Vochysia sect. Pachyantha, Ducke, 1938

Shimizu, Gustavo Hiroaki & Gonçalves, Deise Josely Pereira, 2022, Vochysia sobralii (Vochysiaceae), a new species from Serra do Cachimbo, Pará, Brazil, and updated keys for Vochysia sect. Pachyantha, Phytotaxa 542 (2), pp. 207-213 : 210-211

Identification key for species of Vochysia sect. Pachyantha

1. Leaves opposite ..................................................................................................................................................................................2

- Leaves verticillate...............................................................................................................................................................................6

2. Flower buds smaller than the spur; spur inflated................................................................................................... Vochysia rufescens

- Flower buds larger than the spur; spur slender...................................................................................................................................3

3. Stipules 0.1–0.2 cm long; leaves oblong to broadly elliptic; spur straight or S-shaped........................................... Vochysia pinkusii

- Stipules> 0.3 cm long; leaves elliptic; spur recurved........................................................................................................................4

4. Leaves 7–12 cm long.................................................................................................................................... Vochysia steyermarkiana

- Leaves 13.5–19 cm long.....................................................................................................................................................................5

5. Leaf base cuneate ..................................................................................................................................................... Vochysia sobralii

- Leaf base obtuse or rounded........................................................................................................................................ Vochysia sofiae

6. Leaves almost sessile to petioles up to 1 cm long..............................................................................................................................7

- Petioles 1.1–1.8 cm long ..................................................................................................................................................................10

7. Stipules 0.8–1.2 cm long ..................................................................................................................................... Vochysia kosnipatae

- Stipules 0.2–0.3 cm long ....................................................................................................................................................................8

8. Leaves in 3-merous whorls..................................................................................................................................... Vochysia leguiana

- Leaves in 4-merous whorls.................................................................................................................................................................9

9. Leaves elliptic; spur inflated .............................................................................................................................. Vochysia pachyantha

- Leaves spatulate to subspatulate; spur slender .......................................................................................................... Vochysia stafleui

10. Leaves in 4–9-merous whorls; leaf apex rounded..................................................................................................... Vochysia jonkeri

- Leaves in 3-merous whorls; leaf apex abruptly and shortly acuminate or cuspidate.......................................................................11

11. Leaves 10–13 cm long; leaf base obtuse; spur straight or S-shaped ........................................................................ Vochysia pinkusii

- Leaves 13.5–19 cm long; leaf base cuneate; spur recurved ..................................................................................... Vochysia sobralii