# Thatch Screwpine (*pandanus tectorius*) The Thatch Screwpine, Pandanus tectorius, is a culturally and ecologically significant tree native to coastal regions of the tropical Pacific and Indian Oceans. Known for its distinctive stilt roots that resemble miniature wooden teepees and its dramatic spiraling leaf arrangement, this resilient plant thrives in sandy shores and harsh marine winds. Its large, pineapple-like segmented fruits, called keys or drupes, are a vital food source in many Pacific island communities, while its durable, fibrous leaves are traditionally harvested for weaving mats, sails, and thatch roofs. Beyond its human utility, the Thatch Screwpine plays a crucial role in coastal ecosystems, securing loose shorelines against erosion and providing habitat for nesting seabirds and land crabs. Its ability to thrive in poor, saline soils makes it a true survivor of the tropical coastline. - **Category:** [Plants](https://www.snappit.app/explore/categories/plant) - **Rarity:** Common - **Danger:** 1/5 · Very low - **Snaps:** 1 - **Habitat:** Found on sandy beaches, coastal dunes, rocky shores, and the edges of mangrove swamps throughout the tropical Pacific and Indian Ocean regions. ![Thatch Screwpine](https://inaturalist-open-data.s3.amazonaws.com/photos/258505249/medium.jpeg) Photo: Steve Fitzgerald, CC BY-SA 4.0 · [iNaturalist](https://www.inaturalist.org/photos/258505249) ## Appearance This small, branching tree typically reaches heights of 4 to 14 meters. It is easily recognized by its thick, sprawling stilt roots (prop roots) emerging from the lower trunk to anchor it in unstable sand. The long, sword-like leaves are arranged in a tight spiral at the ends of the branches, measuring 1 to 2 meters in length, with sharp, prickly margins. The tree produces large, spherical, or ovoid compound fruits that turn from light green to a vibrant orange or yellow when ripe, resembling woody pineapples. Female trees bear these heavy fruits, while male trees produce large, fragrant, white to yellow clusters of flowers surrounded by pale bracts. ## Taxonomy - **Kingdom:** Plantae - **Phylum:** Tracheophyta - **Class:** Liliopsida - **Order:** Pandanales - **Family:** Pandanaceae - **Genus:** Pandanus ## Interesting facts - Despite its name and the appearance of its fruit, the Thatch Screwpine is not related to pineapples; it gets its name from the spiral arrangement of its leaves. - In traditional Pacific cultures, the fragrant male flowers, known as hinano, are used to scent coconut oil and create elaborate festive leis. - Individual fruit segments, called drupes or keys, can float in seawater for up to several months while remaining viable for germination. - The tough leaves are soaked, beaten, and scraped to remove spines before being woven into sails that historically powered Polynesian voyaging canoes. ## Special abilities - **Prop-Root Stabilization:** The plant develops extensive stilt roots that anchor the trunk securely into unstable sandy soils, allowing it to withstand high winds and coastal storms. - **Salt and Wind Resistance:** It possesses thick, waxy, fibrous leaves that minimize water loss and protect the plant from harsh salt spray and intense tropical sunlight. - **Buoyant Fruit Dispersion:** It produces woody, fibrous fruit segments containing air cavities that allow them to float across ocean currents for months to colonize new shores. ## Measurements & details - **Length:** 400-1400 cm - **Lifespan:** 50-80 years ## Diet & Feeding As a photoautotrophic plant, the Thatch Screwpine produces its own organic nutrients through photosynthesis using sunlight, carbon dioxide, and water absorbed from the soil. - **Primary Foods:** Sunlight, Water, Carbon dioxide, Soil nutrients ## Ecological connections - **Eaten by:** Strawberry Hermit Crab (*Coenobita perlatus*) — Hermit crabs seek shelter under the fallen leaves and feed on the decomposing fruit keys of the tree. - **Mutualism:** Samoan Flying Fox (*Pteropus samoensis*) — Pacific flying foxes feed on the ripe, sweet orange pulp of the fruit, acting as seed dispersers. - **Host plant:** Banana Skipper (*Erionota thrax*) — The caterpillars of this butterfly feed extensively on the tough, spiny leaves of the screwpine. ## Safety **Danger:** 1/5 · Very low No special safety notes yet. ## Frequently Asked Questions ### How to identify Thatch Screwpine? Start with the whole plant, then compare leaf arrangement, leaf edges, stems and any flowers or fruit. Opposite leaves grow in pairs; alternate leaves come one at a time along the stem. These details tell you far more together than a single green leaf does. Plant Identifier: upload a photo and compare the visible details. ### How long is Thatch Screwpine? 400-1400 cm ### How long does Thatch Screwpine live? 50-80 years ### What does Thatch Screwpine eat? As a photoautotrophic plant, the Thatch Screwpine produces its own organic nutrients through photosynthesis using sunlight, carbon dioxide, and water absorbed from the soil. ### Where is Thatch Screwpine usually found? Found on sandy beaches, coastal dunes, rocky shores, and the edges of mangrove swamps throughout the tropical Pacific and Indian Ocean regions. ## Where to spot - [Kahanu Garden](https://www.snappit.app/guides/places/kahanu-garden) — Hawaii, US · Botanical Garden - [Ke'anae Arboretum](https://www.snappit.app/guides/places/keanae-arboretum) — Hawaii, US · Botanical Garden - [Limahuli Garden and Preserve](https://www.snappit.app/guides/places/limahuli-garden-and-preserve) — Hawaii, US · Botanical Garden [View all places to see Thatch Screwpine](https://www.snappit.app/guides/where-to-see/thatch-screwpine) ## More Plants - [white snakeroot](https://www.snappit.app/explore/white-snakeroot) (*Ageratina altissima*) - [tree-of-heaven](https://www.snappit.app/explore/tree-of-heaven) (*Ailanthus altissima*) - [western sword fern](https://www.snappit.app/explore/western-sword-fern) (*Polystichum munitum*) - [common milkweed](https://www.snappit.app/explore/common-milkweed) (*Asclepias syriaca*) --- Source: [Thatch Screwpine: Facts & Places to See — Snappit](https://www.snappit.app/explore/thatch-screwpine)