taxonID	type	description	language	source
160B575DF4BE5D80AA9C0CD9E6B91C99.taxon	description	Figs 1, 2, 3	en	Couvreur, Thomas L. P., Niangadouma, Raoul, Nguimbit, Igor, Paradis, Anne-Hélène, Dagallier, Léo-Paul M. J., Baudoin-Huit, Lola, Collin, Myriam, Haran, Julien M., Droissart, Vincent (2025): Passion and combat on a floral stage: a new species of Uvariopsis (Annonaceae) from Monts de Cristal, Gabon, with notes on its unique pollination ecology. Plant Ecology and Evolution 158 (2): 294-308, DOI: 10.5091/plecevo.152843
160B575DF4BE5D80AA9C0CD9E6B91C99.taxon	diagnosis	Diagnosis Uvariopsis niangadoumae resembles U. korupensis in the shape and dimensions of its leaves and the overall size of the flowers. It differs by having strong scented leaves versus no clear scent in U. korupensis. Furthermore, U. niangadoumae bears no more than two, few-flowered inflorescences on small protrusions at the base of the trunk, whereas in U. korupensis the base of the trunk is densely covered with inflorescences. Flowers of U. niangadoumae have free petals with a length: width ratio between 1.3 and 1.7 vs fused at base and a l: w ratio between 2.2 and 7 in U. korupensis. Uvariopsis niangadoumae also has fewer carpels than U. korupensis (20 – 25 vs 25 – 120).	en	Couvreur, Thomas L. P., Niangadouma, Raoul, Nguimbit, Igor, Paradis, Anne-Hélène, Dagallier, Léo-Paul M. J., Baudoin-Huit, Lola, Collin, Myriam, Haran, Julien M., Droissart, Vincent (2025): Passion and combat on a floral stage: a new species of Uvariopsis (Annonaceae) from Monts de Cristal, Gabon, with notes on its unique pollination ecology. Plant Ecology and Evolution 158 (2): 294-308, DOI: 10.5091/plecevo.152843
160B575DF4BE5D80AA9C0CD9E6B91C99.taxon	description	Description Tree up to 5 m tall, up to 9 cm in diameter at breast height, multi-branched, old branches grey, striate, glabrous; very young branches light green, pubescent; slash light cream with a black ring. Leaves alternate; petiole 3 – 4 mm long, 4 mm in diameter, glabrous, leaf blade inserted on top; lamina 33 – 36 cm × 9 – 10 cm wide, length / width ratio 3.6 to 3.8, elliptic, acuminate, acumen ca 2 cm long, base narrowly cordate, glabrous on both sides, emitting a strong scent with similarities to both mint and thyme, young laminas light green pending; secondary veins 17 to 19, brochidodromous, arching 0.5 to 1 cm from margin, tertiary veins reticulate, slightly visible above and below. Inflorescences cauliflorous at the base up to 1 m high on the main trunk, on small protuberances. Flowers functionally unisexual, monoecious, but with more female flowers than male per individual stem; flower buds conical; male and female flowers similar, but female flowers larger and more robust; female flowering pedicels up to 4 cm long, ca 4 mm in diameter, sparsely covered with hairs less than 1 mm long, one bract present at base of pedicel, 0.5 mm long and wide, soon falling; male flowering pedicel 2 cm long, 2 mm in diameter, glabrous or with sparse hairs less than 1 mm long, bracts not seen, probably soon falling. Female flowers sepals 2, ca 1 × 4 mm wide, orbicular, acuminate, glabrous, green to dark green, slightly reflexed; petals 4, in the same whorl, ca 2 × 1.5 cm wide, ca 5 mm thick, triangular, apex acute, base truncate, outer surface with raised central vein and a network of smaller veins, glabrous with ciliate margins, hairs less than 0.5 mm, pink reddish in vivo, inside surface heavily warty, glabrous, cream to pink in vivo. Floral receptacle ca 1 cm wide, slightly convex. Carpels 20 to 25, 5 mm long, 3 mm in diameter, cream, covered in hairs less than 0.5 mm long, cream; stigma sessile less than 0.5 mm long, glabrous, cream; ovules biseriate. Some female flowers with sterile stamens at the base forming 2 to 10 whorls. Male flowers sepals 2, minute, glabrous; petals 4, sometimes flowers with three petals but rare, ca 1.5 × 0.9 cm wide, ca 3 mm thick, triangular, apex acute, base truncate, free, outer and inner surfaces like female flowers, pink reddish outside in vivo, cream to pink inside in vivo. Receptacle 5 mm in diameter, strongly concave; stamens ca 400, less than 0.5 mm long, cream to light yellow in vivo. Fruiting pedicel ca 3 – 4 cm long, 2 mm in diameter, sparsely pubescent, green. Young monocarps light green, older monocarps darker green, monocarps 1 to 3, ca 4 cm long (3 cm when dried), 2 cm in diameter (1.5 cm when dried), surface smooth, glabrous; immature seeds biseriate, 5 per side. Hilum and raphe not seen.	en	Couvreur, Thomas L. P., Niangadouma, Raoul, Nguimbit, Igor, Paradis, Anne-Hélène, Dagallier, Léo-Paul M. J., Baudoin-Huit, Lola, Collin, Myriam, Haran, Julien M., Droissart, Vincent (2025): Passion and combat on a floral stage: a new species of Uvariopsis (Annonaceae) from Monts de Cristal, Gabon, with notes on its unique pollination ecology. Plant Ecology and Evolution 158 (2): 294-308, DOI: 10.5091/plecevo.152843
160B575DF4BE5D80AA9C0CD9E6B91C99.taxon	distribution	Distribution Endemic to Gabon, Monts de Cristal National Park.	en	Couvreur, Thomas L. P., Niangadouma, Raoul, Nguimbit, Igor, Paradis, Anne-Hélène, Dagallier, Léo-Paul M. J., Baudoin-Huit, Lola, Collin, Myriam, Haran, Julien M., Droissart, Vincent (2025): Passion and combat on a floral stage: a new species of Uvariopsis (Annonaceae) from Monts de Cristal, Gabon, with notes on its unique pollination ecology. Plant Ecology and Evolution 158 (2): 294-308, DOI: 10.5091/plecevo.152843
160B575DF4BE5D80AA9C0CD9E6B91C99.taxon	etymology	Etymology This species is dedicated to the Gabonese botanist Raoul Niangadouma who participated in the (long and arduous) botanical inventories that led to the official recognition of the Monts de Cristal National Park. Raoul Niangadouma is also one of the collectors of the type specimen of this species.	en	Couvreur, Thomas L. P., Niangadouma, Raoul, Nguimbit, Igor, Paradis, Anne-Hélène, Dagallier, Léo-Paul M. J., Baudoin-Huit, Lola, Collin, Myriam, Haran, Julien M., Droissart, Vincent (2025): Passion and combat on a floral stage: a new species of Uvariopsis (Annonaceae) from Monts de Cristal, Gabon, with notes on its unique pollination ecology. Plant Ecology and Evolution 158 (2): 294-308, DOI: 10.5091/plecevo.152843
