Obbens, F.J. (24 June 2011), Five new species of Calandrinia (Portulacaceae) from Western Australia with additional information on morphological observations. Nuytsia 21(1): 9-12, Figs 3, 6, 7A-C APC [tax. nov.]

• Type: ca. 7 km east of the Shaw River along the Marble Bar-Hillside Road, then follow minor track north for ca. 400 m. Area referred to as the Spear Hills, and is ca. 60 km SW at Marble Bar, Western Australia, 28 May 2004, F. Obbens & B. Bromilow FO 16/04 (holo: PERTH 06609570).

taxonomic synonym: Calandrinia sp. Pinga (T.R.Lally TRL 722) WA Herbarium [n/a]

• APC Dist.: WA

• Etymology: From the Latin penta (five) and valvis (valved), in reference to the normally five-valved capsules found in this taxon.

Obbens, F.J. (18 December 2012), Isotypes for Calandrinia pentavalvis. Nuytsia 22(6): 483 [secondary reference]

• Type: "c. 7 km east of the Shaw River crossing along Marble Bar–Hillside Road, then follow minor track north for c. 400 m. Area referred to as the Spear Hills, and is c. 60 km south-west of Marble Bar, Western Australia, 28 May 2004, F. Obbens & B. Bromilow FO 16/04 (holo: PERTH 06609570; iso: AD, CANB, MEL)."

Biggs, L.J. & Parker, C.M. (21 November 2013), Updates to Western Australia's vascular plant census for 2012. Nuytsia 23: 510 [secondary reference]

taxonomic synonym: Calandrinia sp. Pinga (T.R.Lally TRL 722) WA Herbarium [n/a]

Hershkovitz, M.A. (21 September 2020), Rumicastrum Ulbrich (Montiaceae): a beautiful name for the Australian calandrinias. Phytologia 102(3): 120 [basionym]

basionym of: Rumicastrum pentavalve (Obbens) Hershk. legitimate

Hershkovitz, M.A. (September 2023), Notes on the taxonomy of Parakeelya Hershk. (Montiaceae). International Journal of Scientific Development and Research 8(9): 119 [basionym]

basionym of: Parakeelya pentavalvis (Obbens) Hershk. legitimate

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