Protea canaliculata, also known as the groove-leaf sugarbush, is a species of flowering shrub of the genus Protea, which is endemic to the Cape Provinces of South Africa. In Afrikaans this species is known by the vernacular name of bergroossuikerbos. Taxonomy The plant was first described as a new species in the botanical magazine The botanist's repository, for new and rare plants started by Henry Cranke Andrews. Issues of this magazine were undated, and the authorship of the species descriptions has long been in doubt. Sources differ on who wrote the text on this species, and when. A contemporary of the time, Richard Anthony Salisbury, enumerating Proteaceae species in the 1809 On the cultivation of the plants belonging to the natural order of Proteeae by Joseph Knight, attributed the authorship of Protea canaliculata to Adrian Hardy Haworth. Salisbury, himself uncredited in the work, moved the species to his new genus Erodendrum, renaming it E. pæoniflorum, and coining the vernacular name 'peony-flowered erodendrum' for it. In the 1810 On the Proteaceae of Jussieu, Robert Brown represents the species as P. canaliculata, and simply attributes the name to "And. Repos.", whilst completely ignoring Salisbury's 1809 work. In later 19th century works, in the 1847 supplement to the Genera plantarum secundum ordines naturales disposita of Antoine Laurent de Jussieu, Stephan Endlicher credited the taxonomic name to "Andrews Bot. Reposit.", citing Brown, and in the Prodromus Systematis Naturalis Regni Vegetabilis of Augustin Pyramus de Candolle, Carl Meissner in 1856 cited the name to "Andr. Bot. repos.". In 1916 James Britten opined that it was Haworth who had written the text, and he ascribes the publication of the issue to no earlier than December 1806. In the 1912 Flora Capensis Haworth is also attributed as the authority for the name. In 1941 Takenoshin Nakai gave the date as 1806. Although he does not date it to day specifically, a species published just before it in the magazine he dates to 1 December 1806, and only five species plates were published in that year. In 1988 Taxonomic Literature ascribes the name to George Jackson, dating the publication to December 1806, along with eight other plates. Description Protea canaliculata is a shrub which can reach up to 1.2 metres in height. The branches are glabrous, red, and are decumbent, somewhat decumbent, or grow upright. The linear, glabrous leaves are long, but only 1.6 to 3.2mm wide, and