Global Regional Plant Guides

Pacific Islands Tropical Littoral & Volcanic Forest Plant Survival Guide

A comprehensive survival plant guide for Pacific Islands Tropical Littoral & Volcanic Forest, covering useful woody materials, land foods, aquatic foods, traditional-use plants and poisonous look-alikes.

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Cover of Pacific Islands Tropical Littoral & Volcanic Forest Plant Survival Guide

Continent: Oceania
USDA-equivalent zones: 11-13
Köppen climate: Af / Am
Profiles: 20
Regional biome: Littoral forest, volcanic upland, freshwater wetland and reef coast

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Useful plants · 5 Land edibles · 5 Aquatic edibles · 3 Traditional-use · 3 Poisonous look-alikes · 4

Useful plants

Wood, fibre, shelter and craft

Coconut palm

Cocos nucifera

Useful plants

Identify: Tall often leaning palm; pinnate leaves; large fibrous coconuts with three eyes.
Habitat: Tropical coasts and islands, usually near human settlement.
Season: Fruit year-round in warm climates.
Field use: Water and meat from intact mature fruit are food; husk coir makes cordage and tinder; shell makes bowls; fronds provide thatch and basketry.
Caution: Falling coconuts kill. Sour, cracked or contaminated nuts are unsafe. Trees often belong to someone.
Look-alikes: Other palms have smaller fruit and no thick coir husk.

food waterfood fruitcordagetindercontainerthatch

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Pacific pandanus

Pandanus tectorius

Useful plants

Stylized form diagram for Pacific pandanus

Identify: Prop-rooted tree with spiral saw-edged leaves and large segmented orange-red fruit heads.
Habitat: Pacific island littoral forest, atolls and volcanic coasts.
Season: Fruit seasonal; leaves year-round.
Field use: Prepared fruit keys are documented food; leaves are premier material for mats, baskets, cordage, roofing and sails.
Caution: Processing varies by island and cultivar. Leaf edges cut deeply; respect ownership.
Look-alikes: Pineapple lacks prop roots and a woody branching trunk.

food fruitbasketrycordagethatch

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Sea hibiscus

Talipariti tiliaceum

Useful plants

Identify: Heart-shaped leaves pale beneath; yellow hibiscus flowers turning orange-red; fibrous bark.
Habitat: Tropical Pacific and Indian Ocean beaches, estuaries and lowland forest.
Season: Bark and wood year-round; flowers seasonal.
Field use: Inner bark yields excellent cordage; light flexible wood makes floats, outriggers, bow-drill boards and firewood.
Caution: Do not girdle living trees. Wet coastal wood needs drying.
Look-alikes: Portia tree has rounder glossy leaves and persistent brown capsules.

cordagefloatbow drill boardfuel

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Portia tree

Thespesia populnea

Useful plants

Identify: Glossy heart-shaped leaves; yellow-purple hibiscus flowers; round persistent capsules.
Habitat: Tropical littoral forest and village coasts.
Season: Wood year-round; flowers and fruit seasonal.
Field use: Dense durable wood for bowls, paddles, tools and small bows; bark fiber has cordage use.
Caution: Seeds and sap are not casual foods; ownership and cultural uses matter.
Look-alikes: Sea hibiscus has paler leaf undersides and fibrous lighter wood.

bow woodtoolspaddlecordage

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She-oaks / casuarinas

Casuarina / Allocasuarina spp.

Useful plants

Stylized form diagram for She-oaks / casuarinas

Identify: Fine jointed needle-like branchlets; tiny scale leaves at joints; woody cone-like fruits; furrowed bark.
Habitat: Australian coast, woodland, riverbanks and Pacific shores.
Season: Wood year-round; seeds seasonal.
Field use: Dense wood for spear shafts, clubs, handles, bows and excellent coals; fine dry branchlets are tinder.
Caution: Heavy limbs fall in wind. Do not confuse branchlets with edible Ephedra.
Look-alikes: Tamarisk has finer feathery twigs and pink flowers, not woody cones.

bow woodspearhandlesfueltinder

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Land edibles

Terrestrial food species

Breadfruit

Artocarpus altilis

Land-based edible plants

Identify: Large deeply lobed glossy leaves; milky sap; round green bumpy multiple fruits.
Habitat: Pacific and Southeast Asian humid tropics, usually cultivated or naturalized.
Season: Fruit seasonal; wood year-round.
Field use: Mature fruit is a major documented starch after cooking; latex seals containers; light wood makes canoe parts and boards.
Caution: Raw fruit and latex irritate; ownership and cultivar maturity matter.
Look-alikes: Jackfruit has larger spiny fruit directly on trunk and less deeply lobed leaves.

