|The Cycad Pages
- Ceratozamia mixeorum Chemnick & T.J. Greg. & S. Salas-Mor., Phytologia (July 1997) 83(1): 47-52 (1998).
- "TYPE: Mexico, Oaxaca, vicinity of Juquila Mixes, May 1997, Chemnick & Gregory & Salas-Morales s.n. (holo HNT, iso FTG, XAL)."
Honoring the indigenous people of the region of occurrence.
Named in 1998 by American botanists Jeff Chemnick and Timothy Gregory
and Mexican biologist Silvia Salas-Morales.
Large cones on elongated peduncles, medium-width leaflets.
Distribution and habitat:
A narrow endemic in Oaxaca state, Mexico, in
mixed evergreen and deciduous cloud forests in the Sierra Mixes.
Not listed by the
1997 IUCN Red List of Threatened Plants.
Plants acaulescent; stem 34-125 cm long, stem 14-18 cm diam;
persistent leaf bases light, appressed.
Leaves 15-33 in crown. New growth emerging mid-green. Leaves dark
green, 146-198 cm long, flat (not keeled) in section, with 49-77 leaflets;
vernation straight; rachis not or slightly spirally twisted; petiole 45-85 cm
long, armed with prickles.
Leaflets not clustered, linear, symmetric, broadest below middle, not
falcate, weakly discolorous, thick or leathery; margins incurved; median
leaflets 24-39 cm long, 21-29 mm wide.
Pollen cones yellow-green, narrowly ovoid-cylindrical, 22-24 cm long,
7-7.5 cm diam.; peduncle 13.5-15 cm long; microsporophyll lamina 7-8 mm long,
14-15 mm wide.
Seed cones yellow-green, ovoid-cylindrical, 23-31 cm long, 12-15 cm
diam.; peduncle 12.5-23 cm long; megasporophyll 24-28 mm long, with an expanded
peltate apex 42-50 mm wide, with two horns 5 mm long.
Seeds ovoid, 25-32 mm long, 18-20 mm wide.