Apocynaceae

Takeuchi, Wayne, 2012, Additions to the flora of the southern mountains of Papua New Guinea: Begonia chambersiae sp. nov. (Begoniaceae), Kibara renneriae sp. nov. (Monimiaceae), and distributional records of four rarely seen taxa, Phytotaxa 52 (1), pp. 43-53 : 48

Apocynaceae

Alyxia pugio Markgraf (1927: 182) . Type:— PAPUA NEW GUINEA: East Sepik Province ('Sepikgebiet'): Lordberg (ca. 4°52'S, 142°31'E), mossy montane forest, 1000 m, 1 December 1912, Ledermann 9941 (holotype B, lost; lectotype [designated by Middleton 2000: 94] L; isolectotype WRSL). Fig. 5 .

Additional specimen examined: — PAPUA NEW GUINEA. Southern Highlands Province: Strickland drainage, Tualapa bivouac, limestone forest along fast-flowing stream, 5°17'07"S, 142°29'44"E, 1050 m, 18 July 2008, Takeuchi & Ama 24205 ( A!, LAE!, and 6 undistributed duplicates!) .

Alyxia pugio Markgraf (1927: 182) is a rarely-seen vine historically recorded from two localities: Lordberg (at the headwaters of the April River; Fig. 3 : F), and Mt. Bosavi of Southern Highlands Province ( Middleton 2000, 2007; Fig. 3 : G). The latest collection site ( Fig. 3 : D) is from limestone environments 45 km S of Lordberg and 140 km N of Mt. Bosavi.

Figures

FIGURE 3. Island of New Guinea. Collection localities. A, Muller Range, type locality for Begonia chambersiae; B, Lakekamu, type locality for Kibara renneriae; C, Wabo; D, Tualapa; E, Juha North; F, Lordberg; G, Mt. Bosavi; H, Dieni; I, Kiunga; J, Mt. Amdutakin. Overlay (shaded area) shows distribution of the southern karst formations. A–E from the author's recent collections; F–J from historical localities of earlier collectors.

FIGURE 5. Alyxia pugio. A, fruits single or 2-moniliform; B, leaf-blades are distinctively linear-elliptic with attenuate apices. A–B from Takeuchi & Ama 24205.