COOK AND COLLINS—ECONOMIC PLANTS OF PORTO RICO. 267 
Zamia erosa. MArRuUNGUAY. 
What appears to be a previously undescribed cycad was found in the forests 
covering the rough limestone hills to the south of Vega Baja. It is peculiar in 
having but one or two fronds with distant, broad, apically erose-dentate leaflets. 
The large fleshy root is hidden in crevices of the jagged rocks, but is dug out by 
the natives and used in the manufacture of starch. 
Zanthoxylum acuminatum. Espino. 
A shrubby tree reported from Ponce. (Stahl, 2: 177.) 
Zanthoxylum aromaticum. See Fayara caribaed. 
Zanthoxylum caribaeum. See Fagara caribaed. 
(Stahl, 2: 177.) 
Zanthoxylum clava-herculis. See Fugara martinicensis, 
Zanthoxylum microphyllum. See Fagara spinifew. 
Zanthoxylum ochroxylum. See Fagara monophylla, 
Zapote. See Achras sapota, 
A tree from all parts of the island; height, 40 to 45 feet (12 to 14 meters); diam- 
eter, 12 to 15 inches (30 to 37 centimeters); wood red, hard; specific gravity, 1.150; 
used for cabinetmaking. (Exp. 1897.) 
Zaragoza mangrove. See Conocarpus erectis, 
Zarza. See Mimosa ceratonia, 
Zarza de cercas. See Caesalpinia sepiaria. 
Zarzabacoa. 
A name used for numerous species of Meibomia and Lespedeza. 
Zarzabacoa cola de escorpion. See Meibomia scorpiurus. 
Zarzabacoa comun. See Meibomia incana, 
Zarzabacoa de dos hojas. See Zornia diphylla. 
Zarzabacoa de monte. See Veibomia avillaris. 
Zarzabacoa de tres flores. See Meibomia triflora. 
Zarzabacoa dulce. See Meibomia mollis, 
Zarzabacoa enana. See Stylosanthes procumbens, 
Zarzabacoa espiral. See Meibomia spiralis. 
Zarzabacoa galana. See Meibomia adscendens. 
Zarzabacoa peluda. See Meibomia barbata. 
Zarzabacoa torcida. See Meibomia tortuosa, 
Zaya. 
A tree from all parts of the island; height, 45 to 50 feet (13 to 15 meters); diam- 
eter, 9 to 10 inches (22 to 25 centimeters); wood light, soft: specific gravity, 0.733; 
used in building houses. (Exp. 1857.) 
Zeamays. Corn. Mats. 
In Porto Rico and, in fact. throughout the West Indies corn is a mucl. less 
important crop than in other parts of Spanish America, its place being taken to a 
great extent by root crops. The samples which were seen were all poor. 
Captain Hansard states that no selection is practiced, and the varieties thus 
deteriorate, although the crop grows in almost any part of the island, preferably 
on sandy loam. Clay is to be avoided. 
It is marketed by the hundred ears or by the fanega of 600 ears, It is very use- 
ful as a catch crop and to shade young trees, such as coffee. 
Zerrezuela. . 
Enumerated by Hill among forest trees yielding timber and fuel. 
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