Amorphophallus venustus Hett.

Wong, Sin Yeng & Joling, Jyloerica, 2021, Checklist of aroids (Alismatales, Araceae) from Sabah (Malaysian Borneo), Check List 17 (3), pp. 931-974 : 945-946

Amorphophallus venustus Hett. , A.Hay & Mood Figure 3E, F

Material examined. MALAYSIA – Sandakan • Maliau Basin, Gunung Rara Forest Reserve, 2.5 km above main Maliau Falls, in mixed dipterocarp forest over sandstone; ca. 530 m elev.; Herscovitch s,n. (holo NWS, spirit coll.). Identification. Amorphophallus venustus is doubtless a close ally of A. manta Hett. & Ittenbach (Sumatra) , A. bufo Ridl. (W. Malaysia) , and A. sparsiflorus Hook. f. (W. Malaysia), with which it shares the unique linguiform

spathe with its peculiar strongly dorsally curved margin above the base. Amorphophallus venustus differs mostly from all of these species by the silver variegation along the main veins of the leaflets, the presence of verrucae on the appendix, and the appendix itself being quite thin and creamish (vs. dark glossy purple and inflated in the other species). The peculiar colour and variegation of the leaflets of A. venustus is only shared wih A. pendulus Bogner & Mayo ( Sarawak) , a species also closely allied to the species group mentioned above ( Hetterscheid and van der Ham 2001).

Distribution and ecology. Endemic to Sabah. Sepilok, Maliau Basin, Gunung Rara mixed dipterocarp forest and sandstone. In secondary forest on sandstone, in deep shade, ca. 450 m elev.

