Hooker [1] is a branched species of marine red algae in the genus in the Polysiphonia in the Rhodophyta.

This marine alga grows as small cylindrical thalli branching to about 10 cm long.

The main axis is unbranched towards the base but bears lateral branches higher up.

[3] The branches, unlike Polysiphonia elongate, are only slightly constricted at their base.

[3] Globose cystocarps and bisporangia are recorded, the tetrasporangia are sparse.