Friday, October 6, 2017

[Botany • 2017] Hopea macrocarpa • A New Species (Dipterocarpaceae) from Peninsular Thailand

Hopea macrocarpa Poopath & Sookch. 

in Poopath, Sookchaloem, Duangjai & Pooma. 2017
ชันหอม  || DOI: 10.20531/tfb.2017.45.2.02 


A new species of the important timber tree family Dipterocarpaceae, Hopea macrocarpa Poopath & Sookch., from Hala-Bala forest, Narathiwat, Thailand is described and illustrated. Hopea macrocarpa is morphologically similar to H. mengarawan Miq. from Peninsular Malaysia, Sumatra and Borneo in its leaf shape, leaf size, leaf blade texture and number of secondary nerves. The new species differs from H. mengarawan, however, by having bigger flower buds, bigger fruits and longer fruit stalks.

KEYWORDS: Conservation assessment, Hala-Bala forest complex, Hopea, taxonomy.

Figure 2.  Hopea macrocarpa Poopath & Sookch.:
 A. stilt roots & bark; B. resin; C. inner bark; D. inflorescences; E. flowers; F. fruit.
Photographed by Manop Poopath.

 Hopea macrocarpa Poopath & Sookch., sp. nov. 
Hopea sp., Poopath, Sookchaloem & Santisuk, Thai Forest Bull., Bot. 40: 80, 2012.
Hopea sp. 1, Pooma, Poopath & M.F.Newman, Flora of Thailand Vol. 13(4): 617. 2017.

Thailand.— PENINSULAR: Narathiwat
[Sukhirin, Ban Phu Khao Thong, alt. 250 m, 15 May 2005, Poopath B105 (BKF); ibid, alt. 250 m, 11 July 2005, Poopath B118 (BKF); Waeng, Hala-Bala Wildlife Sanctuary, alt. 220 m, 8 June 2004, ....].

Distribution.— Endemic to Thailand, known only from Narathiwat Province. 

Ecology.— Tropical rain forest, foot hills to ridges, 50–300 m alt., rather rare, associated with lowland Dipterocarps species, i.e. Dipterocarpus grandiflorus (Blanco) Blanco, Shorea parvifolia Dyer, S. singkawang (Miq.) Miq., Hopea pedicellata (Brandis) Symington, H. latifolia Symington, H. bracteata Burck and Vatica bella Slooten. 

Vernacular.— Chan hom (ชันหอม). 

Etymology.— The specific epithet ‘macrocarpa’ refers to the large fruit.

Manop Poopath, Duangchai Sookchaloem, Sutee Duangjai, Rachun Pooma. 2017. Hopea macrocarpa (Dipterocarpaceae), A New Species from Peninsular Thailand. THAI FOREST BULL., BOT45(2); 94-98. DOI: 10.20531/tfb.2017.45.2.02


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