Magnolia sect. Talauma subsect. Talauma

Vázquez-García, J. Antonio, Neill, David A., Asanza, Mercedes & Recalde, Luis, 2015, Magnolia vargasiana (Magnoliaceae), a new Andean species and a key to Ecuadorian species of subsection Talauma, with notes on its pollination biology, Phytotaxa 217 (1), pp. 26-34 : 31-32

Key to Ecuadorian species of Magnolia sect. Talauma subsect. Talauma *

1. Carpels 5–20, stamens 20–90.............................................................................................................................................................2

- Carpels 35–135, stamens 105–175.....................................................................................................................................................7

2. Leaves suborbicular, cordate, broadly ovate, rarely broadly elliptic..................................................................................................3

- Leaves elliptic to lanceolate or broadly elliptic..................................................................................................................................4

3. Mature leaf blades 6–11 cm long, outer petals obovate–spathulate and strongly concave ............................... Magnolia vargasiana

- Mature leaf blades 15–22 cm long, outer petals narrowly oblanceolate and slightly concave ............................ Magnolia kichuana

4. Leaf blades at least abaxially pubescent.............................................................................................................................................5

- Leaf blades mostly glabrous or glabrescent in both sides..................................................................................................................6 5. Petals 3–3.3 cm long; fruit 4 cm long, lateral nerves 13–15 per side.................................................................. Magnolia zamorana

- Petals 1.5–2 cm long; fruit 3 cm long, lateral nerves 8–12 per side................................................................... Magnolia palandana

6. Carpels 4–6, stamens 20–25 (Cordillera Llanganates, Ecuador) ................................................................. Magnolia llanganatensis

- Carpels 14–18, stamens 81–87 ............................................................................................................................... Magnolia rimachii

7. Carpels unbeaked................................................................................................................................................................................8

- Carpels strongly beaked at the tip......................................................................................................................................................9

8. Carpels 124–132....................................................................................................................................................... Magnolia dixonii

- Carpels 96–104................................................................................................................................................. Magnolia canandeana

9. Petioles and internodes pubescent, carpels 35–40...................................................................................................... Magnolia neillii

- Petioles and internodes glabrous or glabrescent, carpels 78–122....................................................................................................10

10. Fruit obovoid, mature leaves 28.0–55.0 × 12.0– 26.5 cm; lateral leaf veins per side 10–22............................ Magnolia equatorialis

- Fruit ovoid, mature leaves 16.0–26.0 × 6.0–17.0 cm, lateral leaf veins per side 6–9 ..................................... Magnolia pastazaensis