Seeds of South Australia
Nicotiana rosulata ssp. rosulata (Solanaceae)
Rossette Tobacco
List of species for Nicotiana
Click on an image to enlarge it
Seed collecting:
October to December
Herbarium regions:
North Western, Lake Eyre, Gairdner-Torrens, Eyre Peninsula
NRM regions:
Alinytjara Wilurara, Eyre Peninsula, South Australian Arid Lands
IBRA regions
Kingoonya (GAW05)Gawler
 Vulnerable   (IUCN: VU D1+2)
Maralinga (GVD03)Great Victoria Desert
 Vulnerable   (IUCN: VU D1+2)
Tallaringa (GVD05) 
 Rare   (IUCN: RA d(ii))   [odd record]
Breakaways (STP01)Stony Plains
 Rare   (IUCN: RA d(ii))
Witjira (STP06) 
 Rare   (IUCN: RA d(ii))   [edge of range]
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 Nicotiana]
Name derivation:
Nicotiana named after Jean Nicot (1530-1600), a French Ambassador for the King of France to Lisbon in 1560, who sent the first tobacco plant to France. Rosulata means leaves borne in a rosette.
Distribution:
Found scattered in the western part of South Australia, growing in sandy or stony loamy soils in creeklines and hillsides. Also found in Western Australia and the Northern Territory.
Status:
Native. Uncommon in South Australia. Uncommon in the Northern Territory. Common in Western Australia.
Plant description:
Herb to 1 m high with sparse hairs, upper stem smooth. Leaves all or mostly at the base, to 15 rarely 21 cm long, elliptic, occasionally ovate or spathulate. Inflorescence an erect few branching panicle-spike with tubular white-cream flowers. This subspecies can be distinguish from Nicotiana rosulata ssp. ingulba by the lack of stem leaves, the non-glandular pubescence on the lower stems and leaves and by the corolla-tube usually less than 35 mm long. Flowering between April and September.
Fruit type:
Brown ellipsoid to ovoid capsule to 16 mm long.
Seed type:
Brown reniform seed to 1 mm long and 0.7 mm wide, covered in small tubercules.
Embryo type:
Linear fully developed.
Seed collecting:
Collect mature capsules, those that are brown or turning a pale straw colour and contain brown seeds. Can collect individual capsules or break off the whole fruit spike.
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 high, at 100%.