Talbotiella couteronii (Leguminosae: Detarioideae), a new gregarious tree species from Cameroon Author Sonké, Bonaventure 0000-0002-4310-3603 Plant Systematics and Ecology Laboratory, Higher Teachers’ Training College, University of Yaoundé I, Yaoundé, Cameroon & International Joint Laboratory DYCOFAC, IRD-UYI-IRGM, Yaoundé, Cameroon & Africa and Madagascar Department, Missouri Botanical Garden, Saint Louis, Missouri, USA & Herbarium et Bibliothèque de Botanique africaine, Université Libre de Bruxelles, Brussels, Belgium Author Simo-Droissart, Murielle 0000-0001-6707-8791 Plant Systematics and Ecology Laboratory, Higher Teachers’ Training College, University of Yaoundé I, Yaoundé, Cameroon & AMAP Lab, IRD, CIRAD, CNRS, INRA, Université de Montpellier, Montpellier, France Author Bidault, Ehoarn 0000-0001-5029-8069 Africa and Madagascar Department, Missouri Botanical Garden, Saint Louis, Missouri, USA & Institut de Systématique, Évolution, et Biodiversité (ISYEB), Muséum National d’Histoire Naturelle, Centre National de la Recherche Scientifique, Sorbonne Université, École Pratique des Hautes Études, Université des Antilles, Paris, France. Author Ngoula, Fernandez https://orcid.org/0009-0003-2614-6454 Plant Systematics and Ecology Laboratory, Higher Teachers’ Training College, University of Yaoundé I, Yaoundé, Cameroon Author van der Burgt, Xander M 0000-0003-2712-3433 Royal Botanic Gardens, Kew, Richmond, UK text Plant Ecology and Evolution 2024 2024-11-27 157 3 407 416 journal article 305508 10.5091/plecevo.133256 67ac6656-6f29-4220-aaa0-4ed5c0dd47ad

Table 1. Leaf characteristics of the 10 species of Talbotiella. The species are sorted by number of leaflet pairs. Leaflet length and leaflet width were measured on the largest pair of leaflets because leaflet size varies considerably depending on the position of the leaflet. Adapted from Table 1 in Mackinder et al. (2010 b); the leaflet characteristics were now measured only on leaves of fertile branches; and the measurements of several newly determined collections are included.

Talbotiella species	No. of leaflet pairs	Leaflet length (mm)	Leaflet width (mm)	Distribution	Altitude
T. breteleri	2 (– 3)	35–95	16–35	Cameroon, Central Region	900–1200 m
T. gentii	4–7	15–24	7–11	Ghana	70 – 350 m
T. couteronii	5–10	13–23	5–9	Cameroon, Central and Littoral Regions	320–420 m
T. ebo	8–11	25–38	7–10	Cameroon, Southwest and Littoral Regions	100–900 m
T. batesii	9–13	12–19	4–5	Cameroon, South Region; Gabon, Congo (Brazzaville)	500–900 m
T. cheekii	9–14	12–20	4–6	Guinea	100 – 600 m
T. eketensis	12–16	9–15	3–4	Nigeria	0 – 100 m
T. velutina	14–20	14–22	3–6	Cameroon, Southwest Region	50–100 m
T. korupensis	16–22	16–30	5–8	Cameroon, Southwest Region	50–600 m
T. bakossiensis	21–27	8–14	2–3	Cameroon, Southwest and Littoral Regions	100–1350 m