Municipalities

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Scientific Name

Gahnia sieberiana

Family Name

CYPERACEAE

Common Name

Red-fruit Saw-sedge

Status

Height

to 2.5m

Flowers

Many clustered flowers in a dense, bristly honey-brown flowerhead which blackens with age, 25-90cm long.

Fruit

Nut

Form

Perennial plant with hollow stems, triangular in cross-section.

Municipalities

Break O'Day; Burnie; Central Coast; Circular Head; Devonport; Dorset; Georgetown; Kentish; King Island; Kingborough; Latrobe; Launceston; Meander Valley; West Tamar

Communities

Habitat Notes

In damp places, including the edges of swamps, wet heaths, roadside ditches and coastal areas in the NW, Midlands and NE.

Site Tolerance

Frost Tolerance

Soil Tolerance

General Notes

Germinates readily from seed. Seed has an after-ripening period of 12 months. Division of Gahnia spp. tends to have little success. Suitable below powerlines.

Propagation Details

Propagation Calendar

Flowering Months

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Seed Collecting Months

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Sowing Months

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Cutting Months

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Seed Information

Seed Collection

Nut 3-5mm long, bright red and shining. Most of the seed will remain held in the seedhead for at least a month. Cut the seedheads with secateurs and allow to dry, then vigorously thresh against a hard surface to extract seed.

Seed Treatment Method

Storage

Seed Storage Life

Viable Seeds Per Gram

Seed Treatment Notes

Germination Time

Suitable for Direct Seeding

Cuttings

Expected Time to Take Root

Expected Time to Plant Out

Propagation by Division N.B. Transplant only from nearby to avoid disease.

Cutting Notes