Samadera

''Samadera'' is a genus of four species of plants belonging to the family Simaroubaceae in the order Sapindales. Its range is from eastern Africa through tropical Asia to eastern Australia.

Type species: ''Samadera indica'' Gaertn

Description

Plants in this genus are large or small trees with simple leaves. The flowers are bisexual, produced in axillary or terminal umbels. The calyces (collective name for the sepals) are small, 3-5 partite (divided into parts) and imbricate (overlapping each other). The 3-5 petals are much longer than the calyx, they are coriaceous (leather-like, stiff and tough) and imbricate. The flower disk is large, conical, with 8-10 stamens, including in the corolla, with a small scale at the base. The stigmas are acute and the ovules are solitary and pendulous. The fruit (or seed capsule) consists of 1-5 large dry compressed 1 seeded drupes (stone fruit), each with a narrow unilateral wing.Edmund Gregory

Taxonomy

It was first published and described by German Botanist Joseph Gaertner (1732–1791) in his seminal book ''De Fructibus et Seminibus Plantarum'' vol.2 on page 352 in 1791.

The species was later placed in the section ''Samadera'' of the Simaroubaceae by Hans Peter Nooteboom (1934–2022) in 1962 (published in 1963), as ''Quassia indica'', along with '' Samadera harmandiana'' as ''Quassia harmandiana''. Nooteboom had taken a very broad view of the genus ''Quassia'' and included therein various genera including, ''Hannoa'' , '' Odyendyea'' , ''Pierreodendron'' , ''Samadera'' , '' Simaba'' and ''Simarouba'' .

In 2007, DNA sequencing, and phylogenetic analyses was carried out on members of the Simaroubaceae family. It found that genus ''Samadera'' was a sister to Clade V and that genus ''Quassia'' was also a sister to Clade V but they had separate lineages. This suggested the splitting up of genera ''Quassia'' again, with all Nooteboom's synonyms listed above being resurrected as independent genera. This includes ''Samadera indica'' as the accepted name for ''Quassia indica''. The ornamental ''Quassia amara'' , which is occasionally planted in Singapore, remains in genus ''Quassia''.

Genus ''Samadera'' is agreed name by various authors including Klaus Kubitzki, Devecchi et al. 2018, and Pirani et al. 2021.

It is listed as a possible synonym of ''Quassia'' by GRIN (United States Department of Agriculture and the Agricultural Research Service), and by World Flora Online.

Etymology

The genus name of ''Samadera'' is derived from the New Latin, from Sinhalese word ''samadarā'', a tree of Ceylon.

Species

It has 4 known species;
* '' Samadera baileyana'' - only found in northern Queensland, Australia
* '' Samadera bidwillii'' - only found in Queensland,
* '' Samadera harmandiana'' - Cambodia, Laos and Vietnam
* '' Samadera indica'' - see below Distribution text

Tropicos lists 5 known species; ''Samadera harmandiana'' , ''Samadera indica'' , ''Samadera lucida'' , ''Samadera madagascariensis'' and ''Samadera tetrapetala''

Distribution

The genus is native to Tanzania (including Pemba Island), Comoros, Madagascar, India, Sri Lanka, Bangladesh, the Andaman Islands, Cambodia, Laos, Myanmar, Vietnam, Malaysia, Sumatra, Borneo, Sulawesi, the Philippines, the Caroline Islands, New Guinea (including the Bismarck Archipelago), the Solomon Islands, Vanuatu, and eastern Australia (New South Wales and Queensland).

Habitat

''Samadera indica'' for example, occurs in lowland tropical forest and peat swamp forest. at an altitude of above sea level.

While ''Samadera bidwillii'' is commonly found in Queensland, Australia within lowland rainforest often with species ''Araucaria cunninghamii'' or on the edges of rain-forests, but it can also be found in other forest types, such as open forest and woodland, it is commonly found in areas adjacent to both temporary and permanent watercourses. At an altitude of above sea level.

Conservation

''Samadera indica'' (''Quassia indica'') was assessed for the IUCN Red List of Threatened Species in 2019. ''Samadera indica'' is listed as least concern (LC).

''Samadera bidwillii'' is listed in Australia as vulnerable under the Environment Protection and Biodiversity Conservation Act 1999 and vulnerable under the Queensland Nature Conservation Act 1992. Due to threats to its habitat, such as clearing as a result of a range of activities including agriculture, forestry, urban development and recreational activities. The spread of non-native species such as lantana (''Lantana camara'') and exotic grasses, including guinea grass (''Megathyrsus maximus'') and Rhodes grass (''Chloris gayana''), may also threaten populations of ''Samadera bidwillii''.

Uses

Some species such as ''Samadera indica'' are gathered from the wild and are used medicinally in local folk medicines and also used to produce insecticides. The wood of the tree is used locally for example in the state of Sarawak in Malaysia, where it is used for making knife-handles.

In the state of Kerala, India species ''Samadera indica'' has found to have anti-tumor, antifeedant, phytotoxic, antiviral, anthelmintic, and anti-malarial activities, growth regulating activities, and antioxidant, and antimicrobial activities. It was used to vitiate diseases such as ''vata'', ''kapha'', arthritis, constipation, and skin diseases like leprosy, scabies, pruritus, and erysipelas.

A methanolic extract of ''Samadera indica'' can be used to treat skin diseases.

References

{{Taxonbar, from=Q6118009

Sapindales genera
Plants described in 1791
Taxa named by Joseph Gaertner