COOK AND COLLINS—ECONOMIC PLANTS OF PORTO RICO. DOT, 
A wild tree produced in abundance in all parts of the island, 25 to 30 feet (7 
to 9 meters) high, the trunk 6 to 8 inches (15 to 20 centimeters) in diameter. The 
wood is rather light and soft, ash-colored. Has no use.”’ (Grosourdy, 2: 384.) 
Quasimilla de canario. See Phoradendron quadrangulare. 
Quassia amara. 
A small tree of the family Simarubaceae, native in Guayana and Brazil, but 
now generally cultivated in the tropics of both hemispheres. It furnishes the 
bitter quassia wood, and its medicinal extract is valued as a tonic, particularly 
for the digestive system. 
Quebra hacha. See Ardisia purpurascens. 
Quebra hachas. See Thouwinia tomentosa. 
Quebracho. 
This name is applied by Engler and Prantl to Thouinia, a genus noted for its 
hard wood and represented in Porto Rico by several species. The ‘* quebracho”’ 
bark imported for tanning purposes is from the Argentine Republic and the val- 
ley of the La Plata and is obtained from Schinopsis lorentzii, a tree of the family 
Anacardiaceae. ‘‘ Quebracho”’ is a contraction of ‘‘ quebra hacha’’ and has the 
same meaning, *‘ break-axe”’ or ‘‘axe-breaker’’ in allusion to the extreme hard- 
ness. 
Quenepa. See Melicocca bijuga. 
Quiebra hacha. See Eugenia pseudopsidium portoricensis, Thouinia portori- 
censis, T. striata, and T. tomentosa; also Schmidelia occidentalis. 
Quiebra hachas. See Allophylus occidentalis. 
Quina. See Exostemma floribundum and Antirrhoea coriacea. 
A tree from the northeastern part of the island: height, 25 to 30 feet (7 to 9 
meters); diameter, 10 to 12 inches (25 to 30 centimeters). Wood, pinkish yellow, 
rather soft; specific gravity, 0.798; used in cabinet making. Also called ‘ boje.”’ 
(Exp. 1857.) : 
Believed to be the genuine *‘ cinchona’”’ supposedly introduced. Found about 
Manati; specific gravity of wood 0.87. (Captain Hansard. ) 
Quina del pasto. See Leonotis nepetaefolia. 
Quinine. See Cinchona. 
Quisqualis indica. 
Family Combretaceae; cultivated about dwellings near Maunabo. 
Quitaran. See Colubrina ferruginosa. 
Rabajunco. See Casearia stipularis. 
According to Captain Hansard this wood has a specific gravity of 1.07, is very 
pliable, and is used in hut building. Probably another spelling of ‘* rabojunco.”’ 
Rabo de raton. 
A name meaning “‘rat-tail’’ applied to Gonzalea spicata, a rubiaceous shrub, 
and to a species of Chaetochloa. 
Rabojunco. See Casearia stipularis. 
A wild tree 30 feet (9 meters) high with a trunk 12 to 14 inches (30 to 35 centi- 
meters) in diameter. Furnishes a white, flexible wood used in the roofing of rude 
houses. (Grosourdy, 2: 411.) 
Rabo puedo. 
A tree from all parts of the island; height, 25 to 30 feet (7 to 9 meters); diameter, 
9 to 10 inches (22 to 25 centimeters). Wood, white, soft; specific gravity, 0.725; 
used in building houses. (Exp. 1857.) 
Radish. See Raphanus sativus. 
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