FIGURE 4 in Borreria savannicola (Spermacoceae, Rubiaceae), a new species from savanna patches within the Caatinga, Ceará State, Brazil

FIGURE 4. Microphotography of Borreria savannicola. A–C. Flower: A. Open bud. B. Open corolla. C. Detail of the stigma. D– E. Fruit: D. Capsule. E. Dehiscence valve in ventral view. F–H. Seed: F. Dorsal view. G. Ventral view. H. Detail of the exotestal. I– M. Pollengrain: I. Equatorialview. J. Polarview. K. Insideofpollengrain, detailofendoaperture. L. Exinebetweenectoaperture. M. Exine in polar view. Scale bars in each image.