Seeds of South Australia
Veronica decorosa (Scrophulariaceae)
Showy speedwell
List of species for Veronica
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Seed collecting:
November to January
Herbarium regions:
Flinders Ranges, Eastern, Eyre Peninsula, Northern Lofty, Murray
NRM regions:
Northern and Yorke, South Australian Arid Lands
IBRA region
Broughton (FLB02)Flinders Lofty Block
 Endangered   (IUCN: EN D)   (Probable Decline)   [perennial shrublet]
Olary Spur (FLB03) 
 Endangered   (IUCN: EN D)   (Probable Decline)
Southern Flinders (FLB04) 
 Endangered   (IUCN: EN D)   (Probable Decline)
Northern Flinders (FLB05) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii); D2)   (Probable Decline)   [goats, climate sensitive]
Central Flinders (FLB06) 
 Rare   (IUCN: RA d(i,ii))   [in Wilpena]
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 Veronica]
Name derivation:
Veronica possibly named after Saint Veronica, a nun who died in Milan in 1497.  Alternatively from the Latin 'vera' and 'icon' meaning true image. This is in reference to the legend of the miraculous imprint of the face of Christ on a headcloth that Saint Veronica offered Christ on his way to crucifixion. Decorosa from the Latin 'decus' meaning beautiful or decorative.
Distribution:
Endemic to South Australia and found in rocky gullies and ridges mainly in the Flinders Ranges.
Status:
Native. Rare in South Australia.
Plant description:
Bushy short lived perennial shrub to 1 m tall. Leaves are long and straight with fine serrations along the edges. Flowers are white with pink veins on the inside of the four petals. Flowering in winter and spring.
Fruit type:
Pale brown capsules along a fruit-spike, containing numerous small seeds.
Seed type:
Small convex dark brown seeds to 2 mm long with a wrinkled surface.
Embryo type:
Linear under-developed.
Seed collecting:
Either collect the seed capsules by running your fingers along the spike or break the whole fruit-spike off. Collect capsules that are brown but have not split with brown seeds inside.
Seed cleaning:
Place the capsules or fruit-spikes in a tray and leave to dry for 1 to 2 weeks. Then rub the capsules by hand or 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 four collections, the seed viability were low to high, ranging from  30% to 90%.
Seed germination:
This species has morphophysiological dormancy that can be overcome to promote germination.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
9500 (8.58 g)
9500 (8.58 g)
50+12-Jan-2006DDC1455
Flinders Ranges
8-Aug-200630%+5°C, -18°C
BGA1000 (0.9618 g)730-Dec-2005KHB36
Flinders Ranges
8-Aug-200690%-18°C
BGA2000 (2.8292 g)13-Jan-2006DDC14618-Aug-200675%-18°C
MJT2081-Jan-2012-18°C
BGA2966 (3.13 g)30+26-Nov-2013KHB824
Flinders Ranges
24-Mar-201590%+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.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
Apr-0992%48 d83 d cold stratification at 5°C, 80% relative humidity 1 week;
1% agar;
Incubated under spring/autumn conditions
Jun-0988%28 d70 d
1% agar with 100 mg/L potassium nitrate;
Incubated under spring/autumn conditions
Apr-0984%41 d83 d warm stratification at 40°C, 44% humidity 2 weeks;
1% agar;
Incubated under spring/autumn conditions
Oct-0978%14 d21 d
1% agar with 100 mg/L potassium nitrate;
Incubated under winter conditions
Oct-0977%21 d49 d
1% agar with 100 mg/L potassium nitrate;
Incubated under spring/autumn conditions
Feb-0972%34 d62 d
1% agar with 100 mg/L potassium nitrate;
Incubated under spring/autumn conditions
Oct-0969%41 d55 d
1% agar with 100 mg/L potassium nitrate;
Incubated under spring/autumn conditions
Apr-0968%55 d124 d warm stratification at 40°C, 44% humidity 1 week;
1% agar;
Incubated under spring/autumn conditions
Apr-0968%48 d118 d cold stratification 5°C, 80% relative humidity 2 weeks;
1% agar;
Incubated under spring/autumn conditions
Oct-0968%28 d55 d
1% agar with 100 mg/L potassium nitrate;
Incubated under spring/autumn conditions
Apr-0964%35 d104 d cold stratification 5°C, 80% relative humidity 4 weeks;
1% agar;
Incubated under spring/autumn conditions
Apr-0964%35 d97 d warm stratification at 40°C, 44% humidity 4 weeks;
1% agar;
Incubated under spring/autumn conditions
Oct-0960%35 d49 d
1% agar with 100 mg/L potassium nitrate;
Incubated under spring/autumn conditions
Oct-0956%14 d55 d
1% agar with 100 mg/L potassium nitrate;
Incubated under winter conditions
Oct-0950%21 d78 d
1% agar with 100 mg/L potassium nitrate;
Incubated under winter conditions
Oct-0946%14 dNA
1% agar with 100 mg/L potassium nitrate;
Incubated under winter conditions
Feb-0944%34 dNA
1% agar;
Incubated under spring/autumn conditions
Feb-1034%27 dNA
1% agar with 250 mg/L gibberellic acid (pH 6.5);
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)