Pandanus columnaris

Pandanus columnaris is a dioecious tree in the family Pandanaceae,[3] endemic to Madagascar. The specific epithet, "columnaris", refers to the columnar shape of the crown of the tree.[4]

Pandanus columnaris
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Pandanales
Family: Pandanaceae
Genus: Pandanus
Section: Pandanus sect. Acanthostyla
Species:
P. columnaris
Binomial name
Pandanus columnaris

Description

Pandanus columnaris is a columnar tree, up to 20 m (66 ft) tall, with light brown bark and a spiny trunk up to 25 cm (9.8 in) in diameter. The crown of the tree is cylindric, with spirals of large leaves at the top and with short secondary branchlets below. The terminal leaves may be more than 2 m (6 ft 7 in) long and 24 cm (9.4 in) wide near the base. The lateral branchlets are 2–2.5 cm (0.79–0.98 in) in diameter and spiny, with leaves that are shorter and narrower – up to 1.2 m (3 ft 11 in) long and 22 mm (0.87 in) wide – than the terminal leaves. Unlike many species of pandanus, P. columnaris has few to no prop roots.[4]

Flowers and fruit

On male trees, the flowers are made up of yellow spikes and form on the lateral branchlets. Styles and stigmas of female flowers are both 7 mm (0.28 in) long. Fruits (drupes) are 20–22 mm (0.79–0.87 in) long, 10–15 mm (0.39–0.59 in) wide and broadly egg-shaped.[4]

Distribution and habitat

The trees are infrequent in coastal forests. The species was first described in 1961, found along the east coast of Madagascar, in the Antalaha area.[4]

Taxonomy

Pandanus columnaris is a member of the section Acanthostyla. Its closest relative is P. mangokensis Martelli.[4]

References
  1. Manjato, N. (2020). "Pandanus columnaris". IUCN Red List of Threatened Species. 2020: e.T139684898A139685016. doi:10.2305/IUCN.UK.2020-1.RLTS.T139684898A139685016.en. Retrieved 6 May 2023.
  2. "Pandanus columnaris H.St.John". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 6 May 2023.
  3. "Pandanus columnaris H.St.John". www.gbif.org. GBIF. Retrieved 2020-12-27.
  4. St. John, Harold. Revision of the Genus Pandanus Stickman, Part 27 Pandanus Novelties from Madagascar. Pacific Science, Vol. XXII, January 1968
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