Plants of
South Australia
Lepidium strongylophyllum
Cruciferae
Round-leaved Peppercress
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Regional Species Conservation Assessments per IBRA subregion.
Least concern
Near threatened
Rare
Vulnerable
Endangered
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Extinct
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Adelaide
Arkaroola
Ceduna
Coober Pedy
Hawker
Innamincka
Marla
Marree
Mount Gambier
Oodnadatta
Renmark
Wudinna
Keith
Yunta
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Botanical art

Kath Alcock paintings: 2.

Etymology

Lepidium from the Greek 'lepis' meaning a scale; referring to the appearance of the fruits. Strongylophyllum from the Greek 'strongylos' meaning round and 'phyllon' meaning a leaf; referring to the obovate leaf shape.

Distribution and status

Found scattered in the north-eastern corner of South Australia, growing on rocky plains and slopes. Also found in the Northern Territory and Queensland. Native. Common in South Australia. Uncommon in the Northern Territory. Common in Queensland.
Herbarium regions: Lake Eyre, Flinders Ranges, Eastern
NRM region: South Australian Arid Lands
AVH map: SA distribution map (external link)

Plant description

Erect perennial shrubs to 40 cm tall, glabrous, sometimes glaucous. Leaves obovate, to 30 mm long and 20 mm wide, leathery. Inflorescence an elongating spike with white flowers. Flowering between August and October. Fruits are brown elliptic pod to 7 mm long and 5.5 mm wide, winged in the upper half of the fruit, forming a notch one-sixth of the length of the fruit. Seeds are brown reinform seed to 3.5 mm long and 2 mm wide. Seed embryo type is bent.

Seed collection and propagation

Collect seeds between October and December. Collect maturing pods those turning pale brown with hard seeds inside. Be gentle with the pods as they split open easily. Place the pods in a tray and cover with paper to prevent seeds from popping out and leave to dry for a week. Then rub the dried pods gently by hand to dislodge the seeds. Use a sieve to separate the unwanted material. 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. From one collection, the seed viability was high, at 100%.

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
12,780 (58.8 g)
12,780 (58.8 g)
100+25-Oct-2007TST209
Lake Eyre
24-Jun-2020100%+5°C, -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.