Hyophorbe is a small genus of five species of palms (family Arecaceae, order Arecales) endemic to the Mascarene Islands in the south-western Indian Ocean — an archipelago encompassing Mauritius, Réunion, and the outer islands of Rodrigues and Île Ronde. The genus is sometimes called the "bottle palm" or "spindle palm" group, names that reflect the two most distinctive trunk shapes found in the genus: H. lagenicaulis, the bottle palm, develops a dramatically swollen, barrel-like base, while H. verschaffeltii, the spindle palm, bears a more elongated fusiform swelling. All five species can reach heights exceeding 6 metres, with a solitary, ringed trunk topped by a crown of pinnate (feather) fronds.
Despite their popularity as ornamental palms in tropical and subtropical gardens worldwide, every species is considered endangered or critically endangered in the wild. Habitat loss and invasive species have devastated the native Mascarene forests where these palms naturally grow. One species, H. amaricaulis, is represented by a single known wild individual on Mauritius, making it one of the rarest plants on Earth. H. indica (palmiste poison) survives on Réunion, H. vaughanii on Mauritius, and H. lagenicaulis is essentially restricted in the wild to the tiny islet of Île Ronde.
The genus belongs to the subfamily Arecoideae within Arecaceae, and its five species represent the entirety of Hyophorbe's known diversity. Their horticultural appeal, driven by the distinctive swollen trunks and tolerance of coastal conditions, has established them as landscape staples in warm climates from Florida to Southeast Asia, even as their native island habitats remain under severe pressure.
Etymology
The name Hyophorbe derives from the Greek words hys (pig) and phorbē (food or fodder), alluding to historical use of the fruits as feed for pigs on the Mascarene Islands.
Distribution
Hyophorbe is endemic to the Mascarene Islands in the Indian Ocean. Individual species occupy different islands: H. lagenicaulis is native to Île Ronde, H. verschaffeltii to Rodrigues Island, H. indica to Réunion, and both H. amaricaulis and H. vaughanii to Mauritius. All five species have been widely introduced as ornamentals in tropical and subtropical regions globally.
Conservation
All five species of Hyophorbe are endangered or critically endangered in their native Mascarene Island habitats, driven by deforestation, agricultural conversion, and invasive species. H. amaricaulis is among the world's rarest palms, with only a single known wild individual surviving on Mauritius. Conservation efforts include ex-situ cultivation in botanic gardens and seed banking programs.
Cultivation
Hyophorbe palms, particularly the bottle palm (H. lagenicaulis) and spindle palm (H. verschaffeltii), are widely cultivated as ornamentals in tropical and subtropical gardens. They are valued for their distinctive swollen trunks, compact size, and tolerance of coastal, saline, and dry conditions. They prefer full sun, well-drained soils, and are moderately drought-tolerant once established. Propagation is from seed, which can be slow to germinate.
