Seeds of South Australia
Trichodesma zeylanicum var. zeylanicum (Boraginaceae)
Cattle Bush
List of species for Trichodesma
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Seed collecting:
October to December
Herbarium regions:
North Western, Lake Eyre, Gairdner-Torrens, Flinders Ranges, Eastern
NRM regions:
Alinytjara Wilurara, South Australian Arid Lands
IBRA regions
Northern Flinders (FLB05)Flinders Lofty Block
 Least Concern
Central Flinders (FLB06) 
 Least Concern
Torrens (GAW06)Gawler
 Least Concern
Roxby (GAW07) 
 Least Concern
Maralinga (GVD03)Great Victoria Desert
 Least Concern   [should be more Herbarium records]
Kintore (GVD04) 
 Least Concern
Tallaringa (GVD05) 
 Rare   (IUCN: RA d(ii))   [unsuitable habitat]
Yellabinna (GVD06) 
 Least Concern   [should be more Herbarium records]
Carlisle (NUL01)Nullarbor
 Least Concern   [should be more Herbarium records]
Simpson Desert (SSD02)Simpson Strzelecki Dunefields
 Least Concern
Dieri (SSD03) 
 Least Concern
Warriner (SSD04) 
 Least Concern
Strzelecki Desert (SSD05) 
 Least Concern
Breakaways (STP01)Stony Plains
 Least Concern
Oodnadatta (STP02) 
 Least Concern
Murnpeowie (STP03) 
 Least Concern
Peake-Dennison Inlier (STP04) 
 Least Concern
Macumba (STP05) 
 Least Concern
Witjira (STP06) 
 Least Concern
Baltana (STP07) 
 Least Concern
Sturt Stony Desert (CHC02)Channel Country
 Least Concern
Diamantina-Eyre (CHC04) 
 Least Concern
Coongie (CHC06) 
 Least Concern
Lake Pure (CHC07) 
 Least Concern
Mann-Musgrave Block (CER01)Central Ranges
 Least Concern
Watarru (CER02) 
 Least Concern
Everard Block (CER03) 
 Least Concern
Tieyon (FIN03)Finke
 Least Concern
IBRA regions
2 of 6 subregionsFlinders Lofty BlockLeast Concern
2 of 8 subregionsGawlerLeast Concern
4 of 4 subregionsGreat Victoria DesertLeast Concern
, Rare
Carlisle (NUL01)NullarborLeast Concern
  [should be more Herbarium records]
4 of 4 subregionsSimpson Strzelecki DunefieldsLeast Concern
7 of 7 subregionsStony PlainsLeast Concern
4 of 4 subregionsChannel CountryLeast Concern
3 of 3 subregionsCentral RangesLeast Concern
Tieyon (FIN03)FinkeLeast Concern
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 Trichodesma]
Name derivation:
Trichodesma from the Greek 'thrix' or 'trikhos' meaning hair and 'desme' meaning a band or bundle; alluding to the twisted hairs or awns which terminate the anthers. Zeylanicum mean of or from Ceylon (Sri Lanka); probably referring to the location of the type specimen.
Found in the northern half of South Australia, growing in sandy soils. Also found in Western Australia, Northern Territory, Queensland and New South Wales.
Native. Common in South Australia. Common in the other states.
Plant description:
Annual herbs to perennials shrubs to 1.2 m high, woody at least at the base, with a robust tap root, sparsely to densely branched, more or less densely covered with hairs. Leaves opposite, and subpetiolate-cuneate below becoming alternate, sessile and cordate to rarely auriculate on or below the inflorescence, lanceolate to narrowly elliptic or oblong, rarely ovate, to 12 cm long and 2 cm wide, with long hairs often restricted to the veins on the under surface. Inflorescence terminal, with one to several clusters with leaf-like bracts, flowers dark-blue to rarely white. Sepals scarcely connate basally, with lobes linear-lanceolate to ovate, to 1.8 cm long and increasing after flowering, usually pointed. Corolla rotate with tube continued into spreading part, dark-blue to rarely white, to 18 mm long, lobes broadly ovate, abruptly tapering into an often coiled point, stamens attached just below the throat of the corolla, with anthers sessile, narrowly triangular, each with 2 rows of dorsal hairs spreading laterally and continued into a vertically coiled appendage and usually interlocking with those of the anthers to form a cone around the style. Flowering between May and October.
Fruit type:
Brown capsules along the spike, splitting open at maturity.
Seed type:
Mottled brown ovoid seed to 5 mm long and 4 mm wide, smooth.
Embryo type:
Spatulate fully developed.
Seed collecting:
Collect mature capsule, those that are drying off, turning brown and contain dark, hard seeds inside. Can collect individual capsule or break off whole spike.
Seed cleaning:
Place the capsules in a tray and leave to dry for one to two weeks. Then rub the fruits 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 95%.
Seeds stored:
LocationNo. of seeds
(weight grams)
of plants
Collection number
Collection location
% ViabilityStorage
4200 (43.6 g)
4200 (43.5 g)
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.