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Species profile—Sowerbaea subtilis

Classification

Plantae (plants) → Equisetopsida (land plants) → LaxmanniaceaeSowerbaea subtilis

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Species details

Kingdom
Plantae (plants)
Class
Equisetopsida (land plants)
Family
Laxmanniaceae
Scientific name
Sowerbaea subtilis D.A.Stewart
WildNet taxon ID
13796
Nature Conservation Act 1992 (NCA) status
Vulnerable
Back on Track (BoT) status
Low
Conservation significant
Yes
Confidential
No
Endemicity
Native
Pest status
Nil
Short Notes
BRI 192245
Description
Sowerbaea subtilis is a glabrous, tufted perennial herb that grows to about 30 to 40 cm high. The leaves are 10 to 30 cm long and 1 mm in diameter; pale green and cylindrical; they are somewhat succulent, bordered in the lower 1 to 2 cm by scarious sheathing margins. The scapes are leafless, erect 15 to 30 cm tall, and are externally similar to the leaves. The inflorescence is a many flowered terminal umbel, (flower cluster), of up to 15 flowers; the flower clusters are subtended by imbricate elliptical bracts; the outer bract is stiff, 5 mm long by 2 mm wide, with a conspicuous dark red midvein; the inner bracts are softer, scarious, laciniate to fimbriate at the margins; the pedicels elongate during floral development and reach 6 to 6.5 mm under the fruit. Perianth segments 6, equal, free, light pink and with a dark red midvein, 6 to 7 mm long by 2 to 2.5 mm wide. There are 3 stamens opposite the inner perianth segments and alternating with 3 staminodes; filaments flattened to 0.5 mm wide in the lower 1.0 mm, then abruptly contracted to 0.2 mm wide in the upper 0.5 mm; the anthers are pale yellow, 1.5 to 2 mm long, basifixed and truncate at the base, erect with 2 linear lobes opening longitudinally and extending to 1.75 times the height of the ovary at anthesis.
Sowerbaea subtilis differs from Sowerbaea juncea in being smaller in most dimensions, being about half as tall, much narrower at the tufted base, and having smaller flowers (Stewart, 1986).
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Distribution
Sowerbaea subtilis is conserved within Byfield National Park, Byfield State Forest and the Shoalwater Bay Military Reserve, north of Yeppoon, in Queensland. (Queensland Herbarium, 2011).
Distributional limits
-22.7234217, 150.6260719
-26.7601667, 153.1312222
Range derivation
Range derived from extent of the taxon's verified records
Habitat
Sowerbaea subtilis grows in sandy heath with Banksia robur, Melaleuca viridiflora, Eucalyptus umbra and Xanthorrhoea, and on the edge of swamps in sedgeland of Empodisma, Baumea and Baloskion (Wang, 1998; DSEWPC, 2012; Queensland Herbarium, 2012).
Reproduction
Sowerbaea subtilis has been collected in flower from August to September (Queensland Herbarium, 2011).
Threatening processes
The main potential threats to Sowerbaea subtilis include plant collection, inappropriately managed timber harvesting and changes in hydrology and salinity (DSEWPC, 2012).
Status notes
Sowerbaea subtilis is listed as Vulnerable under the Queensland Nature Conservation Act 1992
Management recommendations
Regional and local priority actions to support the recovery of Sowerbaea subtilis are outlined by DSEWPC (2012). A summary of these include: avoiding habitat loss, disturbance and modification (e.g. monitor known populations to identify key threats; monitor the progress of recovery, including the effectiveness of management actions and
the need to adapt them if necessary); increasing conservation information (raise awareness of Sowerbaea subtilis in the local community); and enabling recovery of additional sites and/or populations (e.g. undertake appropriate seed collection and storage; investigate options for linking, enhancing or establishing additional populations) (DSEWPC, 2012).
Notes
Occurs in the following Queensland pastoral district: Port Curtis. The species was previously listed as vulnerable under the EPBC Act 1999.
References
Department of Sustainability, Environment, Water, Population and Communities (DSEWPC) (2012). Sowerbaea subtilis in Species Profile and Threats Database, Department of Sustainability, Environment, Water, Population and Communities, Canberra. Accessed 27/06/2012. http://www.environment.gov.au/sprat.
Queensland Herbarium (2012). Specimen label information. Queensland Herbarium. Accessed 11/01/2012.
Stewart, D.A. (1976). Sowerbaea subtilis (Liliaceae), a new species from Queensland. Proceedings of the Royal Society of Queensland 87: 85.
Wang, J. (1998). Sowerbaea subtilis Species Management Profile. Department of Natural Resources, Brisbane.
Profile author
Ronald Booth (21/05/2012)

Other resources

The Australasian Virtual Herbarium (AVH)
Atlas of Living Australia

Data source

This profile data is sourced from the QLD Wildlife Data API using the Get species by ID function used under CC-By 4.0
https://apps.des.qld.gov.au/species/?op=getspeciesbyid&taxonid=13796

This information is sourced from the WildNet database managed by the Queensland Department of Environment and Science.

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Licence
Creative Commons Attribution 4.0 International (CC BY 4.0)
Last updated
7 September 2021
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