Lithocarpus jacobsii

Lithocarpus jacobsii
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Rosids
Order:	Fagales
Family:	Fagaceae
Genus:	Lithocarpus
Species:	L. jacobsii
Binomial name
	Lithocarpus jacobsii; Soepadmo[1]

Lithocarpus jacobsii is a tree in the beech family Fagaceae. It is named for the Dutch botanist Marius Jacobs.[2] Trees in Lithocarpus are commonly known as the stone oaks and differ from Quercus primarily because they produce insect-pollinated flowers.

Description

Lithocarpus jacobsii grows as a tree up to 36 metres (120 ft) tall with a trunk diameter of up to 60 cm (24 in). The brown bark is smooth or lenticellate. The coriaceous leaves are unusual and distinctive because of their cordate base that often seems to clasp the stem on a short petiole. The oblong leaves can be quite large, measuring up to 56 cm (22 in) long and are glabrous and the same color on both the upper and lower sides (concolorous), with prominent secondary veins below and a looping marginal vein.

The infructescence can be quite long with numerous clusters of fruit scattered along the rachis. The fruits are generally in clusters of 3 (and up to 10). The cupules only cover the lower part of the nut and have squamose scales arranging loosely in cyclical series. The brown nuts are also glabrous and ovoid to roundish and measure up to 2.8 cm (1 in) across.[2]

Distribution and habitat

Lithocarpus jacobsii is endemic to Borneo.[1] Its habitat is mixed dipterocarp to lower montane forests up to 1,300 m (4,000 ft) altitude.[2]

References

"Lithocarpus jacobsii". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew. Retrieved 28 March 2018.
Soepadmo, E.; Julia, L.; Go, Rusea (2000). "Lithocarpus jacobsii Soepadmo". In Soepadmo, E.; Saw, L. G. (eds.). Tree Flora of Sabah and Sarawak. (free online from the publisher, lesser resolution scan PDF versions). 3. Forest Research Institute Malaysia. pp. 63–64. ISBN 983-2181-06-2. Archived from the original (PDF) on 27 September 2013. Retrieved 28 March 2018.

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[WCSP-1] "Lithocarpus jacobsii". World Checklist of Selected Plant Families (WCSP). Royal Botanic Gardens, Kew. Retrieved 28 March 2018.

[TFSS-2] Soepadmo, E.; Julia, L.; Go, Rusea (2000). "Lithocarpus jacobsii Soepadmo". In Soepadmo, E.; Saw, L. G. (eds.). Tree Flora of Sabah and Sarawak. (free online from the publisher, lesser resolution scan PDF versions). 3. Forest Research Institute Malaysia. pp. 63–64. ISBN 983-2181-06-2. Archived from the original (PDF) on 27 September 2013. Retrieved 28 March 2018.