Seeds of South Australia
Orthrosanthus multiflorus (Iridaceae)
Morning Flag
List of species for Orthrosanthus
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Seed collecting:
November to January
Herbarium regions:
Eyre Peninsula, Southern Lofty, Kangaroo Island
NRM regions:
Adelaide and Mount Lofty Ranges, Eyre Peninsula, Kangaroo Island
IBRA regions
Kangaroo Island (KAN01)Kanmantoo
 Least Concern
Fleurieu (KAN02) 
 Data Deficient   [1 record, Kalymna; questionable]
Eyre Hills (EYB03)Eyre Yorke Block
 Vulnerable   (IUCN: VU D2)
Talia (EYB04) 
 Vulnerable   (IUCN: VU D2)
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 Orthrosanthus]
Name derivation:
Orthrosanthus from the Greek 'orthros' meaning morning and 'anthos' meaning flower; referring to the short-lived flowers which open before noon. Multiflorus from the Latin 'multus' meaning many and 'floris' meaning flower.  
Found on the bottom of the Eyre Peninsula, Kangaroo Island and the southern Mount Lofty Ranges in South Australia, growing in heath and stunted mallee on coastal dunes and limestone. Also found in Western Australia and Victoria.
Native. Uncommon in South Australia. Uncommon in Western Australia. Rare in Victoria.
Plant description:
Perennial sedge-like tuft to 60 cm high. Leaves to 50 cm long and 5 mm wide, glabrous, finely striate, with dry brown overlapping margins at the base. Inflorescence a long spike with scattered clusters of 3-7 large sky-blue flowers. Flowering between August and November.
Fruit type:
Brown capsule to 20 mm long scattered along the the top of stems.
Seed type:
Orange to brown ovoid seed to 1.2 mm long and 1 mm wide, with a wrinkled surface.
Embryo type:
Linear under-developed.
Seed collecting:
Collect mature capsules, those that are drying off and turning pale brown with hard brown seeds inside.
Seed cleaning:
Place the capsules in a tray and leave to dry for one to two weeks. Then rub the capsules 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
6500 (5.24 g)
6500 (5.24 g)
Kangaroo Island
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.