The remains of palms (Sabctl and Nipa) as well as of other large-leaved Monocotyledons are preserved.
Macabebe's principal industries are the cultivation of rice and sugar cane, the distilling of nipa alcohol, and the weaving of hemp and cotton fabrics.
It has important fisheries, and manufactures salt, pottery, roofing (made of nipa leaves), and nipa wine.
In these marshes grows the nipa palm, from which a liquor is distilled - there are a number of small distilleries here.
North of San Nicholas is Tondo, the most densely populated district; in the suburbs, outside the fire limits, the greater part of the inhabitants live in native houses of bamboo frames roofed and sided with nipa palm, and the thoroughfares consist of narrow streets and navigable streams. Paco, south-west of Intramuros, has some large cigar factories, and a large cemetery where the dead are buried in niches in two concentric circular walls.
More than one half of the dwellings in the city are mere shacks or nipa huts.
Nipa, made from the fibre of the agave or maguey plant and worn by women, is less common.
Alcohol is distilled from nipa, coco-nuts, burs (Corypha umbraculifera), cauong (Caryota onusta), pugahan (Caryota urens) and Indian corn.