COOK AND COLLINS——ECONOMIC PLANTS OF PORTO RICO. 141 
Espino. See Fagara martinicensis and F. monophylla, Zanthoaylum clava- 
herculis, Z. acuminatum and Z. caribaewm. : 
According to Captain Hansard, this tree has a specific gravity of 7.69. He also 
calls it the *“‘ box thorn.’’ The wood is light yellowish. The trunk has large, 
conical spines, bark turning from gray to white. This suggests the possibility 
that Hwra crepitans, generally called ‘‘avilla,’’ may be intended. 
Espino amarillo. 
A tree from all parts of the island; height, 45 to 50 feet (14 to 15 meters); diam- 
eter, 15 to 20inches. Wood yellow, soft; specific gravity, 0.556; used for lumber. 
_ (Exp. 1857.) 
Grosourdy (2: 382) refers this to the genus Zanthoxylon. 
Espino blanco. 
A tree from all parts of the island; height, 45 to 50 feet (14 to 15 meters) ; diam- 
eter, 15 to 20 inches (37 to 45 centimeters). Wood white, soft; specific gravity, 
0.642; used for lumber. (Exp. 1857.) 
Grosourdy (2: 382) also refers this to the genus Zanthoxylon, and suggests 
that it may be identical with the ‘‘agua blanca’’ of Cuba. 
Espino rubial. See Fagara catibaea, F. martinicensis, F. monophylla, F. 
pterota,and Z. ochroxylwm. 
A tree from all parts of the island; height, 40 to 45 feet (12 to 14 meters); diam- 
eter, 10 to 12 inches (25 to 30 centimeters). Wood yellow, hard; specific gravity, 
0.664; used for lumber. (Exp. 1857.) 
Espino rubio. 
Very scarce and not much used; specific gravity, 0.68, according to Captain 
Hansard. : 
Espinosa. See Anthacanthus spinosus. 
Esponja. See Luffa aegyptiaca. 
Espuela de galan. See Scolosanthus grandiflorus. 
Estramonio. PEODEFRAILE. See Datura stramonium and D. fastuosa. 
Estrapajo. See Luffa aegyptiaca. 
Eugenia aeruginea. GUASAVARA. 
An indigenous myrtaceous tree sometimes 60 feet in height. known from Baya- 
mon, Juncos, Yabucoa, Guanica, Mayaguez, and Arecibo. <A related species of 
equal size, H. eggersii, is reported from several points between Luquillo and 
Penuelas. (Urban, Add. 2: 141.) 
Eugenia aromatica. PALO DE CLAVO. 
A tree 25 feet (7 meters) in height, witha rather straight trunk 4 or 5 feet (120 
to 150 centimeters) in diameter, that furnishes a wood of good weight and harder 
than the average; fibrous and compact with a fine grain. It is not used, and 
when dry has neither odor nor taste. Specific gravity, 0.897. (Grosourdy, 2: 
405.) The native name suggests that of the clove, Caryophyllus aromaticus. 
Kugenia bifloraludibunda. PITANGUEIRA. 
Also called ‘‘hoja menuda.”’ A myrtaceous shrub or small tree, not reaching 
20 feet in height. Indigenous in the thickets of the limestone hills near the coast. 
Reported from the vicinity of San Juan, Juncos, Fajardo, Manati, Morovis, and 
Dorado. The variety lancea comes from Fajardo and Camuy. (Urban, Add. 
2: 149.) 
Eugenia buxifolia. Hoja MENUDA. 
A myrtaceous shrub or small tree, extending from Florida to Cuba, Santo 
Domingo, Jamaica, and Porto Rico; known in Porto Rico from the vicinity of 
Guanica and Cabo Rojo. A similar but somewhat larger species, H. axillaris, is 
