Seeds of South Australia
Logania saxatilis (Loganiaceae)
Rock Logania
List of species for Logania
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Seed collecting:
September to December
Herbarium regions:
Flinders Ranges, Northern Lofty, Murray, Southern Lofty
NRM regions:
Adelaide and Mount Lofty Ranges, Northern and Yorke, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(ii))
Broughton (FLB02) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [no recruitment]
Southern Flinders (FLB04) 
 Near Threatened   (Probable Decline)
Northern Flinders (FLB05) 
 Rare   (IUCN: RA d(ii))
Central Flinders (FLB06) 
 Rare   (IUCN: RA d(ii))
Braemer (MDD07)Murray Darling Depression
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [Not typical habitat]
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 Logania]
Name derivation:
Logania named after James Logan (1674-1751), an Irish born botanist who emigrated to North America, became Governor of Pennsylvania and wrote a book on the sexuality of plants. Saxatilis from Latin for rocky; referring to its rocky habitat.
Distribution:
Endemic to South Australia and found in the Flinders Ranges and the Mount Lofty Ranges, growing on steep-sided sandstone gorges in open woodland community and in crevices of rocky outcrops in shallow sandy or clay-rich soils.
Status:
Native. Rare in South Australia.
Plant description:
Erect multibranched, open shrub to 2.2 m high and 2.5 m wide, dioecious, with branches and leaves glabrous and glaucous. Leaves ovate or elliptic, to 80 mm long and 35 mm wide, margin entire, slightly thickened, lower surface with midrib slightly thickened and raised. Inflorescence a terminal panicles dividing into a number of clusters with many white unisexual flowers. Flowering between July to November.
Fruit type:
Orange-brown narrowly ovoid capsule to 10 mm long and 5 mm wide.
Seed type:
Black convex seed to 1.5 mm long and 1 mm wide, with a reticulated surface.
Embryo type:
Linear fully developed.
Seed collecting:
Collect maturing capsules, those that are fat, turning orange-brown in colour, have not open and contain hard black seeds.
Seed cleaning:
Place the capsules in a tray and leave to dry for one to two weeks for it to split. Then rub the capsules gently with a rubber bung 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 two collections, the seed viability were high, at 100%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
29150 (7 g)
29150 (7 g)
203-Dec-2006RJB70471
Southern Lofty
1-Aug-2007100%+5°C, -18°C
BGA55000 (12.24 g)50+7-Dec-2006KHB67
Southern Lofty
1-Aug-2007100%+5°C, -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.