Global Regional Plant Guides

East Asian Subtropical Evergreen Forest Plant Survival Guide

A comprehensive survival plant guide for East Asian Subtropical Evergreen Forest, covering useful woody materials, land foods, aquatic foods, traditional-use plants and poisonous look-alikes.

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Cover of East Asian Subtropical Evergreen Forest Plant Survival Guide

Continent: Asia
USDA-equivalent zones: 8-11
Köppen climate: Cfa / Cwa
Profiles: 20
Regional biome: Evergreen broadleaf forest, bamboo, tea-country slope and wet valley

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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

Asian bamboos

Bambusa / Dendrocalamus / Phyllostachys spp.

Useful plants

Identify: Hollow or thick-walled segmented culms; branches at nodes; narrow grass leaves.
Habitat: Asian tropical, subtropical and temperate forest, river valleys and disturbed ground.
Season: Culms year-round; shoots rainy or spring season.
Field use: Shelter, containers, bows, arrow shafts, spears, traps, rafts, cordage strips and friction-fire sets; selected young shoots are food after boiling.
Caution: Shoot cyanide varies; never eat raw unknown bamboo shoots. Green culms can split in fire.
Look-alikes: Giant reeds lack woody branched culms.

constructionbow woodarrow shaftcontainerbow drillfood shoot

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Paper mulberry

Broussonetia papyrifera

Useful plants

Stylized form diagram for Paper mulberry

Identify: Variable lobed rough leaves; milky sap; orange-red aggregate female fruits.
Habitat: East and Southeast Asian forest edge, villages and disturbed ground; introduced widely.
Season: Bark and wood year-round; fruit seasonal.
Field use: Inner bark has famous barkcloth, cordage and paper uses; straight shoots make arrow shafts; ripe fruit is edible but fragile.
Caution: Milky sap can irritate and fruit spoils quickly. Trees may be invasive.
Look-alikes: Mulberries have similar fruit but usually less variable leaves and no dense orange hairs.

cordagebarkclotharrow shaftfood fruit

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Teak

Tectona grandis

Useful plants

Identify: Very large opposite rough leaves; small white flower panicles; round fruit in an inflated papery calyx.
Habitat: South and Southeast Asian seasonal forest.
Season: Wood year-round; leaves growing season.
Field use: Durable water-resistant wood for tools, containers, paddles and construction; dry leaves can bulk tinder.
Caution: Dust can cause dermatitis; old planted trees may be owned.
Look-alikes: Gmelina has opposite leaves but different fruit and smoother leaf texture.

constructiontoolscontainertinder

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Banyan and strangler figs

Ficus benghalensis and related spp.

Useful plants

Stylized form diagram for Banyan and strangler figs

Identify: Milky latex; alternate simple leaves; aerial roots from branches; fig fruits with tiny internal flowers.
Habitat: South Asian and tropical forest, village groves and riverbanks.
Season: Fruit varies; roots and fiber year-round.
Field use: Aerial roots and bark fiber provide cordage; dry roots and wood make light friction-fire materials; ripe figs of known species feed people and wildlife.
Caution: Milky latex irritates. Many figs are edible but some are poor; sacred or owned trees must not be damaged.
Look-alikes: Mulberries have external aggregate fruit, not enclosed figs.

cordagebow drill boardfood fruit

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Ashes

Fraxinus spp.

Useful plants

Identify: Opposite branching; compound leaves; one-seeded winged keys in clusters.
Habitat: Temperate hardwood forest, floodplain and woodland edge.
Season: Wood year-round; leaves growing season.
Field use: Elastic, shock-resistant wood for bows, spear shafts, wedges, handles and snowshoe frames.
Caution: Emerald ash borer and conservation rules may restrict cutting. Confirm opposite branching.
Look-alikes: Boxelder has opposite compound leaves but maple-type paired keys.

bow woodarrow shafthandleswedges

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Land edibles

Terrestrial food species

Asian persimmons

Diospyros kaki / D. lotus

Land-based edible plants

Stylized form diagram for Asian persimmons

Identify: Alternate glossy leaves; urn-like flowers; orange to purple fruits with large persistent calyx.
Habitat: East Asian forest edges, valleys and abandoned orchards.
Season: Fruit autumn.
Field use: Fully ripe fruit is documented food; dense wood makes pegs and small tools.
Caution: Unripe fruit is intensely astringent. Cultivated ownership and species matter.
Look-alikes: Date plum and other Diospyros vary in fruit size and color.

food fruitpegstools

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Chinese jujube

Ziziphus jujuba

Land-based edible plants

Stylized form diagram for Chinese jujube

Identify: Zigzag twigs with paired thorns; glossy three-veined leaves; small red-brown drupes.
Habitat: Warm temperate and dry Asian valleys, orchards and scrub.
Season: Fruit late summer-fall.
Field use: Ripe fruit is documented food fresh or dried; hard wood makes handles and pegs.
Caution: Unripe fruit is astringent; ownership and pesticide exposure matter.
Look-alikes: Other Ziziphus species vary in fruit size and thorn form.

food fruithandlespegs

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Asian chestnuts

Castanea mollissima / C. crenata

Land-based edible plants

Stylized form diagram for Asian chestnuts

Identify: Long sharply toothed leaves; nuts enclosed in dense spiny burs.
Habitat: East Asian temperate forest and old cultivation.
Season: Nuts autumn; wood year-round.
Field use: Nuts are high-energy food after roasting; wood makes bows, stakes and fuel.
Caution: Burs are extremely sharp. Moldy nuts are unsafe.
Look-alikes: Horse chestnut has palmately compound leaves and toxic shiny seeds in fewer-spined husks.

food nutbow woodstakesfuel

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Wild onions and garlic

Allium spp.

