Table 1. Differential characters separating Uvariopsis dicaprio, U solheidii, U. korupensis and U.submontana. Data for Uvariopsis solheidii taken mainly from Couvreur et al. (in press) and Cheek, Harvey & Onana (2011), for Uvariopsis korupensis Gereau & Kenfack (2000), and for Uvariopsis submontana (Kenfack et al., 2003).

Character	Uvariopsis solheidii	Uvariopsis dicaprio	Uvariopsis korupensis	Uvariopsis submontana
Indumentum of stem, petiole and abaxial midrib	Tomentose	Glabrous	Appressed pubescent	Appressed pubescent
Leaf-blade dimensions (cm)	16.6–29 × 5–9.5	17.7–20.3 (–23) × (6.4–) 7–7.9	30–52 × 9–14	6–38 × 5–11
Number of secondary nerves on each side of midrib	8–13	5–8 (–9)	13–20	9–18
Number of flowers per inflorescence	1–3	(1 –)4–7	2–3	6–50
Flower shape (mature bud)	Ovoid-conic	Ovoid-conic to pyramidal	Ovoid-conic to pyramidal	Ovoid-conic to pyramidal
Petal colour	Wine brown	Yellow-green	Pink-purple	Pink-Purple
Petal dimensions (mm)	7–10 × 2.5–5	(14–)16 × (5.5–) 9	10–25 × 5–10	7–15 × 5–7
Petal texture	Thick, fleshy	Thin, leathery	Thick, fleshy	Thick, fleshy
Inner surface petals	Tuberculate?	Smooth	Tuberculate	Tuberculate
Outer surface petals	Appressed-pubescent	Mostly naked, hairs few, widely scattered	Appressed-pubescent	Appressed-pubescent
Petals at base	Free	Free	United	United