Posidonia oceanica (L.) Delile

Chromosome number: 2n = 20 (den Hartog et al, 1987).

Reference: den Hartog, C.; Hennen, J.; Noten, T.M.P.A. & van Wijk, R.J. (1987). Chromosome numbers of the European seagrasses. Plant Systematics and Evolution 156, 55-59.