Seeds of South Australia
Poranthera huegelii (Euphorbiaceae)
Heath Poranthera
List of species for Poranthera
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Seed collecting:
November to February
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
 Near Threatened   [fluctuates, responds to fire; short-lived perennial]
Fleurieu (KAN02) 
 Near Threatened   [comes up after fire; reasonably good seed bank; fluctuates]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Data Deficient   [2 old records with imprecise locations]
St Vincent (EYB02)Eyre Yorke Block
 Regionally Extinct
Eyre Hills (EYB03) 
 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 Poranthera]
Name derivation:
Poranthera from the Greek 'porus' meaning opening or pore and 'anthera' meaning anther; referring to the terminal pores of the anther cells. Huegelii named after Baron Carl von Hugel (1795-1870), an Austrian traveller, plant collector and patron of horticulture.
Distribution:
Found on the southern Eyre Peninsula, Kangaroo Island and the southern Mount Lofty Ranges in South Australia, growing on higher ground, along roadside or firebreaks on lateritic clay, sand or loam. Also found in Western Australia.
Status:
Native. Uncommon in South Australia. Common in Western Australia.
Plant description:
Erect multi-stemmed, glabrous heath-like undershrubs with several to many stems to 25 cm high, becoming woody basally. Leaves alternate, crowded, linear to narrow-oblong, to 20 mm long and 2 mm, subacute, margins revolute and more or less concealing the paler underneath. Inflorescence a terminal head consisting of numerous umbels of white flowers. Flowering between October and January.
Fruit type:
Dark green to brown depressed globular capsule to 3 mm diameter with 3 lobed and 6 seeds.
Seed type:
Pale yellow to white sectoroid seed to 1 mm long and 0.6 mm wide, covered in white reticulate surface.
Embryo type:
Spatulate fully developed.
Seed collecting:
Collect individual mature capsules, those that are drying off, fat and contain dark hard seeds or break off the fruiting umbels to allow the capsules to continue to mature. Green capsules can be collected if the seeds are dark and hard.
Seed cleaning:
Place the capsules in a tray and leave to dry for one to two weeks. Then gently rub the capsules with a rubber bung to dislodge the seeds. Use a sieves 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 two collections, the seed viability were average to high, ranging from 80% to 100%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA4700 (0.81 g)13-Nov-2006DJD658
Kangaroo Island
1-Aug-2007100%-18°C
BGA1200 (0.33 g)15-2021-Nov-2006TST106
Southern Lofty
1-Aug-200780%-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.