Floral Nectary Anatomy and Ultrastructure in Mycoheterotrophic Plant, Epipogium aphyllum Sw. (Orchidaceae)

Figure 2

SEM studies of lip on the 8th day of anthesis. (a) Cordate epichile with papillate ridges. (b) Rounded (often sunken) cells from the furrow. (c) Rounded cells close to margin without secretions. (d) Papillate ridges with multicellular outgrowths. (e) Papillae with the cuticle swellings (arrows) at their backsides and secretion at their apices. (f) Secretion at the apex of papilla.