Swamp pandan | |
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Scientific classification | |
Kingdom: | Plantae |
Clade: | Tracheophytes |
Clade: | Angiosperms |
Clade: | Monocots |
Order: | Pandanales |
Family: | Pandanaceae |
Genus: | Pandanus |
Species: | P. solms-laubachii |
Binomial name | |
Pandanus solms-laubachii | |
Synonyms [4] | |
Pandanus solms-laubachii, commonly known as the swamp pandan, is a small tree in the family Pandanaceae which occurs in northeastern Queensland and possibly in Papua New Guinea. It is closely related to both Pandanus gemmifer and Pandanus grayorum .
Pandanus solms-laubachii is an evergreen tree usually growing up to about 10 m (33 ft) high, but may reach 20 m (66 ft) on occasions. [5] [6] It has an upright trunk around 15 cm (5.9 in) in diameter and an open, widely branching crown. The trunk has numerous warty nodules, which eventually become appressed vertical rootlets on older parts of the stems and branches. [5] [6]
The leaves are very long and narrow, arranged in tightly clustered spirals at the ends of the branches. They measure up to 2 m (6 ft 7 in) long and 8 cm (3.1 in) wide, with small ascending spines on the leaf margins and smaller spines on the underside of the midrib. [5] [6]
This species is dioecious, meaning that male and female flowers are born on different plants. The inflorescences are terminal and pendant, about 100 cm (39 in) long. [5] [6] Female flowers are grouped into segments known as phalanges, each of which contain 10-15 fused flowers. [5] [6] There may be up to 125 phalanges per inflorescence. [5] [6] The fruit is a syncarp, about 30 by 20 cm (11.8 by 7.9 in), pale orange when ripe with the phalanges conspicuous. At maturity the phalanges are woody and hard. [5] [6]
Pandanus solms-laubachii was first described in 1887 by the Victorian colonial botanist Ferdinand von Mueller, based on material collected by W. Persich from the Endeavour River on Cape York Peninsula. Mueller's paper describing the species, titled Neuer australischer Pandanus, was published in the journal Botanische Zeitung [7]
The species epithet "solms-laubachii" was created by Mueller in honour of the German botanist Hermann zu Solms-Laubach. [6]
The swamp pandan is considered to be endemic to Queensland by both Plants of the World Online and Australian Tropical Rainforest Plants, [4] [5] but the treatment at Flora of Australia states that it is also found in Papua New Guinea. [6] The Australasian Virtual Herbarium has a single record of this species in Papua New Guinea from 1936. [8] In Australia it occurs from the areas around Mapoon and Lockhart River in Cape York Peninsula, spreading southwards along the east coast to Hinchinbrook Island. [5] [6] [8]
Within this range the preferred habitat of the species is lowland swamp forests, although it also occurs in gallery forests, rainforests, vine thickets and woodlands, from near sea level up to 500 m (1,600 ft). [5] [6]
In the lower reaches of the Mulgrave and Russell rivers, it co-occurs with its close relative Pandanus grayorum . [9]
Pandanus solms-laubachii, along with Pandanus tectorius and Benstonea monticola , is a host plant for the peppermint stick insect ( Megacrania batesii ), which shelters in the central hollow of the leaves and feeds on them. [10] Red-tailed black cockatoos ( Calyptorhynchus banksii ) and various native rats are able to gnaw through the hard woody phalanges to access the seeds. [11] The larvae of the banana scab moth ( Nacoleia octasema ) may attack the fruits of this species. [12] [13]
This species is listed by both the Queensland Department of Environment and Science and the International Union for Conservation of Nature (IUCN) as least concern. [1] [2] The IUCN provides the following summary as the justification for the classification: "This tree species has a wide distribution and is not currently experiencing any major threats and no significant future threats have been identified. This species is therefore assessed as Least Concern". [2]
Like many other species of this genus, the swamp pandan has been used historically for a variety of purposes. The long leaves are easily torn into long strips and used for weaving of baskets, bags, mats, sails, etc, [11] and various other parts of the plant are used for medicines. [12]
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 Malaysia. Common names include pandan, screw palm, and screw pine. They are classified in the order Pandanales, family Pandanaceae.
Agathis robusta, commonly known as the Queensland kauri (pine) or smooth-barked kauri, is a coniferous tree in the family Araucariaceae. Although sometimes called a pine it is not a true pine, having leaves rather than needles. It has a disjunct distribution, occurring in Papua New Guinea and Queensland, Australia. Populations in Papua New Guinea may be treated as the distinct species Agathis spathulata.
