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Algaroba-pods for cattle-fodder, and utilized even in some 
instances for human food. As allied plants, besides the 
following, may be mentioned : P. horrida, Humb., occurring 
from the base of the Andes to the sand-shores of Peru ; 
P. julijlora, Cand., growing from Mexico and West India to 
Ecuador ; P. Siliquastrum, Cand., extending from the 
Chilian Andes apparently into the Argentine Province 
Catamarka. A short communication on the American 
Algaroba-trees was presented to our Parliament by the 
writer in 1871. 
Prosopis glandulosa, Torrey. 
Colorado, Arkansas, Texas. The pods of this th orny ever 
green shrub or tree are also succulent. It exudes a gum, 
not unlike G um Arabic, and this is obtained so copiously, 
that children could earn from 2 dollars to 3 dollars a day in 
Texas while gathering it, latterly about 40,000 lbs. being 
bought by druggists there. The tree attains a height ot 
30 feet, and its wood is excessively hard. The pods of 
several species are rich in tannin. 
Prosopis pubescens, Bentham. 
Texas, California, New Mexico. Likely available for hedges, 
with other species of other countries. 
Prosopis spicifera, L. 
India. A thorny tree, also with edible pods, possibly hardy 
here. 
Prosopis Stephaniana, Kunth. 
Syria and Persia. A shrubby species for hedge-growth. 
Prunus Americana, Marshall. (P. nigra, Alton.) 
Canada, Eastern United States of America. A thorny tree, 
furnishing the Yellow and Eed Plum of North America. 
The fruit is roundish and rather small, but of pleasant taste. 
Prunus Chisasa, Michaux. 
North America, west of the Missisippi. On the prairies it 
is only 3 to 4 feet high. Fruit spherical, red, rather small, 
with a tender usually agreeable pulp. Other species with 
edible fruit occur in North America, such as P. pwmila, L., 
