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Pandanus
Pandanus utilis fruit.JPG
Fruit of Pandanus utilis
Scientific classification e
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Pandanales
Family: Pandanaceae
Genus: Pandanus
Parkinson
Species

See List of Pandanus species

Synonyms
  • Keura Forssk.
  • Athrodactylis J.R.Forst. & G.Forst.
  • Pandanus Rumph. ex L.f. (1782) not Parkinson (1773)
  • Dorystigma Gaudich.
  • Eydouxia Gaudich.
  • Fisquetia Gaudich.
  • Foullioya Gaudich.
  • Heterostigma Gaudich.
  • Hombronia Gaudich.
  • Jeanneretia Gaudich.
  • Roussinia Gaudich.
  • Souleyetia Gaudich.
  • Sussea Gaudich.
  • Tuckeya Gaudich.
  • Vinsonia Gaudich.
  • Marquartia Hassk.
  • Hasskarlia Walp. (1849) not Meisn. (1840) nor Baill. (1860)
  • Barrotia Gaudich.
  • Bryantia Webb ex Gaudich.
  • Doornia de Vries
  • Rykia de Vriese

Pandanus is a genus of monocots with some 750 accepted species. They are palm-like, dioecious trees and shrubs native to the Old World tropics and subtropics. The greatest number of species are found in Madagascar and Malesia. Common names include pandan, screw palm, and screw pine. They are classified in the order Pandanales, family Pandanaceae.

Description

Pandanus sp.2
Aerial, prop roots

Often called pandanus palms, these plants are not closely related to palm trees. The species vary in size from small shrubs less than 1 m (3.3 ft) tall, to medium-sized trees 20 m (66 ft) tall, typically with a broad canopy, heavy fruit, and moderate growth rate. The trunk is stout, wide-branching, and ringed with many leaf scars. Mature plants can have branches. Depending on the species, the trunk can be smooth, rough, or warty. The roots form a pyramidal tract to hold the trunk. They commonly have many thick stilt roots near the base, which provide support as the tree grows top-heavy with leaves, fruit, and branches. These roots are adventitious and often branched. The top of the plant has one or more crowns of strap-shaped leaves that may be spiny, varying between species from 30 cm (12 in) to 2 m (6.6 ft) or longer, and from 1.5 cm (0.59 in) up to 10 cm (3.9 in) broad.

They are dioecious, with male and female flowers produced on different plants. The flowers of the male tree are 2–3 cm (0.79–1.18 in) long and fragrant, surrounded by narrow, white bracts. The female tree produces flowers with round fruits that are also bract-surrounded. The individual fruit is a drupe, and these merge to varying degrees forming multiple fruit, a globule structure, 10–20 cm (3.9–7.9 in) in diameter and have many prism-like sections, resembling the fruit of the pineapple. Typically, the fruit changes from green to bright orange or red as it matures. The fruits can stay on the tree for more than 12 months.

Ecology

These plants grow from sea level to 3,300 m (10,800 ft). Pandanus trees are of cultural, health, and economic importance in the Pacific, second only to the coconut on atolls. They grow wild mainly in semi-natural vegetation in littoral habitats throughout the tropical and subtropical Pacific, where they can withstand drought, strong winds, and salt spray. They propagate readily from seed, but popular cultivars are also widely propagated from branch cuttings by local people.

Species growing on exposed coastal headlands and along beaches have thick 'stilt roots' as anchors in the loose sand. Those stilt roots emerge from the stem, usually close to but above the ground, which helps to keep the plants upright and secure them to the ground.

While pandanus are distributed throughout the tropical and subtropical islands and coastlines of the Atlantic, Indian and Pacific Oceans, they are most numerous on the low islands and barren atolls of Polynesia and Micronesia. Other species are adapted to mountain habitats and riverine forests.

The tree is grown and propagated from shoots that form spontaneously in the axils of lower leaves. Pandanus fruits are eaten by animals including bats, rats, crabs, and elephants, but the vast majority of species are dispersed primarily by water. Its fruit can float and spread to other islands without help from humans.

Cultivation and uses

Pandanus has multiple uses, which is dependent in part on each type and location. Some Pandanus are a source of food while others provide raw material for clothing, basket weaving and shelter.

Südseeabteilung in Ethnological Museum Berlin 134
Crab claw sail woven from pandan leaves on a tepukei, an ocean-going outrigger canoe from Temotu, Solomon Islands
Kinab-anan Farm basket
A bayong, a traditional Philippine basket woven from leaves of karagumoy (Pandanus simplex) in the hexagonal kinab-anan pattern

Pandanus leaves are used for handicrafts. Artisans collect the leaves from plants in the wild, cutting only mature leaves so that the plant will naturally regenerate. The leaves are sliced into fine strips and sorted for further processing. Weavers produce basic pandan mats of standard size or roll the leaves into pandan ropes for other designs. This is followed by a coloring process, in which pandan mats are placed in drums with water-based colors. After drying, the colored mats are shaped into final products, such as placemats or jewelry boxes. Final color touch-ups may be applied.

Sifon pandan
Pandan cake flavoured with pandan leaf extract

Pandan leaves from Pandanus amaryllifolius are used widely in Southeast Asian and South Asian cuisines to add a distinct aroma to various dishes and to complement flavors like chocolate. Because of their similarity in usage, pandan leaves are sometimes referred to as the "vanilla of Asia." Fresh leaves are typically torn into strips, tied in a knot to facilitate removal, placed in the cooking liquid, then removed at the end of cooking. Dried leaves and bottled extract may be bought in some places. Finely sliced pandan leaves are used as fragrant confetti for Malay weddings, graves etc.

