Seeds of South Australia
Flaveria trinervia (Compositae)
Clustered Yellow-tops
List of species for Flaveria
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Seed collecting:
January to December
Herbarium regions:
Lake Eyre, Gairdner-Torrens, Flinders Ranges, Eastern
NRM region:
South Australian Arid Lands
IBRA regions
Northern Flinders (FLB05)Flinders Lofty Block
 Least Concern   [likes roadsides, heavy clay soils, native?]
Arcoona Plateau (GAW04)Gawler
 Rare   (IUCN: RA d(ii))   [southern limit]
Warriner (SSD04)Simpson Strzelecki Dunefields
 Near Threatened   [likes roadsides, heavy clay soils, native?]
Breakaways (STP01)Stony Plains
 Near Threatened   [likes roadsides, heavy clay soils, native?]
Baltana (STP07) 
 Least Concern   [likes roadsides, heavy clay soils, native?]
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 Flaveria]
Name derivation:
Flaveria from the Latin 'flavus' meaning yellow; referring to a yellow dye made from a Chilean species. Trinervia from the Latin 'tri' meaning three and 'nervum' meaning nerve; referring to the leaves with 3-veins.
Distribution:
Found in the north-east part of South Australia, growing in many types of wet habitats on saline and alkaline soils and highly disturbed areas. Also found in Western Australia, Northern Territory, Queensland and New South Wales.
Status:
Naturalised. Common in South Australia. Common in the other states.
Plant description:
Much-branched erect or procumbent annual herb to 75 cm tall with opposite branches often pinkish-red, mostly hairless. Leaves opposite, yellowish-green, narrowly elliptic to oblanceolate, to 75 mm long, 3-veined from the base, narrowing at the base into a pseudo-petiole, margin more or less finely toothed. Flower heads numerous in congested axillary and terminal heads, yellow with very short ray-florets. Flowers throughout the year.
Fruit type:
Creamy-brown papery head.
Seed type:
Black long ovoid seed to 3 mm long and 0.8 mm wide, with a number of striations
Embryo type:
Spatulate fully developed.
Seed collecting:
Collect heads that are matured, drying off and turning pale brown with hard black seeds.
Seed cleaning:
Place the heads in a tray for one to two week to dry. Then rub the heads gently with your hands 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.
Seed viability:
From one collection, the seed viability was high, at 95%.
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
BGA22000 (8.78 g)30+22-Aug-2010MJT297
Lake Eyre
1-Jan-201295%-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.