Fig. 2
From: Micro-morphological study of Evolvulus spp. (Convolvulaceae): the old world medicinal plants
Transverse sections of leaf and stem. A single epidermal layer and bicollateral vascular bundle of E. alsinoides (a), E. glomeratus (b) and E. nummularius (c). Tanniniferous epidermal cell is unique in E. alsinoides from Petchaburi (a, g, j indicated by red arrows). Isobilateral mesophyll present in E. alsinoides (d) and E. glomeratus (e). Evolvulus nummularius showing dorsiventral mesophyll type (f). Rounded leaf margins of E. alsinoides (g), E. glomeratus (h) and E. nummularius (i). Outline of stem in E. alsinoides (j), E. glomeratus (k) and E. nummularius (l). Enlarged view to show the stem layers of E. alsinoides (m), E. glomeratus (n) and E. nummularius (o)