ramosii Kloppenb. & Siar. Fraterna 20(4) (2007)
recurifolia → carnosa f. Compacta
reticulata Constantin 1912 → multiflora Blume 1826
reticulata Engler 1913 → reticulata Moon 1824
reticulata Merrill 1920 → reticulata Moon 1824
reticulata Moon 1824
reticulata Schlechter 1825 ex Engler 1913 ex Merrill 1920 → chunii Li 1984, chuniana Li
reticulata Schlechter 1908 → reticulata Moon 1824
retusa Dalzell 1852
revolubilis → sp. 'Kunming Kina'
revoluta Wight ex Hooker 1883 → inconspicua, dodecatheiflora, litoralis
rhodostemma Schlechter 1909
ridley King & Gamble 1903 → acuta Haworth 1821
rigida Kerr 1939→ parasitica Wallich ex Wight 1830
rizaliana Kloppenburg 1991 → loheri Kloppenburg 1991
rosarioae→ sp. aff. obscura MPR
rosea Schumann 1905 → inconspicua, litoralis
rotundifolia Siebold 1840 → sp. 'Rectangle leaf', Burma, Hoya cupcakes
rubida Schlechter 1901
rundumensis, 1921 → plicata subsp. rundumensis 39039
rupicola → australis ssp. rupicola
ruscifolia Decne., in DC Prodr. 8 (1844)