In a few hollows which are reached by moisture the trees of the desert find support, the algarrobo (Prosopis horrida), a low tree of very scraggy growth, the vichaya (Capparis crotonoides), and the zapote del perro (Colicodendrum scabridum), mere shrubs.
Boreale) which should not be confounded with the Brazilian Caesalpinia, palo blanco (Lysiloma candida), the cascalote and divi-divi trees (Caesalpinia Cacalaco and C. coriaria), the "zapote chico " (Achras sapota) from which chicle is extracted, " zapote prieto " (Diospyros ebenaster), wild fig, myrtles, bamboos and many of the types already mentioned in connexion with the sub-tropical zone.
Among them are the banana, plantain, tuna, chili pepper, olive, coco-nut, orange, lemon, lime, mango, pomegranate, " pina " or pineapple (wild and cultivated), fig, ahuacatl (Persea gratissima), chirimoya (Anona chirimolia), papaya, gourd, melon, guava, ciruela (plum), and the several " zapote " fruits, including " Chico zapote " from the Achras sapota, which produces the " chicla " or chicle-gum of commerce, " zapote blanco " from the Casimiroa edulis, " zapotebarracho " (or " amarillo ") from the Lucuma salicifolia, " zapoteprieto " (or " negro ") from the Diospyros obtusifolia, and " zapotemamey."
The natural and forest products of Mexico include the agave and yucca (ixtle) fibres already mentioned; the " ceibon " fibre derived from the silk-cotton tree (Bombax pentandria); rubber and vanilla in addition to the cultivated products; palm oil; castor beans; ginger; chicle, the gum extracted from the " chico-zapote " tree (Achras sapota); logwood and other dye-woods; mahogany, rosewood, ebony, cedar and other valuable woods; " cascalote " or divi-divi; jalap root (Ipomaea); sarsaparilla (Smilax); nuts and fruits.
The jambs were of dressed stone, usually plain, and the longer lintels were of zapote wood; some of them, where protected from the weather, are still to be seen, sometimes covered with inscriptions.