Hoya aldrichii, commonly known as Christmas Island waxvine,[1] is a species of flowering plant in the Apocynaceae or dogbane family. It is a vine that is endemic to Christmas Island, an Australian territory in the north-eastern Indian Ocean.
Hoya aldrichii is a tall climber with glabrous stems and pale bark. The leaves are entire, elliptic, rounded at the base with a pointed tip, long and wide, on a petiole long. The flowers are arranged in umbels of 15–30, on a thicked peduncle long, that increases in length each flowering season, each flower on a glabrous pedicel long. The sepals are long and the petals are pink or white with lobes about long. The corona is pink or deep purplish-pink with star-shaped lobes long and about wide. The fruit is a glabrous follicle about long and wide containing oblong seeds about long with a tuft of hairs long on one end.
Hoya aldrichii was first formally described in 1890 by William Hemsley in the Journal of the Linnean Society, Botany.[2] [3] The specific epithet honours Pelham Aldrich, commander of the survey vessel HMS Egeria, which visited Christmas Island in 1887.
This species of Hoya is a common epiphyte in the shrublands of Christmas Island's coastal terraces.