In areas where this plant has established itself, it often does so to the total exclusion of all other plants. In its mountain habitat Callistemon pityoides comes into flower late in the season, but when it does bloom masses of small, dense, cream brushes are borne on the ends of the branches. Pink forms may be seen on rare occasions. The flowers are produced on a dense terminal spike out of which grows a leafy shoot as flowering comes to an end. Seed, which is very small, is produced in small almost globular woody capsules about 5-6 mm in diameter.
Seed is shed through a very small opening when ripe.
The leaves are narrow and sharply pointed, being 1.5 - 2.5 cm in length and less than 3 mm wide. The under-surface usually has scattered oil glands. Silky hairs cover the underside of the older leaves nearest the stem while the younger leaves are entirely covered on both sides with dense silky hairs. Callistemon pityoides can be readily propagated from seed extracted from the oldest capsules collected when at least one year old.