FIGURE 4 in Digitaria clarkiae (Paniceae, Panicoideae, Poaceae), a new species with a paniculate synflorescence, and the first record of D. costaricensis from México

FIGURE 4. Spikelet morphology of Digitaria clarkiae and species of sections Pennatae and Trichachne. Incertae sedis: Digitaria clarkiae (A-C). A. Spikelet adaxial view. B. Spikelet abaxial view. C. Fertile lemma. Sect. Trichachne: D. patens (D-F). D. Spikelet adaxial view. E. Spikelet abaxial view. F. Fertile lemma. Sect. Pennatae: D. pubiflora (G-I). G. Spikelet adaxial view. H. Spikelet abaxial view. I. Fertile lemma. D. cognata (J-L). J. Spikelet adaxial view. K. Spikelet abaxial view. L. Fertile lemma. D. arenicola (M-O). M. Spikelet adaxial view. N. Spikelet abaxial view. O. Fertile lemma.