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| [C, D] Meiogyne stenophylla M.F.Liu & Munzinger flower and fruit,; [E, F] Meiogyne wilsonii (Guillaumin) M.F.Liu & Munzinger flower and early developing fruit. [A] Adaxial inner petal outgrowth of Meiogyne saundersii Junhao Chen & M.F.Liu; [B] Adaxial inner petal outgrowth of M. cylindrocarpa (Burck) Heusden; in Liu, Munzinger et Chen, 2026. Scale bars: 1 mm. Photos: A, B. J. Chen; C–F. J. Munzinger. |
Abstract
Two new species of Meiogyne (Annonaceae) are described from Malesia based on morphological evidence and the results of a recent molecular phylogenetic study: Meiogyne saundersii from Peninsular Malaysia, Sumatra, and Borneo, and Meiogyne stenophylla from New Guinea. Meiogyne saundersii is morphologically similar to M. cylindrocarpa but differs in its leaf apex (abruptly caudate vs. acute, rarely shortly acuminate) and inner petal corrugation (tentacular vs. weakly longitudinally grooved). Meiogyne stenophylla is unique in the genus in its extremely narrow leaves (< 2 cm wide) with an attenuate apex; it is also similar to M. cylindrocarpa but differs in its lanceolate (vs. broadly ovate) petals and weakly warty (vs. weakly longitudinally grooved) outgrowth on the adaxial surface of the inner petals. In addition, two new combinations are proposed, Meiogyne wilsonii and Monoon papuanum, based on the results of the most recent molecular phylogeny of Meiogyne and related genera.
Key words: Annonaceae, Borneo, Meiogyne cylindrocarpa, New Guinea, Vanuatu
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| A. Adaxial inner petal outgrowth of Meiogyne saundersii Junhao Chen & M.F.Liu (C. Hansen 1511); B. Adaxial inner petal outgrowth of Meiogyne cylindrocarpa (Burck) Heusden (Thomas 3418); C, D. Meiogyne stenophylla M.F.Liu & Munzinger (Munzinger et al. 6945) flower and fruit, reproduced from Munzinger et al. (2020); E, F. Meiogyne wilsonii (Guillaumin) M.F.Liu & Munzinger (Munzinger et al. 3589) flower and early developing fruit. Scale bars: 1 mm. Photos: A, B. J. Chen; C–F. J. Munzinger. |
Meiogyne saundersii Junhao Chen & M.F.Liu, sp. nov.
Meiogyne stenophylla M.F.Liu & Munzinger, sp. nov.
Meiogyne wilsonii (Guillaumin) M.F.Liu & Munzinger, comb. nov.
Monoon papuanum (I.M.Turner & Utteridge) M.F.Liu & Junhao Chen, comb. nov.
Ming-Fai Liu, Jérôme Munzinger and Junhao Chen. 2026. Two New Meiogyne Species from Malesia and New Combinations in Meiogyne and Monoon (Annonaceae) in the Asia-Pacific Region. PhytoKeys. 272: 21-36. DOI: doi.org/10.3897/phytokeys.272.175385 [20 Mar. 2026]