Seeds of South Australia
Duboisia hopwoodii (Solanaceae)
Pituri
List of species for Duboisia
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Seed collecting:
November to February
Herbarium regions:
North Western, Lake Eyre, Nullarbor, Gairdner-Torrens, Eyre Peninsula, Murray
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, South Australian Arid Lands, South Australian Murray-Darling Basin
IBRA regions
SUMMARY
Eyre Mallee (EYB05)Eyre Yorke Block
 Rare   (IUCN: RA d(ii))   [narcotic plant]
South Olary Plain (MDD01)Murray Darling Depression
 Near Threatened   [likes deep sand & disturbance]
Murray Scroll Belt (RIV06)Riverina
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Definite Decline)
Myall Plains (GAW01)Gawler
 Vulnerable   (IUCN: VU D2)
Gawler Volcanics (GAW02) 
 Least Concern   (Probable Decline)   [narcotic plant]
Gawler Lakes (GAW03) 
 Least Concern   (Probable Decline)   [narcotic plant]
Arcoona Plateau (GAW04) 
 Rare   (IUCN: RA d(ii))   (Probable Decline)   [narcotic plant]
Kingoonya (GAW05) 
 Rare   (IUCN: RA d(ii))   [narcotic plant]
Roxby (GAW07) 
 Rare   (IUCN: RA d(ii))
Maralinga (GVD03)Great Victoria Desert
 Least Concern   [narcotic plant]
Kintore (GVD04) 
 Least Concern
Tallaringa (GVD05) 
 Least Concern
Yellabinna (GVD06) 
 Least Concern   [narcotic plant]
Mann-Musgrave Block (CER01)Central Ranges
 Least Concern
Watarru (CER02) 
 Least Concern
Everard Block (CER03) 
 Near Threatened
IBRA regions
DISPLAY ALL
Eyre Mallee (EYB05)Eyre Yorke BlockRare
  (IUCN: RA d(ii))   [narcotic plant]
South Olary Plain (MDD01)Murray Darling DepressionNear Threatened
  [likes deep sand & disturbance]
Murray Scroll Belt (RIV06)RiverinaVulnerable
  (IUCN: VU B2ab(i,ii,iii))   (Definite Decline)
6 of 8 subregionsGawlerLeast Concern
, Rare
, Vulnerable
4 of 4 subregionsGreat Victoria DesertLeast Concern
3 of 3 subregionsCentral RangesLeast Concern
, Near Threatened
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 Duboisia]
Name derivation:
Duboisia named after Charles Dubois (1656-1740), a London merchant and patron of botany. Hopwoodii named after Henry Hopwood (1813-1869), an English convict who established the town of Echuca in Victoria and a major sponsor of the Burke & Wills Victoria Exploring Expedition on which the type specimen was collected.
Distribution:
Found across the northern part of South Australia, growing on red or yellow sand or sandy loam, on sandy plains, low dunes or sandy risesAlso found in Western Australia, Northern Territory, Queensland and New South Wales.
Status:
Native. Common in South Australia. Uncommon in Queensland. Common in the other States.
Plant description:
Compact shrub to 4 m high and 3 m wide. Leaves narrow-elliptic or lanceolate to linear, to 12 cm long and 13 mm wide; glabrous. Inflorescence a short spike with white flowers with purple striations in throat. Flowering between August and November.
Fruit type:
Purple-black globular berry  to 6 mm in diameter.
Seed type:
Brown reniform seed to 3 mm long and 1.5 mm wide, with a net-like surface.
Embryo type:
Linear fully developed.
Seed collecting:
Collect berries that are ripe, purple-black with soft flesh and a hard seed inside.
Seed cleaning:
Place the berries in a tray and leave to dry for 2 weeks. Then rub the dried pods gentley to dislodge the seeds. Use a sieve to separate any 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.
Germination table:
DateResultT0T50Pre-treatment | Germination medium | Incubator: Photoperiod / Thermoperiod
Feb-1334%14 dNA
1% agar with 250 mg/L gibberellic acid (pH 6.5);
Incubated under spring/autumn conditions
Feb-1334%14 dNA
1% agar with 250 mg/L gibberellic acid (pH 6.5);
Incubated under summer conditions
Feb-1330%14NA 1500 mg/L gibberellic acid 24 h;
potting mix;
Nursery, summer
Feb-1318%14 dNA 1500 mg/L gibberellic acid 24 h;
1% agar;
Incubated under spring/autumn conditions
Feb-1312%28NA 1500 mg/L gibberellic acid 24 h;
potting mix;
Nursery, summer
Feb-138%14 dNA 1500 mg/L gibberellic acid 24 h;
moist sand;
Incubated under spring/autumn conditions
Feb-136%21 dNA 1500 mg/L gibberellic acid 24 h;
1% agar;
Incubated under summer conditions
Feb-132%42 dNA 1500 mg/L gibberellic acid 24 h;
moist sand;
Incubated under summer 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)