Cratoxylum glaucum

Cratoxylum glaucum
	In West Kalimantan, Borneo
Conservation status
	; Least Concern (IUCN 3.1)
Scientific classification
Kingdom:	Plantae
Clade:	Embryophytes
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Malpighiales
Family:	Hypericaceae
Genus:	Cratoxylum
Species:	C. glaucum
Binomial name
	Cratoxylum glaucum; Korth.
Synonyms
	Cratoxylum microphyllum Miq.; Cratoxylum polystachyum Turcz.; Cratoxylum procerum Diels;

Cratoxylum glaucum is a species of flowering plant in the family Hypericaceae. It is a tree native to Borneo, Peninsular Malaysia, and Sumatra.^[2]

The species was described by Pieter Willem Korthals in 1848.^[2] The specific epithet glaucum is from the Latin meaning 'blue-green', referring to the colour of the leaf underside.^[3]

Description

Cratoxylum glaucum grows as a shrub or tree measuring up to 25 metres (80 ft) tall with a diameter of up to 45 centimetres (20 in). The flaky bark is reddish brown. The flowers are crimson. The fruits measure up to 1 cm (0.4 in) long.^[3]

Distribution and habitat

Cratoxylum glaucum grows naturally in Sumatra, Peninsular Malaysia and Borneo (including offshore islands). Its habitat is primary and secondary lowland rain forests (including kerangas forests and peat swamp forests) from sea-level to 1,100 metres (3,600 ft) elevation.^[3]^[1]

References

1 2 IUCN SSC Global Tree Specialist Group.; Botanic Gardens Conservation International (BGCI). (2024). "Cratoxylum glaucum". IUCN Red List of Threatened Species. 2024 e.T37755A242275369. doi:10.2305/IUCN.UK.2024-1.RLTS.T37755A242275369.en. Retrieved 15 April 2026.
1 2 3 4 "Cratoxylum glaucum Korth". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 14 April 2026.
1 2 3 Wong, K. M. (1995). "Cratoxylum glaucum Korth.". In Soepadmo, E.; Wong, K. M. (eds.). Tree Flora of Sabah and Sarawak. (free online from the publisher, lesser resolution scan PDF versions). Vol. 1. Forest Research Institute Malaysia. p. 225. ISBN 983-9592-34-3. Archived from the original (PDF) on 27 September 2013. Retrieved 29 May 2014.

[iucn-1] 1 2 IUCN SSC Global Tree Specialist Group.; Botanic Gardens Conservation International (BGCI). (2024). "Cratoxylum glaucum". IUCN Red List of Threatened Species. 2024 e.T37755A242275369. doi:10.2305/IUCN.UK.2024-1.RLTS.T37755A242275369.en. Retrieved 15 April 2026.

[powo-2] 1 2 3 4 "Cratoxylum glaucum Korth". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 14 April 2026.

[TFSS-3] 1 2 3 Wong, K. M. (1995). "Cratoxylum glaucum Korth.". In Soepadmo, E.; Wong, K. M. (eds.). Tree Flora of Sabah and Sarawak. (free online from the publisher, lesser resolution scan PDF versions). Vol. 1. Forest Research Institute Malaysia. p. 225. ISBN 983-9592-34-3. Archived from the original (PDF) on 27 September 2013. Retrieved 29 May 2014.

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