Table 1.
A comparison of macromorphology, anatomy, micromorphology, and ultrastructure of labellum of B. levanae and B. nymphopolitanum (Wiśniewska et al. 2018) and the examined B. echinolabium (for the need of this presentation, hypochile and epichile are presented together). + present, − absent
| Species/method | B. levanae (Wiśniewska et al. 2018) | B. nymphopolitanum (Wiśniewska et al. 2018) | B. echinolabium |
|---|---|---|---|
| Lip | Lip | Lip (hypochile and epichile) | |
| Osmophores (LM: mb, methylene blue) | + | ||
| Dihydroxyphenols in cytoplasm (possibly in plastids) (FeCl3) | + | + | – |
| Dihydroxyphenols in vacuoles (FeCl3) | – | – | – |
| Secretions (SEM) | + | + | + |
| Proteins (ABB) | + | + | + |
| Starch grains (PAS) | + | – | + |
| Mucilage (Ruthenium red) | – | – | – |
| Auramine O | + | + | |
| DAPI | + | ||
| Lipids (SBB) | + | + | + |
| Secretions (TEM) | + | + | + |
| Micro-channels (TEM) | + | – | – |
| Periplasmic spaces | + | + | + |