Seeds of South Australia
Drosera stricticaulis (Droseraceae)
Erect Sundew
List of species for Drosera
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Seed collecting:
October to December
Herbarium region:
Eyre Peninsula
NRM region:
Eyre Peninsula
IBRA region
Eyre Hills (EYB03)Eyre Yorke Block
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Definite Decline)   [limited habitat, weeds, climate change - threats]
Talia (EYB04) 
 Vulnerable   (IUCN: VU B2ab(i,ii,iii))   (Definite Decline)   [limited habitat, weeds, climate change - threats]
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 Drosera]
SA Flora:
Flora of South Australia Edition 5
Name derivation:
Drosera from the Greek 'droseros' meaning dewy, alluding to the glistening hairs of the glandular leaf laminae. Stricticaulis means upright stems, alluding to the erect flower-stalk.
Distribution:
Found on southern Eyre Peninsula and on Dutchmans Stern in the Flinders Ranges in South Australia, growing on sandy clay- loam along watercourses and granite outcrops. Also found in Western Australia.
Status:
Native. Rare in South Australia. Uncommon in Western Australia.
Plant description:
Perennial, yellow-green herb, annual  with a white, generally glabrous, minutely tuberculate stem tuber; erect stem, usually sparsely branched distally; minutely glandular-hairy. Stem leaves alternate in clusters of 3, circular, cup-shaped, peltate, to 6 mm diameter. Inflorescence a terminal cymose panicle, 3–14-flowered; sepals narrowly ovate-lanceolate to 8 mm long and 4 mm wide; stalked glandular-hairy; petals pink, broadly obovate to 12 mm long and 10 mm wide. Flowering between August and November.
Fruit type:
Brown globose capsule, erect and enclosed in persistent sepals.
Seed type:
Black nail-shaped seed to 1.5 mm long, with a wrinkled surface.
Seed collecting:
Collect mature capsules, those that are fat, hard, turning brown and contain black seeds inside.
Seed cleaning:
Place the capsules in a tray and leave to dry for one to two weeks. Then rub the capsules gently 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 one collection, the seed viability was average, at 70%.
Seeds stored:
LocationNo. of seeds
(weight grams)
Number
of plants
Date
collected
Collection number
Collection location
Date
stored
% ViabilityStorage
temperature
BGA 
MSB
2750 (0.1356 g)
2750 (0.1356 g)
100+16-Oct-2012JRG27
Eyre Peninsula
27-Feb-201470%-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
Jun-1336%70 dNA
1% agar;
/ 6 weeks spring/autumn, 6 weeks winter
Jun-1312%70 dNA 250 mg/L gibberellic acid 4 d;
1% agar;
/ 6 weeks spring/autumn, 6 weeks winter
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)