food starchsealantconstruction

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Noni

Morinda citrifolia

Land-based edible plants

Identify: Opposite large glossy leaves; small white tubular flowers fused into a lumpy pale fruit with strong odor.
Habitat: Pacific and Southeast Asian coasts, disturbed forest and limestone soils.
Season: Fruit year-round in warm climates.
Field use: Ripe fruit has documented famine-food and traditional use; wood and bark have dye and tool uses.
Caution: Strong odor does not prove safety; large or medicinal amounts can affect liver, kidneys or medications.
Look-alikes: Other Morinda species differ in fruit size and habitat.

food fruitdyemedicine

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Tropical almond

Terminalia catappa

Land-based edible plants

Stylized form diagram for Tropical almond

Identify: Tiered horizontal branches; large obovate leaves turning red; flattened oval fruits with edible kernel.
Habitat: Tropical coasts and island settlements.
Season: Fruit seasonal; wood year-round.
Field use: Kernels are documented food; leaves make wrapping and shade; wood serves paddles, tools and fuel.
Caution: Hard shells require safe cracking; trees may be owned. Fruit flesh varies.
Look-alikes: Sea mango has narrower glossy leaves and poisonous fruit.

food nutleaf wrappaddlefuel

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Bananas and plantains

Musa spp.

Land-based edible plants

Stylized form diagram for Bananas and plantains

Identify: Large paddle leaves from layered leaf bases forming a pseudostem; hanging flower and fruit cluster.
Habitat: Tropical forest gaps, river valleys and old cultivation.
Season: Fruit and shoots year-round where warm.
Field use: Ripe fruit and cooked green fruit of known cultivars are food; leaves wrap food and shed rain; pseudostem fibers make cordage and tinder.
Caution: Wild bananas may contain many hard seeds. Sap stains and plantations are owned.
Look-alikes: Heliconia has smaller fruits and different flower bracts.

food fruitleaf wrapcordagetinder

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Papaya

Carica papaya

Land-based edible plants

Identify: Soft unbranched hollow trunk; crown of deeply lobed leaves; large fruits attached near the trunk.
Habitat: Tropical clearings, river terraces and abandoned cultivation.
Season: Fruit year-round in warm climates.
Field use: Fully ripe fruit is documented food; black seeds are peppery but used sparingly. Green fruit is cooked in established cuisines.
Caution: Milky latex can irritate skin and may affect pregnancy or medications. Avoid wild fruit contaminated by animals.
Look-alikes: Cecropia has woody branching stems and finger-like fruits.

food fruitfood green

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Aquatic edibles

Water-margin food species

Nipa palm

Nypa fruticans

Water and wetland edible plants

Identify: Huge pinnate leaves arise directly from mud; round brown fruit head; trunk remains underground.
Habitat: Southeast Asian and Pacific mangrove estuaries.
Season: Sap and fruit seasonal; leaves year-round.
Field use: Young seed endosperm and processed sap are documented foods; leaves provide excellent thatch and basket material.
Caution: Tidal mud, crocodiles and contaminated estuaries are major hazards. Fermenting sap requires hygiene and ownership rights.
Look-alikes: No other mangrove palm has the same ground-level leaf crown and round fruit head.

food seedfood sapthatchbasketry

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Sea grapes

Caulerpa racemosa / C. lentillifera

Water and wetland edible plants

Identify: Bright green creeping seaweed with bead-like branchlets or tiny grape clusters.
Habitat: Warm shallow marine flats, lagoons and reef edges.
Season: Year-round in warm seas.
Field use: Clean correctly identified sea grapes are documented raw or cooked food in many Pacific and Asian cultures.
Caution: Avoid polluted water, harmful algal blooms and look-alike algae. Rinse with clean seawater, not freshwater, until use.
Look-alikes: Other Caulerpa species vary; some are bitter or invasive.

food marine

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Beach cabbage / sea purslane

Sesuvium portulacastrum

Water and wetland edible plants

Stylized form diagram for Beach cabbage / sea purslane

Identify: Creeping succulent with opposite narrow fleshy leaves and small pink-purple flowers.
Habitat: Tropical sandy and muddy coasts above normal tide.
Season: Year-round in warm climates.
Field use: Tender tips are documented cooked greens in some coastal cultures; stems help stabilize sand.
Caution: Very salty and may concentrate pollution. Avoid sewage and industrial coasts.
Look-alikes: Other iceplants and saltworts differ in flower and leaf arrangement.

