Nototrichium divaricatum, also known as Na Pali rockwort or kuluʻī (Hawaiian), is a critically endangered perennial shrub in the pigweed family, Amaranthaceae, that is endemic to the island of Kauaʻi in Hawaii. It can only be found in three valleys on the northwestern end of the island, where it grows on north-facing cliffs and ridges.

Nototrichium divaricatum are densely branching shrubs that can grow up to 50 cm tall, with most parts covered with silvery-white hairs. Leaves are oppositely arranged, with leaf blades 3–7.5 cm long and 1–4.6 cm wide. Inflorescences bear several spikes, and are terminal and usually solitary, rarely 2 or 3 together, and compoundly branched. Each spike bears 8–30 small flowers.

This species was first described in 1996. There are possibly fewer than 3,000 N. divaricatum plants in existence.

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