Sama woman making a traditional mat
A Sama woman making a traditional mat (tepoh) from pandan leaves in Semporna, Sabah, Malaysia

Pandan leaves are known as daun pandan in Indonesian and Malay; dahon ng pandan (lit. "pandan leaf") or simply pandan in Filipino; 斑蘭 (bān lán) in Mandarin; as ใบเตย (bai toei;) in Thai, lá dứa in Vietnamese; pulao pata in Bengali; and rampe in Sinhalese and Hindi.

In Sri Lanka, pandan leaves are used heavily in both vegetable and meat dishes, and are often grown in homes. It is common practice to add a few pieces of pandan leaf when cooking red or white rice as well.

In Southeast Asia, pandan leaves are mainly used in sweets such as coconut jam and pandan cake. In Indonesia and Malaysia, pandan is also added to rice and curry dishes such as nasi lemak. In the Philippines, pandan leaves are commonly paired with coconut meat (a combination referred to as buko pandan) in various desserts and drinks like maja blanca and gulaman.

In Indian cooking, the leaf is added whole to biryani, a kind of rice pilaf, made with ordinary rice (as opposed to that made with the premium-grade basmati rice). The basis for this use is that both basmati and pandan leaf contains the same aromatic flavoring ingredient, 2-acetyl-1-pyrroline. In Sri Lanka, pandan leaves are a major ingredient used in the country's cuisine.

Kewra (also spelled Kevda or Kevada) is an extract distilled from the pandan flower, used to flavor drinks and desserts in Indian cuisine. Also, kewra or kevada is used in religious worship, and the leaves are used to make hair ornaments worn for their fragrance as well as decorative purpose in western India.

Species with large and medium fruit are edible, notably the many cultivated forms of P. tectorius (P. pulposus) and P. utilis. The fruit is eaten raw or cooked. Small-fruited pandanus may be bitter and astringent.

Karuka nuts (P. julianettii) are an important staple food in New Guinea. Over 45 cultivated varieties are known. Entire households will move, and in some areas will speak a pandanus language at harvest time. The taste is like coconut or walnuts.

Throughout Oceania, almost every part of the plant is used, with various species different from those used in Southeast Asian cooking. Pandanus trees provide materials for housing; clothing and textiles including the manufacture of dilly bags (carrying bags), fine mats or [[ʻie toga]]; sails, food, medication, decorations, fishing, and religious uses.

Selected species

Pandanus simplex is karagumoy
Pandanus simplex

Note: several species previously placed in Pandanus subgenus Acrostigma are now in the distinct genus Benstonea.

  • Pandanus aldabraensis H.St.John
  • Pandanus amaryllifolius Roxb. ex Lindl. – pandan
  • Pandanus balfourii Martelli
  • Pandanus barkleyi Balf.f.
  • Pandanus boninensis Warb.
  • Pandanus candelabrum P.Beauv.
  • Pandanus carmichaelii R.E.Vaughan & Wiehe
  • Pandanus ceylanicus Solms
  • Pandanus christmatensis Martelli
  • Pandanus clandestinus Stone
  • Pandanus conglomeratus Balf.f.
  • Pandanus conoideus Lam.
  • Pandanus decastigma B.C.Stone
  • Pandanus decipiens Martelli
  • Pandanus decumbens Solms
  • Pandanus drupaceus Thouars
  • Pandanus elatus Ridl.
  • Pandanus eydouxia Balf.f.
  • Pandanus fanningensis H.St.John
  • Pandanus forsteri C.Moore & F.Muell.
  • Pandanus furcatus Roxb.
  • Pandanus gabonensis Huynh
  • Pandanus glaucocephalus R.E.Vaughan & Wiehe
  • Pandanus halleorum B.C.Stone
  • Pandanus heterocarpus Balf.f.
  • Pandanus iceryi Horne ex Balf.f.
  • Pandanus incertus R.E.Vaughan & Wiehe
  • Pandanus joskei Horne ex Balf.f.
  • Pandanus julianettii Martelli - karuka
  • Pandanus kaida Kurz
  • Pandanus kajui Beentje
  • Pandanus lacuum H.St.John ex B.C.Stone
  • Pandanus laxespicatus Martelli
  • Pandanus livingstonianus Rendle - Tropical Africa
  • Pandanus microcarpus Balf.f.
  • Pandanus montanus Bory
  • Pandanus multispicatus Balf.f.
  • Pandanus odorifer (Forssk.) Kuntze
  • Pandanus palustris Thouars
  • Pandanus parvicentralis Huynh
  • Pandanus prostratus Balf.f.
  • Pandanus pyramidalis Barkly ex Balf.f.
  • Pandanus rigidifolius R.E.Vaughan & Wiehe
  • Pandanus sechellarum Balf.f.
  • Pandanus spathulatus Martelli
  • Pandanus spiralis R.Br. – Australian screwpine
  • Pandanus tectorius Parkinson ex Du Roi – thatch screwpine
  • Pandanus tenuifolius Balf f.
  • Pandanus teuszii Warb.
  • Pandanus thomensis Henriq.
  • Pandanus tonkinensis B.C.Stone
  • Pandanus utilis Bory – common screwpine
  • Pandanus vandermeeschii Balf.f.
  • Pandanus verecundus Stone
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