Morphological Variation and Ecological Structure of Iroko (Milicia excelsa Welw. C.C. Berg) Populations across Different Biogeographical Zones in Benin

Table 1

Sample-size geographical locations and ecological characteristics of iroko populations sites.

Populations	Geographical coordinates		Soil type	Average rainfall (mm)	Number of samples collected
	Longitude (^∘E)	Latitude (^∘N)			MF	FF	Leaves	Trees (DBH, H, CD)
Aplahoue	001^∘50^′42.6^′′	07^∘05^′06.4^′′	S1	1,200–1,300	160	140	300	143
Bante	001^∘58^′06.6^′′	08^∘13^′49.2^′′	S2	1,100–1,200	120	90	110	175
Basssila	001^∘39^′16.9^′′	09^∘02^′36.1^′′	S2	1,200–1,300	90	120	120	131
Biro	002^∘56^′28.8^′′	09^∘56^′11.2^′′	S2	900–1,100	130	110	120	60
Bohicon	002^∘04^′49.6^′′	07^∘18^′16.1^′′	S1	1,200–1,300	80	130	130	21
Djougou	001^∘26^′04.8^′′	10^∘07^′27.4^′′	S2	900–1,100	180	130	140	153
Ketou	002^∘35^′45.2^′′	07^∘20^′59.2^′′	S1 and S3	1,200–1,300	90	80	90	23
Lokossa	001^∘40^′16.4^′′	06^∘45^′26.1^′′	S1 and S3	1,200–1,300	140	150	270	144
Niaouli	002^∘08^′08.1^′′	06^∘44^′16.1^′′	S1 and S3	1,200–1,300	80	90	130	23
Sakete	002^∘35^′34.8^′′	06^∘37^′05.2^′′	S1	1,200–1,300	120	110	220	122
Save	002^∘31^′16.1^′′	08^∘04^′27.9^′′	S2	1,100–1,200	60	90	90	16
Tamarou	002^∘39^′38.4^′′	09^∘38^′17.7^′′	S2	900–1,100	90	120	160	19
Total					1,340	1,360	1,880	1,028

Male flowers (MF), female flowers (FF), diameter at breast height (DBH), Height (H) crown diameter (CD), ferralitic soil (S1), tropical ferruginous (S2), and vertisols (S3).