The Temperate Database is in the process of being updated, with new records being added and old ones being checked and brought up to date where necessary. This record has not yet been checked and updated.
Common Name: Spiny Naiad
Plant growing in native habitat
Photograph by: Panek
Najas marina is a perennial plant that can grow up to 0.50 metres tall.
It is harvested from the wild for local use as a food.
Cosmopolitan, found in most areas of the world, including Britain, but absent from colder regions.
Fresh or brackish water[
]. Ponds, lakes and slowly-moving rivers at elevations up to 2700 metres in China[
]. Brackish or highly alkaline waters of ponds and lakes to 1000 metres in America[
A submerged water plant, succeeding in shallow fresh or brackish water[
This is one of the few genera of plants where fertilization takes place under the surface of the water[
Dioecious, male and female plants must be grown if seed is required[
Young plant - raw[
Seed - we have no information on this species but suggest sowing the seed in situ as soon as it is ripe if this is possible. Otherwise store the seed in water in a cool place and sow it in situ in the spring.
Division in the growing season[