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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Eudicots
Cladus: Core eudicots
Cladus: Asterids
Cladus: Lamiids
Ordo: Gentianales

Familia: Rubiaceae
Subfamilia: Ixoroideae
Tribus: Gardenieae
Genus: Ridsdalea
Species: R. alba – R. anisophylloides – R. attopevensis – R. daweishanensis – R. eucodon – R. forsteniana – R. graciliflora – R. grandis – R. kampucheana – R. kassamensis – R. lagunensis – R. leytensis – R. macromera – R. merrillii – R. negrosensis – R. nigrescens – R. papuana – R. pseudoternifolia – R. puffiana – R. pulcherrima – R. schoemannii – R. sootepensis – R. sundaensis – R. thailandica – R. uranthera – R. uvarioides – R. venalis – R. vidalii – R. vietnamensis – R. wittii
Source(s) of checklist:

Ridsdalea J.T.Pereira & K.M.Wong, Sandakania 21: 42 (2016)

Type species: Ridsdalea grandis (Korth.) J.T.Pereira, Sandakania 21: 46 (2016)

Primary references

Wong, K.M. & Pereira, J.T. 2016. A taxonomic treatment of the Asiatic allies of Rothmannia (Rubiaceae: Gardenieae), including the new genera Ridsdalea and Singaporandia. Sandakania 21: 21–64. PDF Reference page.


Govaerts, R. et al. 2022. Ridsdalea in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2022 Feb. 18. Reference page.
Govaerts, R. et al. 2020. Ridsdalea in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Mar. 5. Reference page.
International Plant Names Index. 2022. Ridsdalea. Published online. Accessed: Feb. 18 2022. 2022. Ridsdalea. Missouri Botanical Garden. Published online. Accessed: 18 Feb. 2022.

Ridsdalea[1][2] is an Asian genus of plants in the family Rubiaceae; it was named after Dr. Colin Ridsdale. The type species is Ridsdalea grandis (Korth.) J.T.Pereira, which was renamed from the basionym Gardenia grandis.[1] Several other species have been reassigned from other genera: notably Rothmannia, which is now reserved for African species. Its native range is southern China, Indo-China, Malesia and New Guinea.

Plants of the World Online[3] and IPNI[2] list:

Ridsdalea alba K.Khamm.
Ridsdalea anisophylloides (Wernham) J.T.Pereira
Ridsdalea attopevensis (Pit.) J.T.Pereira
Ridsdalea daweishanensis (Y.M.Shui & W.H.Chen) J.T.Pereira
Ridsdalea eucodon (K.Schum.) J.T.Pereira
Ridsdalea forsteniana (Miq.) J.T.Pereira
Ridsdalea graciliflora (Merr.) J.T.Pereira
Ridsdalea grandis (Korth.) J.T.Pereira
Ridsdalea kampucheana (Tirveng.) J.T.Pereira
Ridsdalea kassamensis J.T.Pereira
Ridsdalea lagunensis (Merr.) J.T.Pereira
Ridsdalea leytensis (J.T.Pereira & Ridsdale) J.T.Pereira
Ridsdalea macromera (Lauterb. & K.Schum.) J.T.Pereira
Ridsdalea merrillii (Elmer) J.T.Pereira
Ridsdalea negrosensis (Merr.) J.T.Pereira
Ridsdalea nigrescens (Valeton) J.T.Pereira
Ridsdalea papuana J.T.Pereira
Ridsdalea pseudoternifolia (Valeton) J.T.Pereira
Ridsdalea puffiana J.T.Pereira
Ridsdalea pulcherrima (Kurz) J.T.Pereira
Ridsdalea schoemannii (Teijsm. & Binn.) J.T.Pereira
Ridsdalea sootepensis (Craib) J.T.Pereira
Ridsdalea sundaensis J.T.Pereira
Ridsdalea thailandica (Tirveng.) J.T.Pereira
Ridsdalea uranthera (C.E.C.Fisch.) K.M.Wong
Ridsdalea uvarioides (Valeton) J.T.Pereira
Ridsdalea venalis (Bremek.) J.T.Pereira
Ridsdalea vidalii (Bremek.) J.T.Pereira
Ridsdalea vietnamensis (Tirveng.) J.T.Pereira
Ridsdalea wittii (Craib) J.T.Pereira


Pereira JT, Wong KM (2016) Sandakania 21: 42.
IPNI - Rubiaceae: Ridsdalea J.T.Pereira & K.M.Wong
POWO: Ridsdalea JT Pereira & KM Wong (retrieved 24 July 2019)

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