food green

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Traditional-use

Documented traditional medicine

Turmeric

Curcuma longa

Medicinal and traditional-use plants

Identify: Large lance leaves from an underground orange rhizome; pale flower spike with colored bracts.
Habitat: South and Southeast Asian cultivation and disturbed humid ground.
Season: Rhizomes late season.
Field use: Known rhizomes are documented spice, dye and traditional-use material.
Caution: Wild ginger relatives can look similar and some are not edible. Concentrated medicinal dosing is not advised.
Look-alikes: Zingiber and Curcuma species differ in flower spike and rhizome color.

seasoningdyemedicine

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Ginger

Zingiber officinale

Medicinal and traditional-use plants

Identify: Narrow leaves on pseudostems; thick aromatic branching rhizome; cone-like flower spike from the ground.
Habitat: Tropical Asian cultivation and moist disturbed ground.
Season: Rhizomes year-round.
Field use: Known rhizomes are documented food, seasoning and traditional-use plant.
Caution: Do not dig unknown ginger-family plants. Large medicinal doses can interact with anticoagulants.
Look-alikes: Wild gingers and turmeric differ in leaf width, scent and flowers.

seasoningmedicine

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Gotu kola

Centella asiatica

Medicinal and traditional-use plants

Identify: Creeping herb with round kidney-shaped leaves on long stalks and tiny clustered flowers at nodes.
Habitat: Tropical wet ground, ditches, rice margins and streambanks.
Season: Year-round in warm climates.
Field use: Leaves are documented food and traditional-use plant, usually cooked or eaten from clean cultivation.
Caution: Wild plants from wet ground may carry parasites or pollutants. Concentrated medicinal use can affect liver and medicines.
Look-alikes: Hydrocotyle pennyworts have similar round leaves and require flower examination.

food greenmedicine

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Poisonous look-alikes

Do not eat — verify before harvest

Fish-poison tree

Barringtonia asiatica

Poisonous plants

Stylized form diagram for Fish-poison tree

Identify: Large glossy leaves clustered at branch ends; showy white-pink brush flowers; large box-like floating fruit.
Habitat: Indo-Pacific beaches and littoral forest.
Season: Year-round leaves; fruit seasonal.
Field use: Wood and buoyant fruit have technical uses; no food use.
Caution: Seeds and bark contain saponins historically used to stun fish and are poisonous to people. Legal and ecological restrictions apply.
Look-alikes: Tropical almond has tiered branches and flatter oval fruit.

poisonfloat

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Cerbera / suicide tree

Cerbera odollam and related spp.

Poisonous plants

Stylized form diagram for Cerbera / suicide tree

Identify: Glossy narrow leaves clustered at twig ends; white five-petaled flowers; mango-like green fruit; milky sap.
Habitat: South and Southeast Asian coasts, mangroves and river edges.
Season: Year-round.
Field use: No food use.
Caution: Seeds contain potent cardiac glycosides and can be fatal; sap is irritating.
Look-alikes: Sea mango relatives and edible mangoes differ but fruit similarity is dangerous.

poison

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Rosary pea

Abrus precatorius

Poisonous plants

Identify: Slender vine with many small paired leaflets, pink pea flowers and pods exposing red-black seeds.
Habitat: Tropical and subtropical thickets and disturbed ground worldwide.
Season: Seeds seasonal.
Field use: No use. Seeds are sometimes used as beads but should not be drilled or handled by children.
Caution: Chewed or damaged seeds contain abrin and can be fatal.
Look-alikes: Other small-seeded legumes lack the distinctive red seed with black spot.

poison

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Cycads called sago palms

Cycas spp.

Poisonous plants

Stylized form diagram for Cycads called sago palms

Identify: Crown of stiff pinnate leaves from a stout trunk; large exposed cones or seeds; no true flowers.
Habitat: Tropical and subtropical Asia and Oceania.
Season: Seeds seasonal; leaves year-round.
Field use: Leaves have limited thatch value, but food use is excluded in this guide.
Caution: Seeds and pith contain cycasin and neurotoxins; traditional detoxification is complex and failure can be fatal.
Look-alikes: True sago palm is a flowering palm with enclosed fruit, not a cycad cone.

poison

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