Seeds of South Australia
Lepidium strongylophyllum (Cruciferae)
Round-leaved Peppercress
List of species for Lepidium
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Seed collecting:
October to December
Herbarium regions:
Lake Eyre, Flinders Ranges, Eastern
NRM region:
South Australian Arid Lands
IBRA regions
Northern Flinders (FLB05)Flinders Lofty Block
 Rare   (IUCN: RA d(i,ii))   [restricted habitat, locally common, on rocky slopes]
Breakaways (STP01)Stony Plains
 Rare   (IUCN: RA d(ii))   [on rocky slopes]
Oodnadatta (STP02) 
 Rare   (IUCN: RA d(i,ii))   [on rocky slopes]
Sturt Stony Desert (CHC02)Channel Country
 Rare   (IUCN: RA d(i,ii))   [localised]
RSCA map:
Regional Species Conservation Assessments per IBRA subregion. Please click the thumbnail map.
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Lepidium]
Name derivation:
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.
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.
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.
Fruit type:
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.
Seed type:
Brown reinform seed to 3.5 mm long and 2 mm wide.
Embryo type:
Seed collecting:
Collect maturing pods those turning pale brown with hard seeds inside. Be gentle with the pods as they split open easily.
Seed cleaning:
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.
Seed viability:
From one collection, the seed viability was high, at 100%.
Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
12780 (58.8 g)
12780 (58.8 g)
Lake Eyre
19-Sep-2008100%+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.