Carpha alpina, commonly known as small flower-rush, is a tufted perennial sedge from the family Cyperaceae.

[3] The numerous grey-green or red-green leaf-blades are stiff and flattened, with a yellow-brown sheath and a width ranging from 0.5-2 mm.

[4] The nut has a short stipe and is crowned by the rigid smooth or slightly hairy 3-5 mm long style-base.

[4] Carpha alpina is widespread throughout the montane and subalpine areas of Tasmania as well as in mountainous regions of Victoria and New South Wales in Australia.

[5] It has some resemblance to the grasses of the Rytidosperma genus, however, the flat grey-green or red-green leaves, combined with the lack of lemma and palea on the flowers, and the distinctive stipitate nut; differentiate it from those species.