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 |