Achariaceae

Eleutherandra Slooten

Possibly present

1. Eleutherandra pes-cervi Slooten, Bull. Jard. Bot. Buitenzorg ser. 3, 7 (1925) 329. Distribution: Borneo, ?Philippines, Sumatra. ?SAMAR. Notes: Note by P.B. Pelser & J.P. Collantes (14-Aug-20): PPI 24198 Reynoso & Majaducon (L) possibly represents this species in the Philippines.

Erythrospermum Lam.

Incertae sedis

1. Erythrospermum sp.; Soejarto et al., Prelim. Checklist Fl. Pl. Palawan (1995); Voucher: Soejarto 7683 (A, F, PNH), Palawan: Mt Capoas, NE foot. Distribution: PALAWAN. Native.

Hydnocarpus Gaertn.

1. Hydnocarpus alcalae C.DC., PJS 11 c (1916) Bot. 37; EPFP 3 (1923) 107; Sleumer, Fl. Males. ser. 1, 5 (1954) 25. Distribution: Endemic to the Philippines. LUZON: Albay, Laguna. Notes: Low elevation forests. Cultivated and naturalized in Laguna (Mt Makiling). Conservation status: Other Threatened Species (DAO 2017-11). Native.
2. Hydnocarpus cauliflorus Merr., PJS 9 c (1914) Bot. 323, as 'cauliflora'; EPFP 3 (1923) 107; Sleumer, Fl. Males. ser. 1, 5 (1954) 25. Distribution: Endemic to the Philippines. MINDANAO: Cotabato. Notes: Low elevation primary dipterocarp forest. Native.
3. Hydnocarpus heterophyllus Blume, Rumphia 4 (1848) 22, as 'heterophylla'; Sleumer, Fl. Males. ser. 1, 5 (1954) 20. Distribution: BUSUANGA, DINAGAT, LEYTE, LUZON: Camarines, Sorsogon, MASBATE, MINDORO, NEGROS, PALAWAN, PANAY, SAMAR, TABLAS, TICAO. Native.
   • ssp. philippinensis Sleumer, Bot. Jahrb. 69 (1938) 20; Fl. Males. ser. 1, 5 (1954) 20. = Taraktogenos heterophylla auct. non (Blume) Slooten; Merr., EPFP 3 (1923) 108. = Cyclostemon iwahigensis Elmer, LPB 4 (1911) 1278. Distribution: Philippines, Sulawesi. BUSUANGA, DINAGAT, LEYTE, LUZON: Camarines, Sorsogon, MASBATE, MINDORO, NEGROS, PALAWAN, PANAY, TABLAS, TICAO. Notes: Low elevation forests. Native.
4. Hydnocarpus polypetalus (Slooten) Sleumer, Bot. Jahrb. 69 (1938) 62, as 'polypetala'; Fl. Males. ser. 1, 5 (1954) 31; Soejarto et al., Prelim. Checklist Fl. Pl. Palawan (1995); ≡ Taraktogenos polypetalum Slooten, Bijdr. Combret. Flacourt. Ned.-Ind. (1919) 74. Distribution: Borneo, Philippines, Sumatra. PALAWAN. Notes: Lowland to medium elevation primary forest. Native.
5. Hydnocarpus subfalcatus Merr., PJS 4 c (1909) Bot. 297, as 'subfalcata'; EPFP 3 (1923) 107; Sleumer, Fl. Males. ser. 1, 5 (1954) 22. = Hydnocarpus ovoideus Elmer, LPB 4 (1912) 1514, as 'ovoidea'; Type: Elmer 12410, Sibuyan: Magallanes, Mt Giting-giting, May-1910. = Hydnocarpus quadrasii Elmer, LPB 4 (1912) 1515; Merr., EPFP 3 (1923) 107; Type: Elmer 12085, Sibuyan: Magallanes, Mt Giting-giting, Mar-1910. Distribution: Borneo, Philippines, Sumatra. LUZON: Aurora, Cagayan, Isabela, Pangasinan, Quezon, Zambales, MINDANAO: Misamis Occidental, Surigao, SAMAR, SIBUYAN. Notes: Low elevation thickets and forests, on non-inundated level ground. Native.
6. Hydnocarpus sumatranus (Miq.) Koord., Exk. Fl. Jav. 2 (1912) 631, as 'sumatrana'; Sleumer, Fl. Males. ser. 1, 5 (1954) 27; ≡ Bergsmia sumatrana Miq., Fl. Ind. Bat. Suppl. (1860) 159. = Hydnocarpus hutchinsonii Merr., PJS 17 (1920) 291; EPFP 3 (1923) 107. Distribution: Borneo, Java, Philippines, Sulawesi, Sumatra. BASILAN, LUZON: Laguna, MINDANAO: Zamboanga, Zamboanga Sibugay, MINDORO, ?PALAWAN, TAWI-TAWI. Native.
   • var. sumatranus. Distribution: Borneo, Java, Philippines, Sulawesi, Sumatra. BASILAN, MINDANAO, TAWI-TAWI. Notes: Rainforests, never in inundated areas, on sandy or clayey soil and hilly or steep ground, elevation 30-200m. Native.
   • var. pentagynus (Slooten) Sleumer, Bot. Jahrb. 69 (1938) 52, as 'pentagyna'; Fl. Males. ser. 1, 5 (1954) 28; ≡ Hydnocarpus pentagynus Slooten, Bijdr. Combret. Flacourt. Ned.-Ind. (1919) 64. = Hydnocarpus palawanensis Merr. & Quisumb., PJS 82 (1953) 330. Distribution: ?Borneo, ?Philippines, Sumatra. ?PALAWAN. Notes: Known with certainty only from a single collection from Sumatra. Very similar but not quite identical specimen have been found in Palawan in Puerto Princesa (PNH 192 Edano). This was described as Hydnocarpus palawanensis Merr. & Quisumb. Similar materials have also been found in Borneo (Sarawak and Mt Kinabalu).

