Splachnidium rugosum, the deadman's fingers or gummy weed, is a species of seaweed in New Zealand.

[1][2][3] A small seaweed that grows on rocks near the shore and in the intertidal zone, tubular, which is filled with a clear gooey substance.

Native to New Zealand, and known across the southern hemisphere, from Tristan da Cunha to South Africa to Australia.

[4][2] Community scientists using the platform INaturalist have identified superficially morphologically similar specimens across the southern Hemisphere using user-uploaded photos.

This Phaeophyceae (or brown alga) article is a stub.