FIGURE 5 in Morpho-anatomy of the cypselae of native species of Mutisieae (Asteraceae) from Mexico

FIGURE 5. Cross-sections of cypselae of Mexican Mutisieae. A–C. Whole cypsela. A. Chaptalia pringlei. B. C. lyratifolia. C. C. piloselloides. D. C. transiliens, epicarp and vascular bundle with sclereids in mesocarp. E. C. pringlei, detail papillose epicarp cells. F. C. piloselloides, detail flattened rectangular epicarp cells. G. Detail of sclereids surrounding the xylem cells. H. C. estribens, epicarp, inner layer of cells with anticlinal walls thick in mesocarp, and endocarp (arrows = crystals). I. C. lyratifolia, inner layer of cells with anticlinal walls thick in mesocarp, and endocarp with vascular bundle. J. C. hololeuca, polarized light crystals (arrows) in endocarp. K. C. texana, testa thick-walled. a = thick anticlinal walls of the inner mesocarp layer, c = cotyledon, e = epicarp, m = mesocarp, n = endocarp, s = sclereids, t= testa, x = xylem, * = vascular bundle. Scale is 300 µm in A; 100 µm in B, F, J; 50 µm in C, E; 20 µm in G; 10 µm in D; 5 µm in H, I, K–M.