Raoulia hookeri

Raoulia hookeri in bloom on stony slopes in New Zealand
Raoulia hookeri

Mat-forming perennial of the Asteraceae family, endemic to New Zealand, where it colonizes gravel, open rocky grounds, and stony slopes of the two main islands, mainly in subalpine and alpine zones.

It forms a flat to very slightly domed, dense, and tight mat, which can spread widely on the ground. The leaves are gathered in rosettes significantly larger than those of Raoulia australis, well individualized, with spatulate leaves with a very characteristic rounded-truncated tip. The foliage is pale green to gray-green, covered with a silky tomentum that gives it a very soft silvery appearance, almost whitish-green under certain lights. This broad rosette habit and particularly pale color immediately distinguish the species within the genus.

The flowers are small whitish to cream capitula, not very visible, borne at ground level. Precise flowering data in the natural environment and in European cultivation are not reliably verified to be indicated here.

It requires perfect drainage, a poor mineral substrate, and full light exposure. Sensitive to stagnant humidity, it is preferably cultivated in a trough under glass shelter in winter in regions with rainy winters.