The physical properties of the powder also give it a mild astringent action.
It has a sweet astringent taste, very soluble in water, but scarcely soluble in alcohol.
Iron in the intestine causes an astringent or constipating effect.
Calcium salts form insoluble soaps with fats, and combine with albumen in a manner which makes them soothing and astringent rather than irritating.
The fruit-stalk is very short, bearing a subglobose fruit an inch or rather more in diameter, of an orange-yellow colour, and with a sweetish astringent pulp. It is surrounded at the base by the persistent calyxlobes, which increase in size as the fruit ripens.