Table 1. Characters separating Pseudohydrosme gabunensis from Pseudohydrosme ebo and Pseudohydrosme buettneri.

	Pseudohydrosme gabunensis	Pseudohydrosme ebo	Pseudohydrosme buettneri
Leaf lobe posture and surface	Pendulous, surface bullate (convex between nerves)	Horizontal, surface flat	Unknown
Spadix male: female zone width	Base of male zone abruptly wider than female zone below	Male zone about as wide as female zone	Male zone about as wide as female zone
Spathe length (cm)	(30–)40–55(–70)	24–30(–34.5)	80
Spathe tube: colour of outer surface	Uniformly yellow (or white)	Vertical broad pink-brown stripes on white background	Unknown
Spathe blade: colour of inner surface	Yellow or white around margins, central area dark red-purple. Demarcation abrupt	Light reddish brown to pink with pale green veins, gradually slightly darkening in the central area	Unknown
Number of ovary locules and stigma lobes	2 (–3)	(2–) 3	2
Female flower density	Covering completely the female zone spadix axis	Lax (sparse), spadix axis visible between the female flowers	Covering completely the female zone spadix axis
Female and male flower zone contiguity	Female and male zones contiguous, male and female flowers in contact with each other	Female zone separated from male zone by a short naked portion of spadix axis	Female and male zones contiguous, male and female flowers in contact with each other

Notes:

Data for Pseudohydrosme gabunensis from Bogner (1981:33), Hetterscheid & Bogner (2013:104–113), Hay (in litt.), and live material cultivated at Royal Botanic Gardens, Kew.