Article · Wikipedia archive · Last revised Aug 6, 2026

Pentastemona

Pentastemona is a genus in the family Stemonaceae, described as a genus in 1982. In 1992, Duyfjes placed the genus in its own family, the Pentastemonaceae, but this is not widely accepted. It is the only monocot genus with pentamerous flower parts.

Last revised
Aug 6, 2026
Read time
≈ 1 min
Length
135 w
Citations
7
Source
Wikipedia ↗
Pentastemona
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Embryophytes
Clade: Tracheophytes
Clade: Spermatophytes
Clade: Angiosperms
Clade: Monocots
Order: Pandanales
Family: Stemonaceae
Genus: Pentastemona
Steenis

Pentastemona is a genus in the family Stemonaceae, described as a genus in 1982.12 In 1992, Duyfjes placed the genus in its own family, the Pentastemonaceae, but this is not widely accepted.34 It is the only monocot genus with pentamerous flower parts (i.e. five petals, five sepals, five stamens and five carpels).1

The entire genus is endemic to the island of Sumatra in Indonesia.5

Species

Two species are accepted:5

  • Pentastemona egregia (Schott) Steenis
  • Pentastemona sumatrana Steenis
References

References

  1. Steenis, Cornelis Gijsbert Gerrit Jan van. 1982. Blumea 28: 158-162
  2. Tropicos, Pentastemona Steenis
  3. Duyfjes-de Wilde, Brigitta Emma Elisabeth. 1992. Blumea 36: 552
  4. Tropicos, Pentastemonaceae Duyfjes
  5. "Plants of the World Online". Plants of the World Online. Retrieved 2025-07-31.