Plants of
South Australia
Parietaria debilis
Urticaceae
Shade Pellitory
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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
Marree
Mount Gambier
Oodnadatta
Renmark
Wudinna
Keith
Yunta
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Botanical art

Kath Alcock paintings: 2.

Etymology

Parietaria from the Latin 'paries' meaning a wall, referring to some species growing on old walls. The name was used by the Roman naturalist and philosopher Pliny. Debilis from Latin meaning weak, frail, small, alluding to its habit.

Distribution and status

Found in the southern and the far north-western parts of South Australia, growing in shaded habitats under shrubs. Also found in all States. Native. Common in South Australia. Rare in Tasmania. Uncommon in the Northern Territory and Queensland. Common in the other States.
Herbarium regions: North Western, Nullarbor, Gairdner-Torrens, Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray, Yorke Peninsula, Southern Lofty, Kangaroo Island, South Eastern
NRM regions: Adelaide and Mount Lofty Ranges, Alinytjara Wilurara, Eyre Peninsula, Kangaroo Island, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin, South East
AVH map: SA distribution map (external link)

Plant description

Annual herb to 30 cm high; not woody at base; stems erect, sometimes ascending, sometimes rooting at nodes; densely covered in curved and hooked hairs. Leaf-blade ovate to broadly ovate, to 45 mm long and 18 mm wide; more or less delicate, 3-nerved; base subcordate, cuneate or truncate; apex blunt or obtusely acuminate; midvein straight, the lateral veins with delicate tertiary veins. Inflorescence a cluster of 2–10 small green flowers. Flowering between August and November. Fruits are long brown capsule in axils of leaves, with one seed. Seeds are shiny dark brown ovoid seed to 1.5 mm long and 0.7 mm wide.

Seed collection and propagation

Collect seeds between September and January. Collect capsules that are turning brown by break off stems with numerous mature capsules. Place the plant material in a tray and leave to dry for one to two weeks. Then rub the plant with a rubber bung to dislodge the seeds. Use a sieve to separate any 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.

Seeds stored:
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LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
 
MSB

1,000 (0.331 g)
2020-Nov-2007RJB76163
South Eastern
100%
BGA2,700 (0.42 g)100+7-Sep-2016JRG437
Eyre Peninsula
1-Nov-201775%-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.
Germination table:
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