Seeds of South Australia
Calandrinia disperma (Portulacaceae)
Two-seeds Purslane
List of species for Calandrinia
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Seed collecting:
September to January
Herbarium regions:
North Western, Nullarbor, Gairdner-Torrens, Eyre Peninsula
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, South Australian Arid Lands
IBRA regions
Eyre Mallee (EYB05)Eyre Yorke Block
 Rare   (IUCN: RA d(i,ii))
Gawler Volcanics (GAW02)Gawler
 Near Threatened
Arcoona Plateau (GAW04) 
 Rare   (IUCN: RA d(i,ii))
Kingoonya (GAW05) 
 Near Threatened
Roxby (GAW07) 
 Rare   (IUCN: RA d(i,ii))   [edge of range; limited habitat]
Commonwealth Hill (GAW08) 
 Least Concern
Maralinga (GVD03)Great Victoria Desert
 Least Concern
Kintore (GVD04) 
 Near Threatened
Yellabinna (GVD06) 
 Near Threatened
Mann-Musgrave Block (CER01)Central Ranges
 Near Threatened
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 Calandrinia]
Name derivation:
Calandrinia named after Jean-Louis Calandrini (1703-1758), a Swiss scientist, professor of mathematics and philosophy. Disperma from the Greek 'di' meaning two and 'spermus' meaning a seed; referring to its capsule only having 2 seeds.
Distribution:
Found scattered in the central and north-western parts in South Australia, growing on red sand dunes. Also found in Western Australia, Northern Territory and New South Wales.
Status:
Native. Common in South Australia. Uncommon in new South Wales. Common in the other states.
Plant description:
Decumbent orange-red annual with stems to 50 cm long. Leaves basal and on lower parts of flowering stems, alternate, sessile, linear to terete, to 50 mm long and 2 mm wide. Inflorescence an open spreading panicle that curved upwards in fruit, with clusters of small pink flowers. Flowering between July and November.
Fruit type:
Orange-brown  pear-shaped capsule to 6 mm long, broadest below the middle, abruptly swollen at the base with 3-valves, opening by a terminal pore with only 2 seeds.
Seed type:
Dark red-brown narrow-reniform seed to 1.8 mm long and 0.7 mm wide, with small tubercules at the narrow end.
Embryo type:
Peripheral.
Seed collecting:
Collect mature capsules, those that are turning a Orange-brown colour and contain dark seeds.
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.