Character

C. amphostenon

C. irregulare

C. leoniae

C. pittieri

Rhizome glaucous

yes

yes

no

No or scarcely

Distance between fronds

2 - 15 mm

(approximate-) 2 - 5 mm distant

Approximate to 3 (-5) mm distant

5 - 30 (-50) mm

Long of rhizome scales

4 - 8 mm

3 - 5 mm

1.5 - 4.0 mm

2 - 5 mm

Color of rhizome scales

yellowish-brown to grayish-brown

brown to dark brown

brown to dark brown

brown to dark brown

Form of basal cell of rhizome scales

triangular to hexagonal, isodiametric

poligonal, irregular

poligonal, irregular

Rounded to poligonal, isodiametric

Long of apical cells of rhizome scales

1.5 - 3.0 times longer than wide

1.5 - 3.5 times longer than wide

2 - 5 times longer than wide

1 - 2 times longer than wide

Lumen cells color of rhizome scales

translucid

brown

brown

translucid to grayish-brown

Fronds size

30 - 55 (-65) cm

20 - 45 cm

(10-) 20 - 35 (-50) cm

(35-) 45 - 60 (-80) cm

Long of phyllopodia

1.5 - 3 mm

1 - 3 mm

0.5 - 1 (-2) mm

2 - 4 mm

Long of stipe

4 - 10 (-20) cm

0.5 - 3.0 (-5.0) cm

(0.5-) 1 - 5.0 cm

8 - 25 cm

Diameter of stipe

2 - 3 mm

(1-) 1.5 - 2 mm

1 - 1.5 mm

2 - 3 mm

Broad of blade

1.0 - 3.5 cm

(0.4-) 0.6 - 1.2 cm

(0.5-) 1 - 2 (-.3) cm

(1.3-) 2.0 - 5.0 cm

Brightness of abaxial blade surface

middle to markerly lustrous

lustrous (rarely opaque)

opaque

middle lustrous

Highlighted veins

few or not

not

not

yes

Altitudinal distribution

(1800-) 2100 - 2900 (-3200) m

(1700-) 1900 - 2500 m

(700-) 1000 - 1850 (-2000) m

(1900-) 2700 - 3400 (-3550) m