Simaba sect. Grandiflorae, Engler, 1874

Devecchi, Marcelo Fernando & Pirani, José Rubens, 2015, A new species of Simaba sect. Grandiflorae (Simaroubaceae) from Jalapão region, Tocantins, Brazil, Phytotaxa 227 (2), pp. 167-174 : 172-173

Key to the species of Simaba sect. Grandiflorae

1. Shrubs with a thick underground system and a few short aerial branches; leaflet apical gland not conspicuously developed; ovary tomentose............................................................................................................................................................................................2

- Shrubs or treelets with a conspicuous, long aerial stem; apical gland present at the apex, conspicuously developed and visible to the naked eye; ovary villous to velutinous.........................................................................................................................................3

2. Leaflet abaxial surface glabrous; petals 2.1–2.5 cm long; adnate portion length of the filament appendage relative to the free portion 6:1; gynophore 2.4–2.9 mm long ( Brazil: Tocantins) ................................................................................................ S. tocantina

- Leaflet abaxial surface with trichomes along the midvein region; petals 3.1–3.5 cm long; adnate portion length of the filament appendage relative to the free portion 10:1 or more; gynophore 1.6–2 mm long ( Brazil: São Paulo and Mato Grosso do Sul) ............ ............................................................................................................................................................................................. S. salubris

3. Leaf rachis length relative to the petiole 2:1; leaflets opposite, completely glabrous or with trichomes only along the midvein region on both surfaces; gynophore 2.6–2.7 mm long.......................................................................................................................4

- Leaf rachis length relative to the petiole 1:1; leaflets opposite to subopposite, with trichomes scattered all over both surfaces; gynophore 1.2–1.6 mm long (eastern Paraguay; central and northeastern Brazil) .......................................................... S. trichilioides

4. Leaves with 7–14 pairs of leaflets; Leaflets with trichomes along the midvein region on abaxial surface; adnate portion length of the filament appendage relative to the free portion 4:1......................................................................................................................5

- Leaves with up to 4 pairs of leaflets; Leaflets completely glabrous on both surfaces; adnate portion length of the filament appendage relative to the free portion 2:1 ( Brazil: Pará and Tocantins)....................................................................................... S. pohliana

5. Treelets; surface of petiolule rugose; apex of the leaflets with a gland conspicuously developed and visible to the naked eye (widely distributed in tropical northern and eastern South America)................................................................................................. S. cedron

- Shrubs; surface of petiolule smooth; leaflet apical gland not conspicuously developed ( Brazil: Rio de Janeiro)............... S. maiana