pulverulent

Fronds mostly chaffy, woolly, or pulverulent, rarely smooth.

In this pulverulent state the gold is mixed with 1⁄12th of its weight of oxide of bismuth, together with a small quantity of borax and gum water.

When the calcination, however, is conducted at such a temperature that only about 75% of the water is lost, it yields a white pulverulent substance, known as “plaster of Paris,” which may readily be caused to recombine with water, forming a hard cement.

When the vein-stuff has been raised it is reduced to a pulverulent condition, to liberate the gold from the gangue.

Its wood is of a yellow colour merging into green, and has an almost pulverulent fracture; the flowers are yellow and conspicuous; and the fruit is dry and 4-winged.