Lasia spinosa

Wong, Sin Yeng & Joling, Jyloerica, 2021, Checklist of aroids (Alismatales, Araceae) from Sabah (Malaysian Borneo), Check List 17 (3), pp. 931-974 : 952-954

Lasia spinosa (L.) Thwaites

Material examined. MALAYSIA – Pedalaman • Beaufort, Klias Forest Reserve, forest between Klias Forest Reserve and Upper Sungai Api-Api ; 5 m elev.; 7 May 1998; 05°18′N, 115°40′E; S. P. Lim 1811 ( SAN) • Tenom, Agr. Station ; 05°10′54″N, 115°59′23″E; 2 November 1987; Mansus & Good SAN 122364 ( SAN) – Sandakan • Beluran, KBD estate Komansi Labuk ; 05°30′00″N, 117°00′00″E; 4 May 1965; W. Meijer & Kodoh SAN 49814 ( SAN) • Kinabatangan, Pin, Pin Timber Camp , S of Bt. Pin Besar; 05°23′28″N, 117°52′52″E; 25 Novem- ber 1968; Kokawa & Hotta 1521 (L) • Sandakan, Komansi River swampy river side, Pamol Estate ; 05°37′45″N, 117°08′00″E; 6.096 m (20 ft.) elev.; 14 May 1965; W. Mei- jer SAN 51629 ( SAN) • Sandakan, Laila Eat Corner near town Singapora road; 05°50′06″N, 118°05′46″E; 10-40 m elev.; 16 October 1994; W. Meijer SAN 134360 ( SAN) .

Identification. Stems suffruticose, erect to decumbent with spiny internodes. Leaves usually dissected, or hastate. Spathe caducous or rarely marcescent. Placentation apical with fruit spiny ( Hay 1992).

Distribution and ecology. Southwestern and northeastern Sabah. Found growing in swamps, riverbanks, ditches, moist places, occasionally in boggy places in forest undergrowth in tropical and subtropical forests. Sometimes cultivated along fishponds and rice fields.

Nabalu corneri (A.Hay) S.Y.Wong & P.C.Boyce Figure 5A

Material examined. MALAYSIA – Pedalaman • Tenom,

Trus Madi , Batu Lapan; 05°38′20″N, 116°27′05″E; 731 m elev.; 26 March 1999; Ruth Kiew 4670 ( SAN) – Pantai Barat • Ranau , Kinabalu , Silau Basin, Upper Kinabalu; [06°05′30″N, 116°32′45″E], 1829 m elev.; 1829 m elev.; 19 April 1932, Clemens & Clemens 29156 (L) • Ranau , Mount Kinabalu, Dallas, [06°5′30″N, 116°32′45″E], 1000 m elev.; 1931; Clemens & Clemens s.n. (L) • same locality; 1000 m elev.; April 1932; Clemens & Clemens 29157 (L) • Ranau , Mount Kinabalu, Eastern Shoulder; [06°05′N, 116°36′40′′E]; 1066.8 m (3500 ft.) elev.; 18 June 1961; E. J. H. Corner & A. Stainton RSNB 642 ( SAN) – Sandakan • Maliau Basin Conservation Area , Rafflesia Camp; 04°49′46″N, 116°53′49″E; 500 m elev.; 26 April 2000; Ming & Sidkan MB 297 ( SAN) .

Identification. Nabalu corneri is defined by its massive arborescent pachycaul. The leaf sheath wings are persistent. The inflorescence is nodding with the spathe is hardly opening ( Low et al. 2018).

Distribution and ecology. Highly localized. Disturbed forest or open sites by rivers among rocks, sometimes in great numbers together, 550–1000 m elev.