(Malvaceae) Pterospermum lanceifolium Roxb. ex DC.

Local name(s): (kok seng)

Medicinal use(s): Treat rigid nerve, rigid tendon. 

Part(s) used: root, stem

Field Characters: Tree 9 m tall, fruits brown, ellipsoid, pendulous. Only this tree seen.

Locality: Savannakhet Province, Kaysone district, Medicinal Biodiversity Preserve, at 19 km from city center on road Kaysone-Seno.

Habitat: Broadleaved evergreen, lowland tropical rain forest in regeneration from some degree of past conversion.

Altitude: 158 m asl. 

Collector(s): D.D. Soejarto, K. Sydara, O. Souliya

Collection number(s): DDS 14907

Collection Date: December 17, 2013

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Local name(s): ກົກແສນ, ໄມ້ກະສີນ (Kok sen)

Medicinal use(s): Treat rheumatism 

Part(s) used: stem (stembark and stemwood)

Field Characters: Tree 10-20 m tall. Simple leaves alternate, oblong, hairy. Fruit a capsule. 

Locality: Khammuan Province; Nyommalath District; Thongkong Village, roud  side of Route to Khammouane Medicinal Biodiversity Preserve; at the southern reaches of Nakai Nam Theum National Park. 

Habitat: Tropical rainforest on flat level lands. 

Altitude: 150 m asl. 

Collector(s): O. Souliya, K. Phoulivong, D. Makiem and S. Pimmavong 

Collection number(s): Onevilay_YML_013

Collection Date: July 21, 2023

Additional information:  

Voucher specimen is in deposit at the Field Museum (F) Herbarium, Chicago, USA under accession no. 2313751; 2333615.

Synonyms, images, taxonomic description: 

Plants of the World onlineFlora of China Vol. 12 Page 327, 329GBIF | Global Biodiversity Information FacilityBiotikc Laos

Medicinal properties:


Chatterjee P, Chakraborty B, Nandy S, et al. Pterospermum acerifolium Linn. : A comprehensive review with significant pharmacological activities. Int J Pharm & Life Sci (IJPLS) 2012, vol. 3, issue 2:1453-1458. https://www.ijplsjournal.com/issues%20PDF%20files/feb_2012/9.pdf 

Jena J, Verma S, Rai JK, et al.  Pterospermum acerifolium Linn: Ethnomedicinal uses, phytochemistry and pharmacology: A review. Journal of Pharmacognosy and Phytochemistry 2023, 12(1): 708-715. DOI: https://dx.doi.org/10.22271/phyto.2023.v12.i1f.14617 

Steven AN, Bachuri K, Mat Hussin NSS, et al.  (2024). Anticancer agents and genetic identification of Pterospermum, an indigenous plant of Sarawak, Malaysia. Journal of Taibah University for Science 2014, 18(1). https://doi.org/10.1080/16583655.2024.2325677