Plukenetia

KEY TO THE SPECIES Of PLUKENETIA View in CoL SECT. PLUKENETIA View in CoL

1. Styles (9–) 15–35 mm long; filaments short-conical,; 0.5 mm long; interstaminal nectaries absent............................... 25. P. volubilis View in CoL 1. Styles 4–12 mm long; filaments slender-cylindrical, 0.5–3 mm long; interstaminal nectaries present (small and sometimes overlooked in P. stipellata View in CoL )..... 2 2. Fruits 1.6–3 cm in diam, dry; interstaminal nectaries of small irregularly shaped segments; stipels 2 and glandular knob absent adaxially at petiole

apex.......................................................................................................... 23. P. stipellata View in CoL

2. Fruits 2.5–11 cm in diam, dry or fleshy; interstaminal nectaries slender-cylindrical, ligulate (strap-shaped), or large irregularly shaped segments;

stipels 0–2 and glandular knob 0 or 1 adaxially at petiole apex.................................................................... 3

3. Interstaminal nectaries of large irregularly shaped segments; leaves: lateral primary veins arching towards the margins # 1/2 the length of the

blade, stipels 1–2 and glandular knob absent adaxially at petiole apex; typically growing in montane rainforest (580–) 1280–2440 m ...... 4

4. Fruits 2.8–3.7 cm in diam, seeds “large,” 19.2–19.6 3 17–18.5 3 13–15.7 mm; distributed in central and southern Peru (Cusco, Jun´ ın,

Pasco)................................................................................................. 24. P. sylvestris

4. Fruits 4–10 cm in diam, seeds “extra-large,” 27–50 3 25–40 3 15–35 mm; distributed in northern Peru (Amazonas, Cajamarca)...... 5

5. Filaments 0.5–1 (perhaps to;1.8, see species discussion) mm long; stamens 25–35; staminate cymules densely packed on inflorescence,

axis not clearly visible.............................................................................. 19. P. carolis-vegae View in CoL

5. Filaments; 0.5 mm long; stamens 10–15; staminate cymules loosely packed on inflorescence, axis clearly visible................

............................................................................................ 20. P. 3 huayllabambana View in CoL

3. Interstaminal nectaries slender-cylindrical or ligulate (strap-shaped); leaves: lateral primary veins arching towards the apex $ 1/2 the length of

the blade, stipels absent and glandular knob 1 adaxially at petiole apex; growing in lowland to pre-montane rainforest 0–1000 m (montane

rainforest to 2100 m in P. lehmanniana View in CoL )..................................................................................... 6

6. Styles 20–40% connate, column 3–6 mm long, free style arms 3–6 mm long; fruits squarish in profile; distributed north and west of the Andes

in the Pacific coastal and montane regions of Colombia and Ecuador.......................................... 21. P. lehmanniana View in CoL

6. Styles 70–95% connate, column 3–14 mm long, free style arms 1–2.5(3) mm long; fruits ovoid in profile; distributed south and east of the

Andes in the Amazon basin, the Guianas, and eastern Venezuela, or in southern Mexico....................................... 7

7. Seeds broadly lenticular, “large” to “extra-large,” 24–27 3 21–27 3 14–16 mm; fruits capsules 5.8–7 cm in diam, at least semi-dehiscent;

styles 12–14 mm long; distributed in southern Mexico.................................................... 18. P. carabiasiae View in CoL

7. Seeds ovoid, “maximum” sized, 49–56 3 33–37 3 30–36 mm; fruits fleshy berries, 5–11 cm in diam, indehiscent; styles 3–8 mm long;

distributed in the northern Amazon basin, the Guianas, and eastern Venezuela............................... 22. P. polyadenia View in CoL