Alocasia wongii

Wong, Sin Yeng & Joling, Jyloerica, 2021, Checklist of aroids (Alismatales, Araceae) from Sabah (Malaysian Borneo), Check List 17 (3), pp. 931-974 : 943

Alocasia wongii A.Hay

Figure 2H

Material examined. MALAYSIA – Pedalaman • Keningau, Sepulut , growing on rocky place; 06°20′N, 116° 40′E; 3 June 1985; Aban G. et al. SAN 107969 ( SAN) • Keningau, Tambunan, Primary forest , flatland; 04°33′59″N, 116°58′01″E; 19 October 1983; Amin & Pat- rick SAN 69048 ( SAN) • Sipitang, Ganui Forest Reserve , secondary forest; 05°00′25″N, 115°41′32″E; 380 m elev.; 17 March 2011; Pereira, J. T. & Jamirus, J. SAN 153520 ( SAN) – Sandakan • Beluran, Sungai Kolayok , on ridge hill; 05°53′50″N, 117°39′48″E; 28 August 2018; Amin & Mohamid SAN 111046 ( SAN) • Beluran, Ulu Tungud Forest reserve ; 05°51′28″N, 116°58′37″E; 370 m elev.; 23 July 2005; Joanes et al. SAN 146876 ( SAN) • Kinabatangan, Bukit Garam ; 05°29′13″N, 117°51′19″E, 11 November 2019; Reza A. RA 30 (K, KEP, L, SAN, SAR) • Kinabatangan, Kota Kinabatangan , 05°26′02″N, 117°52′01″E; 3 April 1992; Dewol, Francis & Dauni SAN 132484 ( SAN) • Sandakan, Gomantong Caves , 05°31′33″N, 118°04′24″E; 31 October 1968; S. Kokawa & Mitsuru Hotta, Kokawa & Hotta 576 (L) • Sandakan, Lamag, Sungai Pin ; 05°23′28″N, 117°52′53″E; 25 November 1978; Dewol & Harun SAN 89905 ( SAN) • Sandakan, Sepilok Forest Reserve, understory primary forest at Jalan Batu 15; 05°49′36″N, 117°57′04″E; 11 De- cember 1973; Aban G. SAN 76687 ( SAN) • Sandakan, Ulu Dusun Agriculture Research Station ; 05°47′11″N, 117°46′06″E; 100 m elev.; 29 August 1989; Yap S. K. & Khairuddin SAN 106089 ( SAN) • same locality, 10 August 1977; S. Lantoh SAN 87802 ( SAN) • Tongod, Pinangah ; 05°18′40″N, 117°06′10″E; 4 February 1983; Dewol & Mansus SAN 67396 ( SAN) • Tongod, ridge of Bukit Mengalas-Kalas, disturbed Dipterocarp forest ; 05°30′25″N, 116°52′15″E; 68 m elev.; 12 March 1981; Dewol S. SAN 93149 ( SAN) • Tongod, Ulu Sungai Pinangah , undulating land; 05°23′27″N, 117°52′52″E; 22 October 1984; Amin & Ismail SAN 107302 ( SAN) – TAWAU • Kunak, Madai-Baturong Forest Reserve, Madai , Near Sungai Madai; 04°44′30″N, 118°07′55″E; 25 December 1993; Majawat & Kumin SAN 138329 ( SAN) • Lahad Datu, Selangan Forest Reserve ; 04°34′20″N, 118°30′05″E; 9.144 m (30 ft.) elev.; 13 August 1948; H. G. Keith A 1519 ( SAN) • Lahad Datu, Silam , hillside; 04°59′00″N, 118°13′10″E; 23 October 2007; Pius et al. SAN 149373 ( SAN) • Lahad Datu, Tabin Wildlife Reserve, near Wildlife Department’s Headquarter ; 05°18′N, 118°44′E; 150 m elev.; 22 February 2000; K. H .

Kjeldsen K. H. Kjeldsen 23 ( SAN) • same locality; 150 m elev.; 1 March 2000, K. H. Kjeldsen K. H. Kjeldsen 58 ( AAU, SAN) • Lahad Datu, Tabin Wildlife Reserve, trail to Lipad Mud Volcano ; 05°14′30″N, 118°50′16″E; 28 May 1998; F. Borchsenius FB 506 ( BORH, SAN) • Semporna , Bohey Dulang Island, Taman Marin Tun Sakaran; 04°35′50″N, 118°47′11″E; 185 m elev.; 2 August 2009; Kinahim et al. SP 16501 ( SNP) • Semporna, Selangan Forest Reserve , in forest; 04°34′20″N, 118°30′05″E; 6.096 m (20 ft.) elev.; 17 July 1938; H. G. Keith 9286 ( SAN) • Tawau, Taman Bukit Tawau, trail to Hot Spring ; 04°25′41″N, 117°53′23″E; 200 m elev.; 26 January 2000; Fauzi Laimin SP 14785 ( SNP) • Tawau, TBC, route to Dipterocapaceae Plot 1 A; 459 m elev.; 7 June 2005; Dolois et al. SP 10176 ( SNP) • Tawau, TBC, Trail Taman Haiwan ; 300 m elev.; 10 June 2003; Yabainus et al. SP 17771 ( SNP) • Tawau, TBT, Ulu Sungai TBT, Trail Utama Barat ; 300 m elev.; 19 May 2003, Yabainus et al. SP 17903 ( SNP) • Tawau, Ulu Kalumpang Forest Reserve ; 04°35′13″N, 117°57′42″E; 400 m elev.; 12 October 1996; Diwol Sundaling SAN 135224 ( SAN) .

Identification. A fairly well-defined and geographically coherent element distinguished from A. princeps s.s. by the generally slenderer stature, the petiole with markings distinctive in the complex but almost identical to those typically found in A. longiloba ‘denudata’. The spathes are suffused a rather dirty purpe-brown or violet-brown, with the limb somewhat darker than the lower spathe. The lower spathe in flower and the fruiting spathes are less rotund, and the limb shorter and slenderer than in A. princeps . The spadix is slenderer with the pistils and synandrodia rather loosely arranged and the male zone is less exserted ( Hay 1998).

Distribution and ecology. Endemic to Sabah. Eastern, southwestern, and northeastern Sabah. Terrestrial in lowland mixed dipterocarp forest on well-drained and occasionally inundated sites at low elevation.