Land-based edible plants

Stylized form diagram for Wild onions and garlic

Identify: Narrow leaves or hollow stems; spherical flower heads; clear onion or garlic odor in leaf and bulb.
Habitat: Meadows, rocky slopes, open woodland and stream terraces.
Season: Spring through fall.
Field use: Leaves, flowers and bulbs of positively identified Allium are documented food and seasoning.
Caution: Every sampled part must smell of onion, but odor is not the only test. Avoid unknown bulbs.
Look-alikes: Death camas lacks onion odor and can be fatal.

food greenfood bulb

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Common purslane

Portulaca oleracea

Land-based edible plants

Stylized form diagram for Common purslane

Identify: Low reddish succulent stems; smooth fleshy leaves; tiny yellow flowers; clear sap.
Habitat: Disturbed warm ground, gardens, river deposits and camp edges worldwide.
Season: Warm growing season.
Field use: Young leaves and stems are documented food and water-rich greens.
Caution: High oxalate content; avoid large amounts with kidney disease and avoid contaminated ground.
Look-alikes: Spurges often exude milky sap and are unsafe.

food green

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Aquatic edibles

Water-margin food species

Sacred lotus

Nelumbo nucifera

Water and wetland edible plants

Identify: Large circular peltate leaves usually rising above water; large pink-white flowers; showerhead seed pods.
Habitat: Warm Asian lakes, ponds, floodplains and cultivated wetlands.
Season: Rhizomes, seeds and shoots seasonal.
Field use: Rhizomes, seeds and young stems are documented foods after cooking; fibers have craft use.
Caution: Wetland contamination and deep mud are major hazards. Raw parts can carry parasites.
Look-alikes: Water lily leaves have a slit and usually float.

food starchfood seedfiber

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Water chestnut

Eleocharis dulcis

Water and wetland edible plants

Stylized form diagram for Water chestnut

Identify: Leafless-looking round green stems in clumps; small brown spikelets; underground dark corms.
Habitat: Warm freshwater marshes, paddies and pond margins.
Season: Corms late season.
Field use: Clean cooked corms are documented food.
Caution: Raw corms can carry parasites and wetlands may be contaminated. Confirm sedge and corm structure.
Look-alikes: Spike-rush species without large edible corms are common.

food tuber

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Water spinach

Ipomoea aquatica

Water and wetland edible plants

Identify: Hollow creeping stems; arrow to lance leaves; pale morning-glory flowers.
Habitat: Warm freshwater ditches, ponds and slow rivers; native or invasive.
Season: Warm season.
Field use: Tender shoots are a documented cooked green.
Caution: Raw plants can carry parasites and sewage pathogens; avoid polluted water and check invasive-species law.
Look-alikes: Water hemlock has divided leaves and umbels, not morning-glory flowers.

food green

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Traditional-use

Documented traditional medicine

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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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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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

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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Flame lily

Gloriosa superba

Poisonous plants

Identify: Climbing herb with tendril-like leaf tips and red-yellow reflexed flame-shaped flowers; underground tubers.
Habitat: African and Asian tropical grassland, thicket and forest edge.
Season: Wet season.
Field use: No food or medicine use.
Caution: All parts, especially tubers and seeds, contain colchicine-type toxins and can be fatal.
Look-alikes: Edible yams twine differently and have inconspicuous flowers.

poison

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Castor bean

Ricinus communis

Poisonous plants

Identify: Large star-shaped palmately lobed leaves; spiny capsules; glossy mottled seeds.
Habitat: Warm disturbed ground, riverbanks and tropical/subtropical waste areas.
Season: Growing season; seeds seasonal.
Field use: No survival food or medicine use. Oil extraction is industrial, not a field process.
Caution: Chewed seeds can release ricin and cause severe or fatal poisoning.
Look-alikes: Jatropha has similar lobed leaves but different fruit; it is also toxic.

poison

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Daturas / thorn apples

Datura spp.

Poisonous plants

Stylized form diagram for Daturas / thorn apples

Identify: Large foul-smelling leaves; upright trumpet flowers; spiny egg-shaped capsules.
Habitat: Disturbed warm ground, dry riverbeds and fields worldwide.
Season: Summer-fall.
Field use: No use.
Caution: All parts contain dangerous tropane alkaloids causing delirium, overheating, seizures and death.
Look-alikes: Brugmansia has hanging trumpets on woody shrubs and is also toxic.

poison

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