Seeds of South Australia
Anthocercis angustifolia (Solanaceae)
Narrow-leaf Ray-flower
List of species for Anthocercis
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Seed collecting:
October to January
Herbarium regions:
Flinders Ranges, Northern Lofty, Southern Lofty
NRM regions:
Adelaide and Mount Lofty Ranges, Northern and Yorke, South Australian Arid Lands
IBRA region
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Rare   (IUCN: RA d(i,ii))   [comes up after fire; very limited; at Morialta/Blackhill; foot traffic & olives - threats]
Southern Flinders (FLB04) 
 Rare   (IUCN: RA d(i,ii))   (Probable Decline)   [after fire]
Central Flinders (FLB06) 
 Rare   (IUCN: RA d(ii))   [ephemeral; comes up after fire; localised spp]
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 Anthocercis]
Name derivation:
Anthocercis from the Greek 'anthos', meaning a flower and 'kerkis', meaning a ray, referring to the narrow corolla lobes. Angustifolia from the Latin 'angustus' meaning narrow and 'folius' meaning a leaf, referring to the narrow leaves of this species.
Distribution:
Endemic to South Australia and found in the Flinders Ranges and the southern Mount Lofty Ranges growing on steep rocky slopes on clay-loam; prolific particularly after fires. 
Status:
Native. Rare in South Australia.
Plant description:
An open erect shrub to 2 m tall, covered in fine hairs. Leaves linear, rarely narrowly elliptic to obovate; sessile, to 50 mm long and 6 mm wide (juvenile leaves larger); entire, pubescent, the lower leaves glabrescent. Flowers solitary; large white to creamy-yellow with five star-like petals. Flowering between May and November.
Fruit type:
Papery brown ovoid to pear-shaped capsule to 9 mm long, containing numerous seeds.
Seed type:
Bean-shaped brown seeds to 3 mm long and covered with honeycomb depressions.
Embryo type:
Linear fully developed.
Seed collecting:
Collect maturing capsules, those that are turning brown with hard brown seeds inside. Monitor the plants as the capsules will dry, split and disperse the seeds in a short space of time. Using of a small bag (ie. Organza bags) to enclose the developing capsules will help to increase the chances of collecting sufficient viable seeds.
Seed cleaning:
Place the capsules in a tray and leave to dry for a week. Then gently rub the capsules 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 two collections, the seed viability was high at 100%.
Seed germination:
This species is generally difficult to germinate, it has physiological dormancy and complex germination requirements.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
4500 (5.96 g)
4500 (5.96 g)
30+10-Nov-2007TST182
Southern Lofty
19-Sep-2008100%+5°C, -18°C
BGA5300 (7.48 g)40+22-Dec-2008KHB208
Southern Lofty
20-Jul-2009100%-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.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
July 20080%NANA None.
Wet filter paper placed over propagating sand.
Incubated under winter conditions
July 20080%NANA 6 weeks in 45°C oven.
Wet filter paper placed over propagating sand.
Incubated under winter conditions
July 20080%NANA 6 weeks in 45°C oven followed by 15mins exposure to aerosol smoke in a smoke tent.
Wet filter paper placed over propagating sand.
Incubated under winter conditions
July 20080%NANA Leaching in filtered water on an agitator (72hrs).
Wet filter paper placed over propagating sand.
Incubated under winter conditions
April 20090%NANA None.
1% water agar.
Incubated under spring/autumn conditions
April 20090%NANA None.
1% water agar supplemented with 250mg/L GA3.
Incubated under spring/autumn conditions
April 20090%NANA None.
1% water agar supplemented with 100mg/L KNO3.
Incubated under spring/autumn 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)