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AUSTRALASIAN Tropical & Subtropical Moist Broadleaf Forest

The plants of the rainforest in tropical Australia, New Guinea and the surrounding islands...

Kingdom Plantae

Class Polypodiopsida: Ferns

(Lamington National Park, Queensland)

Aspelnium nidus, 'Bird's Nest Fern'. Grows on trees as an epiphyte, also often found growing on rocks.

Order Laurales
Family Hernandiaceae
Family Lauraceae
Order Magnoliales
Family Myristicaceae
Family Eupomatiaceae
Order Piperales
Family Piperaceae 
Order Arecales

Family Arecaceae: Palms

(Raja Ampat, Papua New Guinea)

Ptychosperma macarthurii, 'Macarthur Palm'. Found in rainforest in pockets of N.T, and New Guinea and south-west Pacific islands.

Order Asparagales

Families Amaryllidaceae

This group contains a range of ornamental plants, such as the various daffodils, and the ‘crinum lilies’ (the ‘true lilies’ are in a different order). It includes several species that provide vegetables and flavours, such as chives, leek and onion.

Crinum pedunculatum , ‘Crinum Lily’, ‘Mangrove Lily’. Short shrub. Large, long leaves with longitudinal veins. These clasp around a short stalk. Produces a stalk with an umbel of many white, spider-like flowers, giving rise to other common name of ‘spider lily’. Fruits are unusual, almost onion like; green and round, with elongated pipes at end. These split to drop angular semi-circular seeds that are a green- tinged white with an almost styrofoam like surface. They are ocean dispersed, and thus sometimes seen washed up on tropical beaches. Indigenous uses include the crushed up plant used to alleviate box jellyfish stings, and fibrous parts of plant trailed behind moving boat as a lure to catch fish such as mackerel. Usually found only at sea level, and in wet forest, on edge of mangroves, and behind beaches along subtropical and tropical east coast of Australia, across the top to the NT, to New Guinea and other tropical Pacific Islands.

Family Orchidaceae

 (Rajah Ampat, Indonesia).

Spathoglottis (Rajah Ampat, Indonesia).

 (Rajah Ampat, Indonesia).

Orde Liliales

Family Smilacaceae

There are at least 300 species in this family, and they are found throughout the tropics of the world, as well as in many temperate areas. 

Smilax spp.

In Australia, they are sometimes more obvious in subtropical forests, but there are a couple of species that can be found along the wetter tropical coasts. They can grow as vigorous climbers, with the wiry, curling tendrils growing in pairs from the petiole at the base of the leaves. Their leaves are easy to recognize, as they usually have 3 to 5 prominent veins. The fruits grow in umbels  They can be annoying plants because the main stems are covered in small prickles. Several smilax vines provide the original Sarsaparilla

(Cape Tribulation beach)

Order Pandanales
Family Pandanaceae
Order Poales
Family Flaggellariaceae
Family Poaceae
Order Zingiberales
Family Costaceae
Family Zingiberaceae

Order Proteales

Family Protecaceae

Mostly a family of plants found growing in sandy soil heathlands in southern Africa and south-west Australia, but with some interesting species in the rainforest along the east coast of Australia, including some of the dominant canopy trees.

Alloxylon spp. 'Waratah Trees'

There are four species in this genus, found in rainforest along the east coast of Australia and north into New Guinea.

Waratah Tree (image by Damon Ramsey)(near O'Reilly's, Green Mountains, Lamington National Park, Australia)

Alloxylon pinnatum, 'Dorrigo Waratah Tree'. Found in subtropical rainforest in south-east Queensland.

Stenocarpus spp.

A genus of mostly trees and tall shrubs. Some 10 species are found in the subtropical forests along the east coast of Australia. but more are found and endemic to New Caledonia.

Firewheel Tree flowers (image by Damon Ramsey)(in garden, Kings Park, Australia)

Stenocarpus sinuatus, 'Firewheel Tree' . Popular garden tree. Found in subtropical rainforest from NSW to the Atherton Tablelands in North Queensland.

