Seeds of South Australia
Amaranthus macrocarpus var. pallidus (Amaranthaceae)
Pale-fruit Amaranth
List of species for Amaranthus
Click on an image to enlarge it
Seed collecting:
January to December
Herbarium region:
Eastern
NRM region:
South Australian Arid Lands
AVH map:
Australian distribution map (external link)
SA Census:
Census of South Australian plants (external link)     [genus Amaranthus]
SA Flora:
Flora of South Australia Edition 5
Name derivation:
Amaranthus from the Greek 'a' meaning not and 'marantos' meaning withering, a name used for an everlasting flower. Macrocarpus from the Greek 'macros' meaning large and 'carpos' meaning fruit. Pallidus from Latin meaning pale, referring to the species' large, pale fruit.
Distribution:
Few records from the eastern region of South Australia, growing on flooded clay along drainage line and old river plain. Also found in Queensland and New South Wales.
Status:
Native. Rare in South Australia. Common in other states.
Plant description:
Erect or prostrate annual to 30 cm high. Leaves on petioles to 25 mm long, ovate, oblong or obovate. Inflorescence of dense, globose, axillary clusters to 8 mm long, with predominantly female flowers present.
Fruit type:
Clusters of globular spongy fruit, pale straw in colour. Differ from the other variety Amaranthus macrocarpus var. macrocarpus which has a dark brown or black fruit.
Seed type:
Semi-flat round black seeds to 1.5 mm across.
Embryo type:
Peripheral.
Seed collecting:
Collect mature capsules, those that are turning a pale straw colour and contain black seeds. Whole stem containing many clusters of fruit can be collected.
Seed cleaning:
Place the capsules/stems in a tray and leave to dry for two weeks. Then rub the capsules/stems gently by hand to dislodge the seeds. Use a sieve to separate the unwanted material. Be very 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.
Seed viability:
From one collection, the seed viability was average, at 60%.
Seed germination:
Seeds are non-dormant, viable seed should germinate readily.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA4500 (5.28 g)3013-May-2008RJB77874
Eastern
19-Sep-200860%-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.