The town of Denham, Western Australia named is after him, as is the New Caledonian endemic tree Meryta denhamii.
denhamii owes its discovery to Scots William Grant Milne (?-1866), a gardener at the Edinburgh Botanic Garden, who joined the HMS Herald expedition to the south-western Pacific (1852-1856) as a botanist.
Milne, the discoverer of several plants, including the rare New Caledonian tree Meryta denhamii which he found growing on the Isle of Pines in 1853 and sent to the Royal Botanical Gardens in Kew, had botanist Berthold Carl Seemann name the plant Meryta denhamii after Captain Denham (for whom the town of Denham, Western Australia was also named).
Meryta denhamii | ''Meryta denhamii | Foliage of ''Meryta denhamii |