Photo Ken Hill
The Cycad Pages
Ceratozamia hildae

Ceratozamia hildae G.P. Landry & M.C. Wilson, Brittonia 31(3): 422-424 fig. 1) (1979).
"TYPE: cult. Louisiana, Baton Rouge, coll. from N of Xitilla, San Luis Potosi, Mexico, G. Landry 76521 (holo GH, iso FTG, LSU, MEXU, MICH, NY, US)."[NY][NY][NY][NY]

Etymology: Honoring Hilda Guerra Walker, daughter of the original collector.

Historical notes: First collected in the 1950s by commercial Collector Luciano Guerra, but not formally named until 1979. This species became widespread and abundant in cultivation before being described from cultivated plants.

Distinguishing features: The arrangement of the leaflets in clusters on the rachis separates this species within the genus.

Distribution and habitat: A species with sporadic distribution in the coastal ranges of Queretaro and San Luis Potosi states, Mexico, growing in the cloud zone in deciduous oak woodlands.

Conservation status: Critically endangered in the wild, although abundant in cultivation. 1997 IUCN Red List of Threatened Plants category E.
Photo Ken Hill
Photo Ken Hill


Plants acaulescent; stem 10-20 cm long, stem 5-25 cm diam.

Leaves 5-20 in crown. New growth emerging bronze, red or chocolate brown, or mid-green. Leaves light or bright green, semiglossy, 100-150 cm long, flat (not keeled) in section, with 20-50 leaflets; vernation straight; rachis not or slightly spirally twisted; petiole 20-30 cm long, armed with prickles.

Leaflets clustered, lanceolate, asymmetric, broadest above middle, falcate, weakly discolorous, thin or membranous; margins flat; median leaflets 7-22 cm long, 10-50 mm wide.

Pollen cones yellow-green, fusiform-cylindrical, 18-25 cm long, 2-3 cm diam.; peduncle 3.5 cm long.

Seed cones yellow-green, narrowly ovoid-cilindrical, 10-14 cm long, 3-5 cm diam.; peduncle 9 cm long.

Seeds ovoid, 18-20 mm long, 15 mm wide; sarcotesta white, aging to brown.

The Cycad Pages

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Written and maintained by Ken Hill 1998-2010
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