Character | C. acutum | C. tenuipes | C. xalapense |
Long of rhizome scales | 3 - 6 mm | 5 - 8 mm | 3 - 5 mm |
Broad of rhizome scales | 0.5 - 1.5 | 1 - 1.5 | 0.2 - 0.5 |
Color of rhizome scales | yellowish-brown to brown | brown | dark brown to blackish |
Lumen color of rhizome scales | translucid | translucid | brown |
Size of fronds | (20-) 45 - 93 cm | 30 - 80 cm | (20-) 30 - 60 cm |
Long of stipe | 1/12 - 1/9 of the frond length | 1/3 of the frond length | 1/10 of the frond length |
Broad of blade | (2-) 3 - 4.3 (-5.5) cm | 4 - 9 cm | 3 - 5.5 cm |
Blade apex | acute to attenuate | acuminate to cuspidate | acuminate to cuspidate |
Rows of areoles between parallel veins | commonly two | two | one |
Rows of sori between midvein and margin | 4 - 6 | 6 - 10 | 4 - 7 |
Altitudinal distribution | 1000 - 2700 m | 1000 - 2300 m | 500 - 1700 (-2300) m |