform pubescent leaves; recently named by — 
Urban on specimens from near Cabo Rojo. 
Euterpe. 
A genus nearly related to that of the royal palm, Roystonea. An unnamed 
species is reported by Eggers as growing gregariously on El Yunque, at an alti- 
tude of 1,500 to 3,000 feet. This is doubtless the species known in the north- 
eastern part of the island as ‘‘palma de la sierra,’’ which is .said to be very 
similar to the royal palm, if not indeed identical with Roystonea oleracea, the — 
so-called *‘ cabbage palm.” 
Exostemma caribaeum. CUERO DE SAPO. 
A rubiaceous shrub. (Stahl, 5: 48.) 
Exostemma floribundum. See Antirrhoea coriacea. 
+r Ose een 
Fagara. 
A genus of Rutaceae, including many species of West Indian trees formerly 
referred to Zanthoxylum; several of these are indigenous in Porto Rico. 
Fagara caribaea. ESPINo RUBIAL. 
An indigenous shrub or tree, 7 to 20 meters high. Reported from the western 
part of the island, at Penuelas, Sabana, Guanica, Cabo Rojo, Rincon, and Agua- 
dilla. (Urban, Add. 3: 251.) 
Fagara flava. SaTinwoop. 
Indigenous; 3 to 10 meters; known also from the Florida Keys and from several | 
of the smaller Antilles. (Urban, Add. 3: 258.) 
Fagara martinicensis. 
Also called ‘‘ espino,’’ *‘ espino rubial,’”’ and ** cenizo.”’ An indigenous tree of 
5 to 20 meters. Of general distribution from Cuba to Trinidad, and known from 
mountain forests in numerous localities in Porto Rico. The root is considered 
medicinal. (Urban, Add. 3: 252.) 
Furnishes a wood moderately hard, white in color, that breaks with a vertical 
fracture and’is used in the construction of houses in the country. The bark con- 
tains a yellow dye. (Grosourdy, 2: 375). 
Fagara microphylla. See Zanthoxylum tragodes. 
Fagara monophylla. 
Variously named ** carubio,’’ ** mapurito,” ‘‘rubia,’’? and *‘espino rubial.’”?” A 
tree of 2 to 10 meters, indigenous in forests and thickets in coast or foothill — 
regions throughout the island. (Urban, Add. 3: 256). | 
Fagara pterota. ESPINO RUBIAL. . 
A wild tree, produced in abundance over nearly the entire island, 40 to 50 feet 
(12 to 15 meters) high and 12 inches (30 centimeters) in diameter. The wood is 
rather strong and solid, greenish-yellow or snuft-colored; used for doors, floors, 
windows, etc. The military authorities of San Juan used it for making chests. 
It is also used in ships’ bulwarks. (Grosourdy, 2: 382.) 




Fagara spinifex. NIARAGATO. 4 
A shrub or small tree of 1 to 5 meters. Reported from San Ildefonso, near 
Coamo; also from Guanica and the river Juey. (Urban, Add. 3: 265). 3 
Fagara trifoliata. 4 
A shrub or small tree, 2 to 8 meters, known from the vicinity of Guanica. The 
distribution of the species extends southward to Trinidad. (Urban, Add. 3: 272.) 

