Plants of
South Australia
Calotis breviradiata
Compositae
Short-ray Burr-daisy
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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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Etymology

Calotis from the Greek 'kalos' meaning beautiful and 'otos' meaning ear, after the first species named in the genus, Calotis cuneifolia which has an ear-shaped pappus. Breviradiata from 'brevi' meaning short and 'radiatus' meaning spreading rays.

Distribution and status

Found in the south-west part of South Australia, north of the Nullarbor growing in dry water courses and claypans. Also found in Western Australia. Native. Uncommon in South Australia. Common in Western Australia.
Herbarium region: Nullarbor
NRM region: Alinytjara Wilurara
AVH map: SA distribution map (external link)

Plant description

Perennial herb to 40 cm high with erect or ascending stems and branches sparsely pubescent, often becoming woody at the base. Leaves sessile, cuneate to oblanceolate to 3 cm long and 4 mm wide; 1-5-toothed near the apex, narrowed at the base; sparsely pubescent. Flower-head solitary or in loose terminal cymes of 2-4 yellow daisy-flowers. Flowering between July and September. Fruits are round spiny fruit-head. Seeds are orange-brown archor-shaped seed to 3 mm long, with hairy winged margin at one end and spiny hairs at the other. Seed embryo type is spathulate fully developed.

Seed collection and propagation

Collect seeds between September and November. Collect mature seed heads that are dried and turning brown by picking off the heads and placing them in a paper bag. Be careful as the heads are spiny. Leave the heads in the paper bag to dry for at least a week. No further cleaning required if only the heads are collected. If other material were collected, use a sieve to separate the unwanted material. Whole heads can be stored with a desiccant such as dried silica beads or dry rice, in an air tight container in a cool and dry place. Seeds are non-dormant, viable seed should germinate readily.

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
41,000 (9.86 g)
41,000 (9.86 g)
100+7-Sep-2016DJD3407
Nullarbor
1-Nov-2017100%-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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