Seeds of South Australia
Veronica derwentiana ssp. homalodonta (Scrophulariaceae)
Mount Lofty Speedwell
List of species for Veronica
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Seed collecting:
January to April
Herbarium region:
Southern Lofty
NRM region:
Adelaide and Mount Lofty Ranges
IBRA regions
Fleurieu (KAN02)Kanmantoo
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [2 main pops, Spring Mt, Kyeema, Gum Tree Gully]
Mount Lofty Ranges (FLB01)Flinders Lofty Block
 Endangered   (IUCN: EN B2ab(i,ii,iii))   (Probable Decline)   [localised; largest pop Devils Gully]
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. Derwentiana means of or from the Derwent River in south-eastern Tasmania; referring to where the species was first collected from. Homalodonta from the Greek 'homalos' meaning smooth, flat and 'odous' meaning tooth; referring to the flat toothed leaves.
Distribution:
Endemic to South Australia. Found in the wetter parts of the Mount Lofty Ranges.
Status:
Native. Very rare in South Australia.
Plant description:
Erect perennial shrub to 2 m tall with many stems arising from the base. Leaves are green, lance-shaped with serrations along the edges and arranged in pairs. Flowers are pale mauve along a long flower spike, appearing in late spring and summer.
Fruit type:
Brown capsules along a fruit-spike, containing numerous small seeds.
Seed type:
Small brown seeds to 1 mm long with a wrinkled surface.
Embryo type:
Linear fully 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 seed capsules or spike in a tray and leave to dry for a week. Then rub the capsules gently by hand or with a rubber bung to dislodge the seeds. Use a sieve to separate the unwanted material. Be careful as the seed are small. 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 11 collections, the seed viability were high, ranging from 95% to 100%.
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
5476 (5296) (1.15 - 0.038g g)
5750 (1.21 g)
516-Feb-2005DJD 116
Southern Lofty
28-Mar-200695%-18°C
BGA16571 (3.48 g)5-Apr-2005DJD 125
Southern Lofty
28-Mar-200695%-18°C
BGA15143+15095 (3.18+317 g)5-Apr-2005DJD 127
Southern Lofty
28-Mar-2006100%+5°C, -18°C
BGA1476 (0.31 g)27-Mar-2005DJD1218-Aug-2006100%-18°C
BGA2090 (0.44 g)27-Mar-2005DJD1268-Aug-2006100%-18°C
BGA6000 (0.98 g)17-Mar-2005Ivan Proberts
Southern Lofty
1-Aug-2007+5°C, -18°C
BGA8700 (1.38 g)1422-Feb-2007DJD767
Southern Lofty
1-Aug-2007100%+5°C, -18°C
BGA1600 (0.47 g)416-Apr-2008KHB150
Southern Lofty
19-Sep-2008100%+5°C, -18°C
BGA250 (0.0552 g)211-Mar-2010Mt Bold - Track27A
Southern Lofty
Jun-2010100%-18°C
BGA200 (0.054 g)215-Mar-2010Mt Bold - east side
Southern Lofty
Jun-2010100%-18°C
BGA4400 (2.3 g)318-Feb-2010Cherryville
Southern Lofty
Jun-201095%-18°C
BGA3500 (0.59 g)41-Jan-2010Wirra Birra - Ironbank
Southern Lofty
Jun-2010100%-18°C
BGA200 (0.0575 g)121-Feb-2010Hadrians Gully
Southern Lofty
Jun-2010100%-18°C
BGA250128-Feb-2010KHB370
Southern Lofty
Jun-2010N/C-18°C
PJA1711-Jan-2012-18°C
BGA2500 (0.6054 g)516-May-2011KHB583
Southern Lofty
1-Jan-2012-18°C
PJA1971-Jan-2012-18°C
BGA6000 (1.01 g)117-Mar-2005Ivan Proberts
Southern Lofty
95%-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
Dec-1496%28 d35 d leached in water 48 h;
moist sand;
Incubated under winter conditions
Dec-1496%14 d21 d 400 mg/L gibberellic acid + 20% smoke water 48 h;
moist sand;
Incubated under winter conditions
Dec-1496%14 d21 d 400 mg/L gibberellic acid 48 h;
moist sand;
Incubated under winter conditions
Apr-0992%13 d19 d
1% agar with 200 mg/L potassium nitrate;
Incubated under spring/autumn conditions
Feb-0988%13 d21 d
1% agar with 100 mg/L potassium nitrate;
Incubated under spring/autumn conditions
Apr-0988%13 d13 d
1% agar with 100 mg/L potassium nitrate;
Incubated under spring/autumn conditions
Apr-0984%13 d33 d
1% agar with 50 mg/L potassium nitrate;
Incubated under spring/autumn conditions
Feb-1072%7 d21 d
1% agar with 250 mg/L gibberellic acid (pH 6.5);
Incubated under spring/autumn conditions
Feb-0960%21 d62 d
1% agar;
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)