Amydrium medium (Zoll. & Moritzi) Nicolson Material examined. MALAYSIA – Pedalaman • Keningau, Hutan Simpan Trus Madi , lower montane forest; 05°30′21″N, 116°34′47″E; 689 m elev.; 28 October 2011; Pius G. SAN 154012 ( SAN) • Keningau, Pisagon , along the riverside; 05°N, 116°15′E; 23 June 1989; Fidi- lis & Sumbing SAN 127663 ( SAN) • Keningau, Pisagon, Growth along the riversides; 05°N, 116°15′E; 16 Janu- ary 1990; Sumbing J. SAN 128253 ( SAN) • Keningau, Ulu Sungai Blassanon KM 22 Jalan Keningau , along the riversides; 04°55′13″N, 116°29′31″E; 11 August 2019; Fidilis K. SAN 128195 ( SAN) • Nabawan, Sungai Milian ; 04°59′58″N, 116°29′56″E; November 1986; Sumb- ing J. SAN 118663 ( SAN) • Nabawan, Syarikat Undan Sdn Bhd logging area, KM18 Jalan Nabawan / Pandewan ; 04°55′13″N, 116°29′31″E; 14 March 1990; Sawan T. SAN 128095 ( SAN) • Pensiangan, Kayu Forest Reserve , along the swamp; 25 January 1994; Sumbing J. SAN 136924 ( SAN) • Sipitang, Long Pasia, Bukit Dusun ; 04°27′34″N, 115°44′53″E; 1200 m elev.; 338.33 m (1110 ft.) elev; 27 Jan- uary 2003; Dolois et al. SP 18067 ( SAN) • Sipitang, Lower Sungai Maga, Riverine Forest ; 18 April 2000; S. P. Lim, Postar & Markus SAN 143299 ( SAN) • Sipitang, Southern Eastern, Swamp Forest ; 5°01′35″N, 115°35′19″E; 95 m elev.; 19 May 1990; W. Meijer SAN 130219 ( SAN) • Tambunan, above Kg Sunsuron, hill slope on the trail to Rafflesia Plot ; 05°44′38″N, 116°22′45″E; 18 Novem- ber 1989; Joseph R. & Donggop T. SAN 128641 ( SAN) • same locality; 17 November 1989; Joseph R. & Donggop T. SAN 128636 ( SAN) • Tambunan, Trusmadi Tambahan 2, Syarikat Tinju , hillside; 05°26′47″N, 116°48′15″E; 19 April 1990; Julius Kuli et al. SAN 130201 ( SAN) • Tenom, Bunut ; 05°06′39″N, 115°56′56″E; 300 m elev.; 21 November 1968; K. Ogata 11631 (L) • Tenom, Hutan Simpan Mendalom , lowland; 14 August 1993; Sumbing J. SAN 136117 ( SAN) • Tenom, Lumaku Forest Reserve, Kampung Ulu Bunut , mixed dipterocarp forest; 05°03′94″N, 117°53′66″E; 800 m elev.; 24 March 2010; Suzana et al. SAN 151464 ( SAN) • Tenom, Secondary forest, Agriculture Station ; 05°10′54″N, 115°59′23″E; 15 October 1987; W. Meijer SAN 122497 ( SAN) • Tenom, Ulu Kelang Forest Reserve, Montane Forest ; 05°9′43″N, 115°55′42″E; 18 September 1991; L. Madan et al. SAN 133074 ( SAN) – Pantai Barat • Kota Belud, above Kg Paka , cultivated area; 06°19′42″N, 116°22′33″E; 15 April 1989; Julius K., SAN 124867 ( SAN) • Ranau, Bambangan ; 05°58′30″N, 116°38′45″E; 7 April 1988; Amin G. SAN 121562 ( SAN) • Ranau, Bukit Hampuan Forest Reserve, Oak –Cchesnut forest; 06°00′30″N, 116°39′31″E; 1364 m elev.; 11 May 2010; Pereira, J. T., Pius, G., et al. SAN 151722 ( SAN) • Ranau, Bukit Kulung ; 06°01′26″N, 116°40′18″E; 6 October 1987; W. Meijer SAN 122422 ( SAN) • Ranau, Bundu Tuhan, Kinatongan ; 05°57′57″N, 116°32′46″E; 16 July 1993; Doinis Soibeh DS 293 ( SAN, SNP) • Ranau, Kinabalu ; 06°05′30″N, 116°32′45″E; 1100 m elev.; 12 March 1970; H. P. Nooteboom 1583 (L) • same locality; 914.4 m (3000 ft) elev.; 18 September 1931; Clemens & Clemens 26733 (L) • same locality; 1219 m elev.; 1931; Clemens & Clemens 51420 (L) • Ranau, Lohan Ulu ; 05°46′04″N, 116°49′08″E; 9 November 1987; Amin & Jarius SAN 121417 ( SAN) • Ranau, Sungai Bundu Tuhan , primary forest; 05°58′15″N, 116°31′47″E; 3 Septem- ber 1971; Aban G. SAN 74128 ( SAN) • Ranau, Sungai Mangkadau ; 05°56′54″N, 116°40′01″E; 457.2 m (1500 ft.) elev.; 29 May 1973; G. Shea & Aban SAN 77263 ( SAN) • Ranau, Tenompok Forest Reserve , secondary forest; 05°57′40″N 116°32′18″E; 9 m elev.; 8 September 2016; Suzana et al. SAN 157738 ( KEP, SAN) • Ranau, Tenompok, Mount Kinabalu ; 06°05′30″N, 116°32′45″E; 1524 m elev.; 22 April 1932; Clemens & Clemens 29144 (L) • Ranau, Tenompok ; 05°58′58″N, 116°30′40″E, 1524 elev.; 1931; Clemens, J. & Clemens, M. S., Clemens & Clemens (L) • Ranau, Tontolob , hillside; 05°44′05″N, 116°23′32″E; 18 October 1988; Amin et al., SAN 129318 ( SAN) • Ranau, Ulu Sungai Nabutan ; 05°52′21″N, 116°49′13″E; 20 August 1983; Amin & Dewol SAN 100207 ( SAN) • Ranau, West of Kg Takutan ; 06°05′25″N, 116°46′42″E; 609.6 m (2000 ft.) elev.; 24 May 1973; G. Shea & Aban SAN 77165 ( SAN) – Sandakan • Kinabatangan, Sukau , WWFM small plots; 05°31′47″N, 118°18′09″E; Georgina B. & Reza Azmi GB 210 ( SAR) • Sandakan, Bukit Garam , disturbed forest; 05°30′28″N, 118°13′15″E; 27 February 1987; George et al., SAN 117665 ( SAN) • Sandakan, Jalan Pengakalan Sepilok Forest Reserve ; 05°49′36″N, 117°57′04″E; 16 June 1970; P. P. Sam & De- wol SAN 7029 ( SAN) • Sandakan, Kabili-Sepilok Forest Reserve ; 05°48′36″N, 117°59′21″E; 6 m elev.; 27 May 1937; Keith, H. G., Keith 7160 (L) • Sandakan, Labuk Sugut, Sungai Sasau ; 06°02′05″N, 117°12′13″E; 21 Sep- tember 1984; Sigin & Amin SAN 67562 ( SAN) • Sandakan, Lamag, Ulu Sungai Lokan , logged over area slope; 05°29′51″N, 117°20′03″E; 10 November 1979; Aban & Petrus SAN 90685 ( SAN) • Sandakan, Myburgh Prov. ; 05°52′06″N, 117°55′59″E; 1921; Elmer A. D. E., Elmer 20210 (L) • Sandakan, Sepilok Forest Reserve , 05°49′36″N, 117°57′04″E; 6.096 m (20 ft.) elev.; 15 Au- gust 1970; Patrick L. SAN 66666 ( SAN) • same locality; 15.24 m (50 ft.) elev.; 6 June 1969; P. F. Cockburn, SAN 65619 ( SAN) • Sandakan, Sukau, Keruak Forest Reserve , on rock faces at the base of the hill; 05°31′45″N, 118°17′15″E; 16 September 1996; R. Kiew & Lim S. P., RK 4185 ( SAN) • Telupid, Tangkulap , lowland mixed dipterocarp forest; 04°58′41″N, 116°52′11″E; 103.63 m (340 ft.) elev.; 21 October 2004; John B.S. SAN 119247 ( SAN) • Tongod, Pinangah ; 5°15′12.3″N, 116°50′28.7″E; 180 m elev.; 17 July 1981; Dewol S. SAN 93770 ( SAN) – Tawau • Lahad Datu, Ganduman Forest Reserve, South-East of Kampung Tegupi on flat land; 05°23′31″N, 119°05′11″E; 21.336 m (70 ft.) elev.; 15 September 1975; Saikeh SAN 82352 ( SAN) • Lahad Datu, Tabin Wildlife Sanctuary ; 05°12′N, 118°30′E; 25 February 2009; J. T. Pereira et al. JTP 682 ( SAN) • Lahad Datu, Ulu Sungai Segama ; 04°57′24″N, 117°37′03″E; 200 m elev.; 2 March 1985; Argent et al. SAN 107675 ( SAN) • Tawau , Luasong, SF logging area; 04°36′23″N, 117°24′03″E; 8 August 1977; Fidilis K. SAN 87303 ( SAN) • Tawau, Tanjong Forest Reserve ; 04°49′00″N, 117°55′00″E; 1 April 1964; W. Meijer SAN 42993 ( SAN) .

Identification. An unmistakable aroid liane by virtue of the mature leaves with prominently reticulate venation, perforations and pinnation. Ripe fruits with domed stylar tissue resembling white berries ( Nguyen and Boyce 1999).

Distribution and ecology. Widespread in Sabah. Low to middle elevation humid to wet primary lowland rainforest to disturbed evergreen forest on a variety of substrates; 65–1500 m elev.