Epirixanthes in Brunei Darussalam 
183 
Specimens examined. BRUNEI DARUSSALAM: Belait: Labi, Sungai Rampayoh, ca. 3.5 
km above road towards Waterfall No. 2, 9 Jan 1994, Coode 7784 (BRUN). Temburong: 
Batu Apoi Lorest Reserve, ridge W of Kuala Belalong Lield Studies Centre, in Danish Plot, 
mixed dipterocarp forest, 1991, Poulsen 224 (AAU, BRUN); Kuala Belalong, E ridge of 
Sungai Belalong, ca. 1.5 km SE from its confluence with Sungai Temburong, depression NW 
of ecological plot 2, 13 Feb 2015, Hedl & Chudomelova RH132015 (OL); Kuala Belalong, 
E ridge of Sungai Belalong, ca. 0.9 km ESE from its confluence with Sungai Temburong, 
ecological plot 1,13 Jan 2014, Dancdk 2014/6 (OL); ibidem, 13 Jan 2014, Dancdk 2014/125 
(OL); ibidem, 13 Jan 2014, Dancdk 2014/160 (OL); ibidem, 13 Jan 2014, Dancdk 2014/180 
(OL); ibidem, 4 Feb 2015, Hrones & Kobrlovd 702015 (OL); Sungai Temburong at Kuala 
Belalong, 23 Jun 1989, Dransfield 1007 (BRUN); Apan, ridge to the north of the river, 13 Jul 
1993, Sands 5786 (BRUN); Amo, southeast of LP 297 Bkt. Lutut, 6 Apr 2004, Ariffin et al. 
BRUN20797 (BRUN); Labu, Peradayan F. R., 5 Feb 2002, Ariffin et al BRUN 19913 (BRUN). 
Notes. This is the most common species of Epirixanthes. It is locally abundant 
elsewhere in Borneo, and is presumably also common in Brunei Darussalam. In Kuala 
Belalong it is almost ubiquitous and by far the most abundant species of Epirixanthes. 
This species is easily recognised among Bruneian Epirixanthes as its bracts are shed 
well before the flowers open and the inflorescence is very long and narrow. One of 
the specimens studied ( Hrones & Kobrlovd 702015) is a very pale-coloured plant 
conspicuously different from the typical brownish-purple plants of E. elongata. Such 
pale ivory individuals are known to occur within populations of E. elongata and they 
were described from West Kalimantan as E. elongata f. alba Tsukaya & H.Okada 
(Tsukaya & Okada, 2012). 
3. Epirixanthes kinabaluensis T.Wendt, FI. Males., Ser. 1, Spermat. 10(3): 491 (1988). 
(Fig. 2C) 
Global distribution. The species is found in Sumatra and Borneo (Van der Meijden, 
1988). 
Distribution in Brunei Darussalam. It is known only from two locations in the 
immediate vicinity of the Kuala Belalong Field Studies Centre in the Temburong 
district. Its known elevational range in Brunei Darussalam is very narrow as it is 
recorded only from altitudes around 100 m a.s.l., even though its type locality, the 
slopes of Mt. Kinabalu in Sabah, lies at around 900-1200 m a.s.l. We have observed 
the species in the Kelabit Highlands of Sarawak up to c. 1300 m a.s.l. 
Specimens examined. BRUNEI DARUSSALAM: Temburong: Kuala Belalong, Sungai Esu 
valley, at its confluence with Sungai Belalong, 9 Jan 2014, Dancdk 2014/162 (OL); ibidem, 18 
Jan 2014, Dancdk 2014/343 (OL); Kuala Belalong, Sungai Esu, clayey bank near its confluence 
with Sungai Belalong, 21 Jan 2017, Dancdk 2017/46 (BRUN); Kuala Belalong, Earthwatch 
ecological plot ca. 0.3 km W from the Kuala Belalong Field Studies Centre, 28 Jan 2016, 
Dancdk 2016/292 (OL). 