Pangium Reinw.

1. Pangium edule Blume ex Reinw., Syll. Pl. Nov. ii. (1828) 12; Blume, Cat. Gew. Buitenz. (1823) 112, nom. inval., nom. nud.; Merr., EPFP 3 (1923) 108; Sleumer, Fl. Males. ser. 1, 5 (1954) 35. Distribution: Bismarck Arch, Borneo, Java, Lesser Sunda Isls, Malay Peninsula, Moluccas, New Guinea, Nicobar Isls, Pacific Ocean, Solomon Isls, Sulawesi, Sumatra. CAMIGUIN, CEBU, LEYTE, LUZON: Camarines, Camarines Sur, Sorsogon, MINDANAO: Davao del Sur, Lanao del Sur, MINDORO, NEGROS, PALAUI, PALAWAN, PANAY, SAMAR. Notes: Primary and secondary forests at low and medium elevation. Native.

Ryparosa Blume

1. Ryparosa cauliflora Merr., PJS 9 c (1914) Bot. 325; EPFP 3 (1923) 109; Sleumer, Fl. Males. ser. 1, 5 (1954) 42. Distribution: Endemic to the Philippines. LUZON: Camarines Norte, MINDANAO: Surigao, TINAGO. Notes: Forests at low elevation. Native.
2. Ryparosa hullettii King, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 59 (1890) 126. Distribution: Borneo, Malay Peninsula, Philippines. PANAY. Notes: Known for the Philippines from Mt Poras: Reynoso 21076. Native.

Possibly present

1. Ryparosa fasciculata King, J. Asiat. Soc. Bengal, Pt. 2, Nat. Hist. 59 (1890) 127. Distribution: Malay Peninsula, ?Philippines, Thailand. ?PALAWAN.

Trichadenia Thwaites

1. Trichadenia philippinensis Merr., PJS 4 c (1909) Bot. 298; EPFP 3 (1923) 108; Sleumer, Fl. Males. ser. 1, 5 (1954) 39. = Vitex curtifrutescens Elmer, LPB 8 (1915) 2873; Bramley, Fl. Males. ser 1, 23 (2019) 421; Type: Elmer 10994 (PNH, holo; E, K, L, NY, iso), Mindanao: Todaya (Mt Apo), Jul-1909. Distribution: Moluccas, New Guinea, Philippines, Solomon Isls, Sulawesi. LUZON: Camarines, Isabela, Laguna, Nueva Ecija, Pangasinan, Quezon, Rizal, Sorsogon, MINDANAO: Davao, Davao del Sur, Lanao, Misamis Occidental, NEGROS, PANAY, SAMAR, SIBUYAN. Notes: Low elevation primary or old secondary forests, on flat or hilly but non-inundated places, ascending to 500m. Native.