Recurved Logania
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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
Display IBRA region text
Fleurieu (KAN02) | Kanmantoo | Rare (IUCN: RA d(ii)) (Probable Decline) [very little regeneration; comes & goes; smut attacks] |
Mount Lofty Ranges (FLB01) | Flinders Lofty Block | Near Threatened (Probable Decline) [very little regeneration; comes & goes; smut attacks] |
Botanical art
Kath Alcock paintings: 2
Prior names
Logania longifolia var. subsessilis
Etymology
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. Recurva, from the Latin 'recurvare', meaning to bend back, referring to its recurved leave margins.
Distribution and status
Endemic to South Australia and found in the southern Mount Lofty Ranges growing in low Eucalyptus obliqua forest with heath understorey. Native. Uncommon in South Australia.
Herbarium regions: Southern Lofty, Green Adelaide
NRM region: Adelaide and Mount Lofty Ranges
AVH map: SA distribution map (external link)
Plant description
Erect shrub to 1 m high; dioecious; stems glabrous to minutely hairy. Leaves linear to narrowly ovate, narrowing at the base, to 40 mm long and 8 mm wide; glabrous to minutely hairy,;margins recurved to revolute. Inflorescence in terminal compact clusters with white unisexual flowers. Flowering between August and October. Fruits are orange-brown ovoid capsule to 6 mm long and 4.5 mm wide. Seeds are shiny black convex seed to 1.3 mm long and 0.8 mm wide, with a reticulate surface. Seed embryo type is linear, fully-developed.
Seed collection and propagation
Collect seeds between October and December. Collect maturing capsules that are fat, turning orange-brown in colour, have not opened and contain hard black seeds. Place the capsules in a tray and leave to dry for one to two weeks to split. 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. From three collections, the seed viability was high, ranging from 85% to 95%. Seeds have morpho-physiological dormancy. Germination was enhanced after treatment with fire cues (dry heat and smoke water) and gibberellic acid.
Location | No. of seeds (weight grams) | Number of plants | Date collected | Collection number Collection location | Date stored | % Viability | Storage temperature | BGA | 8,100 (1.95 g) | 30 | 3-Dec-2007 | RJB74289 Southern Lofty | 19-Sep-2008 | 95% | -18°C |
BGA | 217,800 (47.03 g) | 200+ | 30-Nov-2017 | TST1388 Southern Lofty | 30-Jun-2018 | 90% | -18°C, -80°C |
BGA | 34,000 (6.44 g) | 30+ | 30-Nov-2017 | DJD3699 Southern Lofty | 24-Apr-2019 | 85% | -18°C, -80°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:
Display
Date | Result | T0 | T50 | Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod |
Feb-18 | 88% | 21 | 28 |
900 mg/L gibberellic acid for 24 h; 1% agar; Incubated under spring/autumn conditions |
Feb-18 | 78% | 21 | 28 |
900 mg/L gibberellic acid for 24 h; 1% agar; Incubated under winter conditions |
Feb-18 | 66% | 21 | 35 |
dry heat 100°C oven 15 min, 900 mg/L gibberellic acid + 10% smoke water for 24 h; 1% agar; Incubated under winter conditions |
Feb-18 | 62% | 21 | 35 |
dry heat 100°C oven 15 min, 900 mg/L gibberellic acid + 10% smoke water for 24 h; 1% agar; Incubated under spring/autumn conditions |
Feb-18 | 52% | 28 | 42 |
dry heat 100°C oven 15 min, 10% smoke water for 24 h; 1% agar; Incubated under spring/autumn conditions |
Feb-18 | 42% | 21 | NA |
10% smoke water for 24 h; 1% agar; Incubated under spring/autumn conditions |
Feb-18 | 40% | 28 | NA |
dry heat 100°C oven 15 min, 10% smoke water for 24 h; 1% agar; Incubated under winter conditions |
Feb-18 | 40% | 28 | NA |
10% smoke water for 24 h; 1% agar; Incubated under winter conditions |
Feb-18 | 12% | 35 | NA |
leached in water 24 h; 1% agar; Incubated under spring/autumn conditions |
Feb-18 | 2% | 35 | NA |
leached in water 24 h; 1% agar; Incubated under winter conditions |
Result: Maximum percentage of germination observed.
T0: Number of days before first germinant observed.
T50: Number of days to achieve 50% germination.
Pre-treatment: The initial treatment that the seeds received prior to placement on germination media.
Germination medium: The substrate that seeds were placed on for the duration of the germination experiment.
Incubator conditions:
Photoperiod: The duration of light exposure that the seeds were subject to during a 24 hour period.
Thermoperiod: The constant or diurnal temperatures that seeds were subject to during a 24 hour period.
Winter conditions: 15°C 20 h (3am→11pm); 5°C 4 h (11pm→3am) / 10 h light (8am→6pm); 14 h dark (6pm→8am)
Spring/Autumn conditions: 22°C 12 h (8am→8pm); 10°C 12 h (8pm→8am) / 12 h light (8am→8pm); 12 h dark (8pm→8am)
Summer conditions: 30°C 14 h (6am→8pm); 15°C 10 h (8pm→6am) / 14 h light (6am→8pm); 10 h dark (8pm→6am)