Scientific Name: Ruppia megacarpa

Common Name: largefruit seatassel

Family Classification (Clade): Monocots

Family: Ruppiaceae

Threatened Species Status: Rare

Permit: It is an offence to collect, disturb, damage or destroy this species unless under permit.

Form Description: Submerged aquatic herb, perennial, with stems often zig-zagged and slender leaves.

Height (m): 0.2 – 0.3

Flowers: Two small flowers in terminal spikes. Flowering stalk varies in length depending on water depth, and coils after pollination.

Fruit: Achene – usually 2-6mm long; turn black when mature.

Municipality
Break O’DayClarenceGlamorgan-Spring BayNorthern MidlandsTasman
Plant Communities
No data available for this species
Habitat Notes

Coastal creeks, estuaries and lagoons on the east coast.

General Notes

Aquatic plant.

Propagation Calendar

  • Flowering Month
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • Seed Collecting Month
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • Sowing Month
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
  • Cutting Month
    Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Propagation Method
Impractical Propagation material is too difficult to collect or conditions for propagation or cultivation are too specialized.

Seed Information

Seed Collection

Pollination occurs on or below the water surface.

Seed Treatment Method

Bog Method The seeds of many wetland species need to be kept wet to germinate. Punch a hole in the side of a recycled polyfoam box so that it holds water to the required depth. Sit the tubes in the box to germinate. Once germinated, punch holes in the bottom of the box to allow drainage.

Seed Treatment Notes

Sow in shallow water using the bog method.

Cutting & Division Information

Can be propagated easily by division of rhizomes.