| Habit | Trees 6–10 m | Trees (2–)3.5–7(–8) m |
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| Indumentum of branches and petioles | Velutinous, branches glabrescent | Densely villous to velutinous turning white-pubescent near the apex |
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| Petiolar nectary | Fusiform, usually immersed, sometimes slightly prominent, darkened, 3–4 × 0–0.5 mm | Verruciform with an elongated base, 2.5–3.5 × 0.5–1(–1.5) mm |
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| Number of pairs of pinnae | (6–)9–10 | (7–)9–15 |
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| 2nd degree petiolule length | 0.2–0.3 mm | 0.5–1 mm |
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| Indumentum of leaflets | Canescent, densely villous to sericeous on both surfaces | Subglabrous to sparsely villous at the upper surface, lower surface sparsely pubescent to villous, rarely densely villous |
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| Unilateral tuft of trichomes on the lower surface | Present, usually prolonged up to the 4th or 5th pairs of secondary nerves | Present, usually prolonged up to the 3rd pairs of secondary nerves |
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| Calyx indumentum | Hirsute at the upper half at the lobes or ciliate only at the apex | Glabrous, sparsely ciliate at the apex of the lobes |
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| Corolla indumentum | Glabrous or hirsute only at the apex of the lobes | Glabrous |
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| Ovary indumentum | Glabrous | White-pulverulent to white-pubescent |
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| Prophylls | Late deciduous, densely yellow-tomentose and ferruginous-pulverulent | Early deciduous, villous |
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