Pinus, Linnaeus (1753:, 1000

Pérez De La Rosa, Jorge A. & Gernandt, David S., 2017, Pinus vallartensis (Pinaceae), a new species from western Jalisco, Mexico, Phytotaxa 331 (2), pp. 233-242 : 239

Key to the species of Pinus subsection Australes in Jalisco

1. Fascicle sheaths early or late deciduous, falling before the leaves....................................................................................................2

- Fascicle sheaths persistent, falling with the leaves............................................................................................................................5

2. Leaves> 1 mm wide, in fascicles of 3...............................................................................................................................................3

- Leaves <1 mm wide, most in fascicles of 5 (rarely fewer)...............................................................................................................4

3. Leaves (15–) 20–30 cm × 1.2–1.5 mm, vertically pendulous, seed cones ovoid-conical ................................................. P. lumholtzii

- Leaves (4–)6–12(–14) cm × 0.9–1.3 mm, seed cones ovoid....................................................................................... P. chihuahuana

4. Leaves 6–15 cm × 0.5–0.9 mm, seed cones opening wide (90°) ..................................................................................... P. leiophylla

- Leaves 9–15 cm × 0.9–1 mm, seed cones opening slightly (<90°).................................................................................. P. georginae

5. Leaves mostly in fascicles of 3...........................................................................................................................................................6

- Leaves mostly in fascicles of 5...........................................................................................................................................................7

6. Leaves 15–20 cm × 0.7–0.9 mm, seed cones ovoid-elongate or conical ........................................................................... P. herrerae

- Leaves 17–28.5 cm × 1.3–1.9 mm, seed cones ovoid ...................................................................................................... P. luzmariae

7. Leaves lax or rarely rigid, <1 mm wide, seed cones (2.2–) 2.5–7.3 cm long ................................................................................... 8

- Leaves rigid, (17.5–) 19–30 cm × 1.0– 1.7 mm, seed cones 4–7(–9) cm long .................................................................. P. oocarpa

8. Leaves 10–16 cm × 0.5–0.8 mm, seed cone peduncles 1.5–4.5 cm long .................................................................. P. praetermissa

- Leaves 14–20 cm × 0.6–0.9 mm, seed cone peduncles 0.7–1.8 cm long ......................................................................................... 9

9. Leaves 14–18 cm × 0.6–0.7 mm, seed cones 5.5–7.3 cm long ....................................................................................... P. jaliscana

- Leaves (12–)17–20(–22) cm × 0.8–0.9 mm, seed cones (2.2–)2.5–3(4.0) cm long .................................................... P. vallartensis