Sida spenceriana

Sida spenceriana is a small plant in the family Malvaceae found in Queensland, the Northern Territory and Western Australia[4][5]

Sida spenceriana
DD (TPWCA)[1]
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malvales
Family: Malvaceae
Genus: Sida
Species:
S. spenceriana
Binomial name
Sida spenceriana
Occurrence data from AVH

Description

Sida spenceriana is a herb or shrub, which has hairy stems. The leaves are not lobed, have entire margins and are 10–24 mm long by 1.5–3 mm wide, have a covering of stellate hairs. There are stipules (7–10 mm long) which persist in with the older leaves. The flowere has a pedicel (15–30 mm) and the perianth consists of two whorls (both calyx and corolla). It, too, has stellate hairs. The calyx is green, 4 mm long, and the lobes are fused joined for half or more of their length. The corolla is yellow, without a hairy covering and is 6 mm long. There are many stamens which are united in a staminal tube around the style. The anthers are 0.5 mm long. The ovary is quite smooth. There is a single style (2.7 mm long) which has five or numerous style branches or lobes, which are mostly smooth.[4]

A further description is found in (Barker, 2007),[6] where the calyx is described as being sometimes ribbed but not 10-ribbed at the base, and further, that this species has 13-15 mericarps.

The fruits are schizocarps. It flowers in August (in Western Australia).[4]

Distribution

In Western Australia, it is found in the IBRA bioregions of Tanami and Victoria Bonaparte.[4] in the Northern Territory it is found in the IBRA bioregions of Gulf Plains, and Mitchell Grass Downs.[1]

Taxonomy

Sida spenceriana was first described in 1885 by Ferdinand von Mueller[2][3] from a specimen (MEL 0053777A) collected by Jessie Spencer ("Mrs F. Spencer") "at Yappunyah and Thargomindah close to the Paroo River" in 1885.[3][7] The specific epithet, spenceriana, honours her.[7]

Conservation status

In Western Australia, it is listed as "not threatened",[4] while in the Northern Territory it is listed as "data deficient",[1] and in Queensland as of "least concern."[8]

References
  1. "NTFlora Factsheet: Sida spenceriana". NTFlora, Northern Territory Government.
  2. "Sida spenceriana". Australian Plant Name Index (APNI), IBIS database. Centre for Plant Biodiversity Research, Australian Government. Retrieved 2 September 2019.
  3. Mueller, F.J.H. von (1885) Definitions of some new Australian plants. Southern Science Record n.s 1: 75. Retrieved 2 September 2019.
  4. "Sida spenceriana". FloraBase. Western Australian Government Department of Parks and Wildlife. Retrieved 2 September 2019.
  5. Sida spenceriana occurrence data from Australasian Virtual Herbarium Retrieved 2 September 2019
  6. Barker, R.M. (2007). "Two newly described species and a draft key to the species of Sida s. lat. from Western Australia" (PDF). Nuytsia. 17: 30.
  7. Maroske, S. & Vaughan, A. (2014) "Ferdinand Mueller's female plant collectors: a biographical register", Muelleria 32: 92-172.
  8. WetlandInfo: Sida spenceriana, Queensland Government, Department of Environment and Science. Retrieved 2 September 2019.
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