Table 3. Morphological differences between the units detected within the C. azurea complex and the related taxa.

Feature	C. azurea s. str.	C. azurea–NA	C. orientalis	C. sinensis	C. granulata
Underleaf shape	Lobe apices subrounded, not incised, undivided area with 3–6 cells high, lateral side smooth	Lobe apices subrounded, not incised, undivided area with 2–4 cells high, lateral side smooth	Lobe apices merely acute, lateral sides usually have additional teeth, or lobe apex incised, undivided area with 1–3 cells high	Deeply divided into two triangular lobes, with lateral side rounded (rarely), crenulate or with distinct, although obtuse teeth to bisbifid, undivided area with 2-3(-4) cell high	Obligately bisbifid
Underleaf size	Well-developed underleaves, 490–950 μm wide × 400–790 μm long	Well-developed underleaves, 300–770 μm wide × 250–690 μm long	Well-developed underleaves, 400–800 μm wide × 200–300 μm long	Well-developed underleaves, 300–550 μm wide × 400–1000 μm long	Well-developed, underleaves 200–600 μm wide × 200–400 μm long
Oil bodies	Oil bodies deep to pale blue, present in all cells of underleaf cells, but absent from some leaf cells, usually composed of 2–4 (-9) large and distinct globules, (2-)3-7 per cell, 4-7x6-12 μm	Oil bodies deep to pale blue, present in all cells of underleaf cells, but absent from some leaf cells, usually composed of 2–6 large and distinct globules or rarely spherical 2–3 per cell, 4-7x6-12 μm	Oil bodies botryoidal in the middles, dark blue, 2(-3) per cell, ellipsoidal, irregularly oblong to shortly fusiform, 4-11x3-5 μm	Composed of small globules (coarsely granular), deep blue to blue-brown, 3–6 per cell	Deep blue to brown-blue and brownish, finely granular
Dominant ecology	Moist humus and soils	Decaying wood, organic debris	Decaying wood	Cliffs to decaying wood and tree trunks	Moist cliffs and soils