Plants of
South Australia
Lobelia browniana
Campanulaceae
Brown's Lobelia
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Regional Species Conservation Assessments per IBRA subregion.
Least concern
Near threatened
Rare
Vulnerable
Endangered
Critically endangered
Extinct
Data deficient
Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
Marla
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Oodnadatta
Renmark
Wudinna
Keith
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Botanical art

Kath Alcock paintings: 8.

Etymology

Lobelia, named after Mathias de Lobel (1538-1616), physician to William of Orange and then botanist to James I of England. Browniana named after Robert Brown (1773-1858), a Scottish botanist and palaeobotanist who made important contributions to botany largely through his pioneering use of the microscope and accompany Matthew Flinders' expedition to Australia and collector of the type specimen for the species.

Distribution and status

Found on kangaroo Island and the upper South-east in south Australia, growing in well-drained sites in dry sclerophyll forest and Callitris woodland. Also found in Queensland, New South Wales, Victoria and Tasmania. Native. Rare in South Australia. Uncommon in Victoria. Common in the other states. Maybe more common post fire.
Herbarium regions: Kangaroo Island, South Eastern
NRM regions: Kangaroo Island, South East
AVH map: SA distribution map (external link)

Plant description

Erect succulent or semi-succulent glabrous annual to 50 cm high, with a solitary or several stems and often with a red-tinged. Leaves linear to narrowly oblanceolate, rarely narrowly lanceolate, to 60 mm long and 4.5 mm wide, usually reduced towards inflorescence, narrowly toothed (sometimes indistinctly), withered at anthesis. Inflorescence a 1-sided spike with 4-15 blue flowers. Flowering between November and February. Fruits are brown ovoid capsule to 12 mm long, swollen on upper side. Seeds brown, ellipsoid to ovoid, tiny to 0.3 mm long with a reticulate or wrinkled surface. Seed embryo type is linear, under-developed.

Seed collection and propagation

Collect seeds between November to March. Collect mature capsules that are fat, turning a pale straw-colour and containing brown seeds. Can collect individual capsules or break off the whole fruit spike if most capsules are mature. Place the capsules in a tray and leave to dry for one week. Rub the capsules gently by hand to dislodge the seeds. Use a sieve to separate the unwanted material. Be careful as the seeds are very small. Store the seeds with a desiccant such as dried silica beads or dry rice, in an air tight container in a cool and dry place.

Fire response

Obligate re-seeder as this species is a fire responsive true annual. No re-sprouting observed.

Longevity: <1 year

Time to flowering: < 1 year from seed.

Recovery work

In 2020-2021 this species was assessed post-fire in 1 year and 2 year old fire scars. A total of 550,000 seeds have been collected & banked for a population inside the 2020 fire scar. Further populations will be assessed and seeds collected on Kangaroo Island in 2021–2022. Germination screening testing the response to fire cues will be undertaken in 2021.This project was supported by the Emergency Seed Collecting Fund, a grant awarded to the Australian Seed Bank Partnership by the Royal Botanic Gardens, Kew on behalf of the UK Government.

Seeds stored:
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LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
25,000 (0.15 g)
25,000 (0.15 g)
1214-Dec-2017DJD3722
South Eastern
30-Jun-2018100%-18°C
Location: BGA — the seeds are stored at the Adelaide Botanic Gardens, MSB — the seeds are stored at the Millennium Seed Bank, Kew, England.
Number of plants: This is the number of plants from which the seeds were collected.
Collection location: The Herbarium of South Australia's region name.
% Viability: Percentage of filled healthy seeds determined by a cut test or x-ray.