Athertonia is a monotypic genus of plants in the family Proteaceae. The sole described species is Athertonia diversifolia, commonly known as Atherton oak, athertonia, creamy silky oak or white oak. It is endemic to a small part of the Wet Tropics of Queensland, Australia. A relative of the macadamia, it has potential in horticulture and the bushfood industry.
Megacrania batesii, commonly known as the peppermint stick insect, is an unusual species of stick insect found in northeastern Australia, the Bismarck Archipelago, the Solomon Islands, New Guinea, and possibly as far north as the Philippines. It is notable for its aposematic coloration, as well as its robust chemical defense mechanism. Its common name refers to the irritating fluid — with an odor resembling peppermint — that it sprays as a defensive action from a pair of glands located at its prothorax when threatened, as well as the cylindrical, twig-like shape of its body. A member of the subfamily Megacraniinae, it was first described by English naturalist and explorer Henry Walter Bates in 1865.
Agathis atropurpurea, commonly known as the blue kauri, and occasionally as the black kauri or purple kauri, is a species of conifer in the very ancient plant family Araucariaceae. The family was distributed almost worldwide during the Jurassic and Cretaceous periods, but is now mostly confined to the Southern hemisphere. This species is endemic to a small part of northeastern Queensland, Australia.
Normanbya is a monotypic genus of palms containing the single species Normanbya normanbyi, which is known by the common name black palm It is endemic to Queensland, Australia and is threatened by habitat destruction.
Cardwellia is a monotypic genus in the plant family Proteaceae. The sole described species is Cardwellia sublimis − commonly known as northern silky oak, bull oak or lacewood − which is endemic to the rainforests of northeastern Queensland, Australia.
Phaleria clerodendron, commonly known as scented daphne, scented phaleria or rosy apple, is an evergreen tree or tall shrub in the family Thymelaeaceae. It is endemic to the rainforests of north-eastern Queensland, Australia.
Carnarvonia araliifolia, commonly known as the red oak, red silky oak, Caledonian oak or elephant's foot, is the sole species in the monotypic genus Carnarvonia, a member of the Proteaceae plant family. It is endemic to the rainforests of northeastern Queensland.
Syzygium alliiligneum, commonly known as onionwood, Mission Beach satinash or bark in the wood is a species of plant in the family Myrtaceae. It is endemic to a small part of north eastern Queensland.
Palaquium galactoxylum, commonly known as Cairns pencil cedar, Daintree maple or red silkwood, is a species of very large tree in the family Sapotaceae which is endemic to rainforests of New Guinea and northern Australia. It can produce spectacularly large buttress roots.
Hydriastele wendlandiana, commonly known as Wendland's palm, cat o' nine tails, creek palm or kentia palm, is a tall, multi-stemmed tree in the palm family Arecaceae. It is native to New Guinea and the Australian states of Queensland and the Northern Territory.
Xanthophyllum octandrum, commonly known as Macintyre's boxwood, false jitta, yellow boxwood or sovereignwood, is a slow-growing tree in the milkwort family Polygalaceae which has the potential to reach thousands of years of age. It is endemic to coastal northeastern Queensland, Australia.
Selaginella longipinna, commonly known as the electric fern, is a plant in the spike moss family Selaginellaceae. It is endemic to northeastern Queensland, growing in rainforest and closed forest from Cooktown to near Mission Beach, including the Atherton Tablelands. It is a terrestrial plant forming a dense cover to 40 cm (16 in) high, often near streams.
Selaginella australiensis is a plant in the spikemoss family Selaginellaceae endemic to northeastern Queensland. It grows in rainforest and closed forest from Cooktown to near Mission Beach, including the Atherton Tablelands. It is a low growing and much branched terrestrial plant inhabiting damp shady locations, typically along stream banks.
Selaginella brisbanensis is a plant in the spikemoss family Selaginellaceae endemic to northeastern and southeastern Queensland. It grows in rainforest and wet sclerophyll forest in two very disjunct populations, one centred around Cairns and the other around Brisbane, some 1,400 km (870 mi) south. It is a terrestrial plant growing up to 20 cm (7.9 in) high.
Alstonia muelleriana is a tree in the dogbane family Apocynaceae which is native to southern Papua New Guinea and northeastern Queensland.
Archidendron vaillantii, commonly known as the salmon bean, is an evergreen tree in the legume family Fabaceae. It is endemic to the rainforests of northeast Queensland.
Pandanus grayorum is a plant in the family Pandanaceae which is endemic to a very small area of northeast Queensland. It is closely related to both Pandanus gemmifer and Pandanus solms-laubachii, and it coexists with the latter.
Pandanus gemmifer, commonly known as pup pandan, is a plant in the family Pandanaceae that is endemic to northeast Queensland. It is closely related to Pandanus grayorum and Pandanus solms-laubachii.