Studies on the Stomata of Some Rubiaceae

Twelve taxa comprising six herbs, four shrubs and two liane were documented with descriptions for the nature of stomata. The epidermal cells are generally arched as found in 9 taxa with the remaining 3 taxa waxy. Anomocytic, paracytic and mixed-anomocytic and paracytic stomata were observed with preponderance of paracytic type- 8 taxa, anomocytic-1 and mixed anomocytic?paracytic- 3 taxa. Stomata size ranges from 20.16?m± 0.22 x 13.44?m± 0.21 in Mussaenda chippii to 43.24?m± 0.29 x 31.92?m± 0.58 in Borreria ocymoides. Stomata index values vary from 5.70% in Diodia scandens to 25% in Oldenladia affinis.