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Species profile—Senna acclinis


Plantae (plants) → Equisetopsida (land plants) → LeguminosaeSenna acclinis

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Species details

Plantae (plants)
Equisetopsida (land plants)
Scientific name
Senna acclinis (F.Muell.) Randell
WildNet taxon ID
Nature Conservation Act 1992 (NCA) status
Least concern
Conservation significant
Pest status
Senna acclinis is a shrub growing to 3 m in height. The leaves are spreading and 15 cm long. There are 5 to 7 pairs of leaflets, which are broad-elliptic in shape, with the largest to 5 cm long and 15 mm wide, and 10 to 20 mm apart on the rachis. The leaflets increase in size from the base of the rachis. The leaflets are glabrous, glaucous and bicolorous, with an obtuse apex, and no mucro. There are 1 or 2 glands between the lowest pairs of leaflets. The petioles are 20 to 40 mm long and terete. The inflorescences are racemose but subumbellate due to the contraction of the rachis and occur in the axils of the terminal leaves. The peduncle is 2 to 4 cm long, bearing 2 to 5 yellow flowers. The pedicels are 10 mm long and solitary. The sepals are subequal, 2 to 4 mm long and brown in colour. The petals are also subequal, 12 to 15 mm long, glabrous and yellow. There are 10 fertile stamens. The pods are 12 to 15 cm long and 6 to 8 mm wide, dark, slightly curved and oval in section due to the plump seeds. The seeds are glossy have a large, ovate aerole (Randall and Barlow, 1988; Randall, 1989; Wiecek, 2002).
The current distribution of Senna acclinis is very fragmented, extending from Merinda/Proserpine; one population at Shoalwater Bay Training Area (north of Rockhampton); and scattered fragmented populations from Gladstone to northern eastern New South Wales. There are three isolated populations inland, located at Expedition National Park (near Sedourie), Gurulmundi State Forest (near Wandoan) and Wonga Hills (18km W of Monogoribly). Senna acclinis is found in Eungella National Park; Expedition National Park; Veteran State Forest; Lamington National Park; Mebbin State Forest; Wietalaba National Park; Grevillea State Forest; Degalgil State Forest; Wongi State Forest; Toonumbar National Park; Main Range National Park and Mebbin State Forest (Queensland Herbarium, 2012).
Distributional limits
-19.9151131, 147.9177594
-28.2900746, 153.3981945
Range derivation
Range derived from extent of the taxon's verified records
Senna acclinis appears in a range of habitats and soil types. The species appears to prefer semi-evergreen vine-thickets, rainforest margins and adjacent open forests. Associated species and vegetation include: open woodland of Eucalyptus exserta with Lophostemon confertus; semi-evergreen vine thicket with Owenia venosa, Croton insularis, Exocarpos latifolius; in Acacia harpophylla emergent softwood scrub with Brachychiton rupestris, Flindersia collina, Geijera paniculata, Excoecaria dallachyana and Planchonella cotinifolia; semi-evergreen vinethicket on chocolate coloured soil with emergents including Acacia fasciculifera and Brachychiton rupestris, and common canopy species including Cassinia australe, Notelaea microcarpa, Backhousia angustifolia, Croton insularis, Planchonella cotinifolia and Excoecaria dallachyana; closed forest in head of gully with Brachychiton rupestris, Flindersia australis, Owenia venosa, Dendrocnide photinophylla; open forest of Eucalyptus grandis, Syncarpia procera and Alphitonia excelsa. The species is less commonly found in Melaleuca quinquenervia - Banksia ericifolia closed swampy heath and the back of coastal dune systems (Queensland Herbarium, 2012).
Flowering of Senna acclinis has been recorded January, March-May, August and November. Fruiting has been recorded in March and August (Queensland Herbarium, 2012).
Threatening processes
Threatening processes to Senna acclinis include habitat invasion by Lantana camara; possible threatening processes include change to fire regimes as a result of L. camara infestation and destruction of habitat by clearing of urban development and agriculture (Randall and Barlow, 1988; Wang, 1995; Queensland Herbarium, 2012).
Status notes
Senna acclinis is listed as Near Threatened under the Queensland Nature Conservation Act 1992
Management documents
Biosecurity Queensland on behalf of the National Lantana Management Group (2010). Plan to Protect Environmental Assets from lantana. Department of Employment, Economic Development and Innovation, Yeerongpilly, Queensland.
Management recommendations
Management recommendations for the protection of S. acclinis and its habitat include: the establishment of a protective buffer (0.25 ha) that excludes clearing with all S. acclinis at least 25 m inside; the control or eradication of Lantana camara on sites where S. acclinis occurs; and maintain current fire practices (Wang, 1995).
Occurs in the following Queensland pastoral districts: Burnett, Darling Downs, Leichardt, Moreton,
North Kennedy, Port Curtis, South Kennedy and Wide Bay. Also occurs in the following regions: New South Wales (Bostock and Holland, 2010; Queensland Herbarium, 2012).
Biosecurity Queensland on behalf of the National Lantana Management Group (2010). Plan to Protect Environmental Assets from Lantana. Department of Employment, Economic Development and Innovation, Yeerongpilly, Queensland.
Bostock, P.D. and Holland, A.E. (eds) (2010). Census of the Queensland Flora 2010. Queensland Herbarium, Department of Environment and Resource Management, Brisbane.
Queensland Herbarium (2012). Specimen label information. Queensland Herbarium. Accessed 16/01/2012.
Randell, B.R. and Barlow, B.A. in McCarthy, P.M. (Ed) (1998). Flora of Australia 12: 98.
Randell, B.R. (1989). Revision of Cassiinae in Australia 2. Senna Miller sect. Psilorhegma (J.Vogel) Irwin and Barneby. Journal of the Adelaide Botanic Gardens 12 (2): 200.
Wang, J. (1995). Senna acclinis Species Management Profile. Department of Natural Resources, Brisbane.
Wiecek, B. in Harden, G.J. (Ed) (2002). Flora of New South Wales Revised Edition 2: 374.
Profile author
Lynise Wearne (02/02/2012)

Other resources

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.

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

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Last updated
20 May 2024