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See also: tree, native of the See also: southern See also: United States and extending southwards through Mexico and the Andean region to' Chile and the See also: Argentine Republic
.
It is known botanically as Prosopis juliflora, and belongs to the natural See also: order See also: Leguminosae (suborder Mimoseae)
.
It reaches 40 or 50 ft. in height with a trunk usually not more than 6 to 12 in. in diameter, and divided a See also: short distance above the ground into numerous irregular' crooked branches forming a loose straggling See also: head
.
The remarkable development of its See also: main See also: root in relation to See also: water-supply renders it most valuable as a drys-country plant; the root descends to a See also: great See also: depth in See also: search of water, and does not branch or decrease much in diameter till this is reached
.
It can thus flourish where'. no other woody plant can exist, and its presence and conditoli afford almost certain indications of the depth of the water-level
.
When the plant attains the See also: size of a tree, water, will be found within 40 or 50 ft. of the See also: surface; when it grows as a See also: bush, between 5o or 6o ft.; while, when the roots have to descend below 6o ft., the stems are only 2 or 3 ft. high
.
These woody roots supply valuable fuel in regions where no See also: wood of fuel value is produced above ground." The leaves are compound, the main See also: axis bearing two or sometimes four secondary axes on which are See also: borne a number of pairs of narrow bluntish leaflets
.
The minute greenish-See also: white fragrant
See also: flowers are densely crowdedon slender cylindrical spikes from ri to 4 in. long; the long narrow pods are constricted between the seeds, of which they contain from ten to See also: thirty surrounded by a thick spongy layer of sweet pulp
.
The wood is heavy, hard and close-grained, but not very strong; it is almost indestructible in contact with See also: soil, and is largely used for fence-posts and railway ties
.
The ripe pods supply the Mexicans and See also: Indians with a nutritious See also: food; and a gum resembling gum arabic exudes from the See also: stem
.
An allied See also: species Prosopis pubescens, a small tree or tall See also: shrub, native . of the and regions of the See also: south-western United States, is known as the screw-bean or screw-pod See also: mesquite from the fact that the pods are See also: twisted into a dense screw-like See also: spiral; they are used for See also: fodder and are sweet and nutritious, but smaller and less valuable than those of the mesquite
.
For a See also: fuller account of these trees see See also: Charles Sprague
See also: Sargent, See also: Silva of See also: North See also: America, iii. p
.
99 (1892) . |
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