Order Dilleniales 

Family Dilleniaceae

There are some 60 species of Dillenia found in tropical Asia and the Pacific. The large fruited ‘Elephant Apple’ is cultivated in gardens. There is only 1 species native to Australia.

Dillenia alata ‘Red Beech’. Distinctive flaky red bark, large yellow flowers, and red fruits that open up like a flower to reveal the seeds. Common in coastal forest in Queensland and NT, and up into New Guinea, including on forest on sandy soils just behind beaches. Obvious at the Cape Tribulation picnic area.

Order Vitales 
Family Vitaceae
Order Fagales 
Family Casuarinaceae

Order Rosales

Family Urticaceae

(Lamington National Park, Australia)

Dendrocnide moroides, 'Stinging Bush', 'Gympie Gympie'. Small hairs on this plant cause extreme pain.

Family Moraceae

Order Celastrales

Family Celastraceae

This family has over 95 genera and over 1350 species. They are found worldwide, but there are many more species in the tropics and subtropics. The flowers are usually small and pale white or green, with 3-5 sepals and petals.

Salacia spp.

There are over hundreds of species in this genus, mostly in the tropics, with 3 species found in the tropical rainforest of North Queensland. The genus name Salicia, refers to the name of the wife of the ocean god Neptune in Roman mythology, part of the name which in turn came from the word for the latin word for salt.

(Cape Tribulation, Australia)

Salacia chinensis, ‘Lolly Berry’. Grows as a vine. Opposite leaves. Named for the red, round fruits that look like lollies, have sweet, edible flesh, which is also sticky, requiring one to suck on the seed. This vine is often found on the edge of forest and mangroves along waterways and beaches, from tropical North Queensland, through the Pacific islands, across south-east Asia and to India.

Order Malpighiales

Family Achariaceae

Three species; with two in Asian rainforest and one in north-east Australia.

Ryparosa kurrangii, (Daintree, Australia).

Family Euphorbiaceae

(Lamington National Park, Australia)

Homalanthus populifolius, 'Bleeding Heart'. Tree or tall shrub. Named for the distinctive bright red heart-shaped leaves that are mixed in with the green leaves.

Order Myrtales

Family Myrtaceae

The family Myrtaceae is arguably the most important on the Australian continent, although they are not as obvious in the rainforests as they are in the adjacent woodlands.

The flowers in the Myrtaceae family are usually quite showy, but not in the usual way; instead of colourful petals, there is instead a seemingly unlimited number of stamens, giving the flower the appearance of a brush.

Botanists often divide the family into two different sub-families. One group are the ‘woody-fruited myrtles’. These are dominant in drier parts of our continent, and include the classic Australian genera such as Eucalyptus and Melaleuca. The other group, the ‘soft-fruited myrtles’ are usually associated with wetter environments and found mainly in the tropical rainforests of the Americas, Australia and parts of Asia and the Pacific. It includes such genera as Syzygium, Acmena and Eugenia, and are commonly known as the ‘Apples’, ‘Satin-ashes’ and ‘Lilly-pillies’ and usually produce fleshy, colourful fruits.

Eucalyptus grandis, 'Flooded Gum', 'Rose Gum'. (Atherton Birdwatching Lodge). Usually very tall and straight, with lots of large strips of peeling bark. Found along the east coast of Australia in wetter habitats, including being one of the few 'gum trees' in or on the edge of the rainforest.

Family Melastomataceae

(Dei Dei Village, Papua New Guinea)

Probably Melastoma malabathricum.

Order Caryophyllales

Family Nepenthaceae

Nepenthes misool sp. 'Misool Pitcher Plant' (Misool, Indonesia)

Family Rubiaceae
Family Loganaceae

Family Solanaceae

Family Bignoniaceae
Family Verbenaceae

Family Araliaceae

A video on how to deal with the dangerous plants of the Australian rainforest... 

Throughout the virus I am working in Australia on and off as local borders close, mostly in the Kimberley with Coral Expeditions (May-September). If you can't go travelling until everything settles down, then until then, here I am doing online guided walks for Noble Caledonia and online lectures for Silversea.