Philadelphus – from the Greek phil-, loving, + adelphos, brother

• traditionally thought to be an honorific for Ptolemy Philadelphus, 309–246 B.C.E., King of Ptolemaic Egypt [see Flora of North America]
• Aristotle gave the name to a tree, now unknown, to commemorate that king [see Pojar and Mackinnon]
• name was applied to this genus by Linneas, with species name applied by Pursh, a German American botanist (1774–1820)

Species:

• Philadelphus lewisii (wild mock-orange)