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

Figure 1

Epipogium aphyllum: (a) habitat in Darżlubska Forest, (b) normal blooming shoot, (c) inflorescence of normal blooming shoot, (d) half-albino blooming shoot (without yellow pigment), and (e) half-albino blooming shoot (without pink pigment). Visiting insects licking the fluids on the lip: (f, g) Meliscaeva cinctella and (h) Chrysanthia geniculata. (i) Lip epichile with four pink papillate ridges leading to the upwardly located spur and central furrow with pink smudge (sm); hypochile with two lateral lobes (LM). (j) Multicellular outgrowths on ridges consisted of groups of rounded papillae (LM) (ds: dorsal sepal, ls: lateral sepal, pt: petal, lip with hp–hypochile and ep–epichile, s: spur, and sm; pink smudge on epichile).