Rhaphidophora fluminea Ridl.

Wong, Sin Yeng & Joling, Jyloerica, 2021, Checklist of aroids (Alismatales, Araceae) from Sabah (Malaysian Borneo), Check List 17 (3), pp. 931-974 : 958

Rhaphidophora fluminea Ridl.

Material examined. MALAYSIA – Pedalaman • Keningau, Camp C area Tiulan ; 05°07′31″N, 116°23′02″E; 31 October 1983; Maikin Lantoh SAN 102053 ( SAN) • Keningau, Lanas, Shang Lian logging area; 05°25′03″N, 116°29′28″E; 21 October 1986; Fidilis Krispinus SAN 118444 ( SAN) • Keningau, Ulu Sungai Matud ; 05°12′N, 116°06′E; 29 June 1987; Shawn Tangki SAN 119596 ( SAN) • Keningau, Ulu Sungai Pingas-Pingas , along the riversides; 05°14′20″N, 116°40′32″E; 8 March 1988; Sumbing Jimpin SAN 122024 ( SAN) • Pensiangan, logged areas, Ponontomon ; 05°01′21″N, 115°57′15″E; 23 September 1989; Sumbing Jimpin SAN 128024 ( SAN) • Pensiangan, Pensiangan Kayu ; 04°52′02″N, 116°16′53″E; 21 January 1994; Asik Mantor SAN 136885 ( SAN) – Pantai Barat • Ranau, Kampung Paus , edge of riverbank; 05°41′12″N, 116°47′02″E; 23 February 1982; Amin G. SAN 94681 ( SAN) – Sandakan • Beluran, Labuk & Sugut , Doji , western side of Bt. Doji and pass way from Telupid to Ulu Karamuak ; [05°37′42″N, 117°06′48″E]; 100 m elev.; 25 October 1968; Kokawa & Hotta 471 (L) • Beluran, Sungai Baba ; 05°45′01″N, 117°08′40″E; 1 March 1980; Aban G. SAN 90040 ( SAN) • Kinabatangan, Imbak Canyon ; 05°07′N, 116°58′E; 160 m elev.; 15 May 2004; H. Nagamasu 7278 (K, KEP, KYO, L) • Sandakan, Babakang River, VJR Mile 42; 05°06′42″N, 118°59′39″E; 16 December 1985; Lideh et al. SAN 118056 ( SAN) • Sandakan, Labuk & Sugut, along Sungai Meliau , foot of Mt. Tawai , Telupid ; [05°30′33″N, 117°3′54″E]; 20 Octo- ber 1968; Kokawa & Hotta 110 (L) • Sandakan, Labuk Road Mile 45; [05°41′57″N, 117°36′12″E]; 26 July 1964; W. Meijer SAN 44014 (K, L, SAN) • Sandakan, Labuk Sugut, Ulu Tungud , Ensuan ; 05°47′20″N, 117°07′58″E; 26 January 1987; Amin K. & Mansus SAN 117025 ( SAN) • Sandakan, Lamag, Sungai Lokan ; [05°29′51″N, 117°20′03″E]; 5 June 1983; Amin K. et al. SAN 97483 ( SAN) • Sandakan, Lamag, Ulu Sungai Lokan , side of streams on rocks; [05°29′51″N, 117°20′03″E]; 8 No- vember 1979; Aban G. & Petrus SAN 90675 ( SAN) • Sandakan, Lungmanis, Virgin Jungle Reserve 45 A; 05°38′40″N, 117°43′25″E, 19 December 1985; De- wol S. et al. SAN 118075 ( SAN) • Sandakan, Sepilok Forest Reserve ; 05°49′36″N, 117°57′04″E; 17 January 1989; Kessler SAN 118160 ( SAN) • Sandakan, Trail to Ulu Sungai Tariu , Kampung Wonod ; [05°38′38″N, 117°05′24″E]; 14 March 1974; Aban G. & Saikeh, SAN 79387 ( SAN) • Telupid, Penangah Forest Reserve ; 4°58′41″N, 116°52′11″E; 20 July 1993; Fidilis K. SAN 135710 ( SAN) • Telupid, VJR Ulu Sungai Sapapayau, at riverbank of Sungai Merah ; 05°30′N, 118°30′E; 15 October 1985; Dewol S. et al. SAN 109519 ( SAN) – Tawau • Kalabakan, Batu Timbang VJR, 06°27′14″N 116°48′07″E; 12 March 2015, Ubaldus, M. & Tawadong, T. SAN 157055 ( KEP, SAN) .

Identification. Rhaphidophora fluminea is differentiated from R. beccarii Engl. (both species are rheophytes) by having falcate, narrow, entire leaf blades and a bright yellow spathe and spadix vs. mature leaf blade pinnatifid to pinnatisect and a creamy yellow spathe and spadix.

Distribution and ecology. Rhaphidophora fluminea is endemic to Sabah. Widespread. Occurs on exposed mud near river.