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Image Credit: Anna Povey – with permission
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Image Credit: Anna Povey – with permission
Scientific Name: Bolboschoenus caldwellii
Common Name: sea clubsedge
Family Classification (Clade): Monocots
Family: Cyperaceae
Threatened Species Status: Rare
Permit: It is an offence to collect, disturb, damage or destroy this species unless under permit.
Form Description: Summer-green, perennial plant with lime-green, tufted, leafy stems which are triangular in cross-section.
Height (m): 0.3 – 0.9
Flowers: In heads of 2-6 chestnut-brown, many-flowered spikelets.
Fruit: Nut – greenish to golden-brown, smooth and shining, 3.5mm long.
Municipality
Plant Communities
Habitat Notes
Shallow standing water, sometimes brackish water, growing in heavy black mud. North-east, Midlands and east coast.
Propagation Calendar
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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
Seed Information
Seed Collection
Seed is released within 3-14 days of seed maturity. Cut stalks with secateurs to collect, place upside down in a bag to dry, rub between hands to extract all seed and sieve to clean. If not sown soon after collection, seed requires several months of cold dry storage.
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
Surface sow seed in warm conditions. Heat treatment may improve results, especially for seed that is not fresh. Leaching (running water for 2-4 hours or soaking for 12 hours, changing the water every 4 hours) may also improve results. Bolboschoenus species have been used successfully in direct seeding.
Cutting & Division Information
Grown easily by division of suckers.