Rupicola

Rupicola is a small genus of flowering plants in the family Ericaceae. The species are endemic to New South Wales in Australia.
In 2015 it was found that genus "Epacris" is paraphyletic to "Rupicola" and "Budawangia", and proposed to merge species into "Epacris".
The species are heaths of limited distributions, found in cliff habitats in the Blue Mountains of New South Wales. Their growth habits vary from decumbent or pendulous to more erect. Their flowers are white with short tubes and five lobes, and are, like in other Epacrids, carried singly in leaf axils near the ends of the stems. 
Etymology.
The name "Rupicola" is formed from ""rupes-is", a cliff, and "cola", an inhabitant".
Taxonomy and systematics.
"Rupicola" was established as a monotypic genus by Joseph Maiden and Ernst Betche in 1898 containing the single species "Rupicola sprengelioides". Though it has some features in common with "Prionotes" and "Sprengelia", they noted that the new species "strikingly resembles the Tasmanian "Epacris mucronulata", R.Br." They placed it adjacent to "Epacris" in tribe Epacrideae, an affinity that was supported by Watson in 1967 and Powell in 1987. 
In 1927, Summerhayes described a second species "Rupicola gnidioides". 
Ian Telford in 1992 revised the genus. He removed "R. gnidioides" to a new genus "Budawangia". Two new species were described – "Rupicola ciliata" and "Rupicola decumbens" – plus "Epacris apiculata" was considered to be mis-classified and was moved from "Epacris" to "Rupicola". Members of "Rupicola" were distinguished by having their stamens inserted at the base of the corolla, in contrast to those of "Epacris" and "Budawangia", which have them attached at the mouth of the corolla tube. "Budawangia gnidioides" has hypogynous swellings which "appear to have no nectary function", and "Rupicola" species have no nectary structures. In "Epacris" the species generally have well-developed nectary scales. In Rupicola, the anthers open with a short apical slit, unlike most members of Epacridoideae which form a full-length slit. In other subfamilies the anthers open with a short slit or a pore.
In the latter 1990s, Crayn et al. compared sequences for the plastid gene "rbc"L and suggested that "Epacris" may be paraphyletic to "Rupicola" and "Budawangia". In 2015, Quinn et al. studied 45 morphological characteristics along with genetic indels from the plastid "atp"B–"rbc"L non-coding region. They found that the two smaller genera together formed a group within "Epacris", and that although there were discernible clades in "Epacris", none were "readily recognisable on morphological features", hence there was no cause to split it into smaller genera along cladistic lines. The authors point out that in the Ericaceae family more widely, stamen filaments attached to the corolla tube have arisen independently multiple times, that attachment may be weak, and that reversion to the original plesiomorphic state is not uncommon. In their analyses, the "Rupicola"–"Budawangia" group was related to "E. calvertiana", "E. coriacea", "E. gunnii", "E. microphylla", and "E. purpurascens". 
They proposed moving all five species into "Epacris". The epithet "ciliata" is already occupied by "Epacris ciliata" , so a new name for "Rupicola ciliata" was given: "Epacris pilosa" . For the three other species which had not previously been members of "Epacris", new combinations were proposed with co-author Elizabeth Anne Brown as the taxonomic authority. 
Thus the concepts for "Rupicola" have been:
References.
Further references not sighted: