Flowers single, open, to 14 cm wide, bright scarlet with a burgundy eye, prolific. Foliage deep green, serrated.
Introduced to Australia by John Macarthur who cultivated this and other plants on his farm at Camden, NSW. Cuttings were taken from the plant by early nurserymen and given the name of the property. It seems highly likely that this is in fact simply H. rosa-sinensis.
The first recorded hybrid of H. rosa-sinensis is H. rosa-sinensis 'Archeri'. A clergyman a. S. Archer, an amateur grower in Antigua, West Indies, crossed H. 'Camdenii' with H. schizopetalus and sent some of the seedlings to Kew, London where only one of them developed intermediary characters. ['Common Red', 'China Red', 'Java Red', H. javanica, H. sinensis]