This species grows into a low, squat, woody, densely-branched shrub up to 0.5 1.8 or 2 m tall.
The branches are glabrous.
The leaves are glaucous (or yellowish when dry or during droughts), indistinctly veined, minutely rugulose (having a finely wrinkled surface and texture), 2–3 centimetres (0.79–1.18 in) long, and 6 to 13 mm broad.
Their shape is either narrowly obovate-cuneate or oblanceolate.

The flowers are produced from April to August, densely packed together within large inflorescences.
These inflorescences, or more specifically pseudanthia (also called 'flower heads'), are almost sessile (having a very short and indistinct peduncle), and hang downwards towards the ground.
They have a 2.5 centimetres (0.98 in) long receptacles which are conical in shape.
The flower head is surrounded by petal-like structures called 'involucral bracts', these are glabrous and arranged in a series of nine or ten rows.
The outer bracts have somewhat pointy ends, ovate in shape and minutely ciliate (having a fringe of hairs like an eyelash at their margins).
The inner bracts are oblong or spathulate-oblong in shape, and are longer than the actual flowers.
It is monoecious, both sexes occur in each flower.
The petals and sepals of the flowers are fused into a tube-like, 2.3 centimetres (0.91 in) long perianth-sheath.
This sheath is dilated, has three keels and six to seven veins on the lower portion, has an 8.5 mm lip, and generally glabrous except for a few setose (bristly, stiff) hairs from the base to near the upper parts of the outer surface.
The lip is slightly recurved, has a few scattered setose hairs on it, and has three teeth at its end.
The two outer of these teeth are longer than the middle one, at 1.4 mm long versus 1 mm.
All of the stamens are fertile.
Their filaments are 0.53 mm long and channelled.
The anthers are linear and 4.8 mm long.
The apical glands are 0.35 mm in length, ovate in shape and end in an acute point.
There are oblong and obtuse (blunt) hypogynous scales which are 1.4 mm in length.
The ovary is covered in long, spreading, yellow-brown hairs.
The style is 2.65 mm long, falcate, compressed, glabrous and tapers towards both ends.
The stigma is 5.3 mm long, with an obtuse end, grooved, and almost imperceptibly becomes the style.
This species grows into a low, squat, woody, densely-branched shrub up to 0.5 1.8 or 2 m tall. The branches are glabrous. The leaves are glaucous (or yellowish when dry or during droughts), indistinctly veined, minutely rugulose (having a finely wrinkled surface and texture), 2–3 centimetres (0.79–1.18 in) long, and 6 to 13 mm broad. Their shape is either narrowly obovate-cuneate or oblanceolate.
The flowers are produced from April to August, densely packed together within large inflorescences. These inflorescences, or more specifically pseudanthia (also called 'flower heads'), are almost sessile (having a very short and indistinct peduncle), and hang downwards towards the ground. They have a 2.5 centimetres (0.98 in) long receptacles which are conical in shape. The flower head is surrounded by petal-like structures called 'involucral bracts', these are glabrous and arranged in a series of nine or ten rows. The outer bracts have somewhat pointy ends, ovate in shape and minutely ciliate (having a fringe of hairs like an eyelash at their margins). The inner bracts are oblong or spathulate-oblong in shape, and are longer than the actual flowers. It is monoecious, both sexes occur in each flower. The petals and sepals of the flowers are fused into a tube-like, 2.3 centimetres (0.91 in) long perianth-sheath. This sheath is dilated, has three keels and six to seven veins on the lower portion, has an 8.5 mm lip, and generally glabrous except for a few setose (bristly, stiff) hairs from the base to near the upper parts of the outer surface. The lip is slightly recurved, has a few scattered setose hairs on it, and has three teeth at its end. The two outer of these teeth are longer than the middle one, at 1.4 mm long versus 1 mm. All of the stamens are fertile. Their filaments are 0.53 mm long and channelled. The anthers are linear and 4.8 mm long. The apical glands are 0.35 mm in length, ovate in shape and end in an acute point. There are oblong and obtuse (blunt) hypogynous scales which are 1.4 mm in length. The ovary is covered in long, spreading, yellow-brown hairs. The style is 2.65 mm long, falcate, compressed, glabrous and tapers towards both ends. The stigma is 5.3 mm long, with an obtuse end, grooved, and almost imperceptibly becomes the style.
Protea sulphurea