Ulva intestinalisLinnaeus

Tarmgrønske in Norwegian
Sea grass in English


The species Ulva intestinalis belongs to:


Photos of Ulva intestinalis (3):

  • Photo of Ulva intestinalis
  • Photo of Ulva intestinalis
  • Photo of Ulva intestinalis

1 of 3: Habit

Photo of Ulva intestinalis
The species often grows abundantly in rock pools in the upper part of the intertidal Photo: © Kjersti SjøtunTerms of use

Note: The species is in common in the intertidal. The thallus is 10-30 cm long, hollow and normally unbranched, and tapers gradually towards the base. It may sometimes be compressed. The chloroplast is hood-shaped and usually placed in the apical end of the cell, and contains one pyrenoid.

2 of 3: Overview of thallus

Photo of Ulva intestinalis
Hollow thallus, which tapers gradually towards the base Photo: © Kjersti SjøtunTerms of use

3 of 3: Cell structure

Photo of Ulva intestinalis
Each cell contains a hood-shaped chloroplast which is placed in the apical part of the cell. The chloroplast contains one pyrenoid, which is clearly seen in some cells (arrows) Photo: © Kjersti SjøtunTerms of use

Closest relatives

Other species in the same genus (Ulva):