Photo Ken Hill
The Cycad Pages
Ceratozamia robusta

Ceratozamia robusta Miq., Tijdschr. Wis-Natuurk. Wetensch. Eerste Kl. Kon. Ned. Inst. Wetensch. 1: 42-43 (1847).
"TYPE: Mexico, Chiapas, NW of Tuxtla Gutierrez, 9 Jul 1983, Stevenson 549A (neo NY, iso ?)."[NY]

Etymology: Latin, robusta, large.

Historical notes: Named in 1847 by Dutch botanist F.A.W. Miquel from plants of uncertain origin cultivated in European collections. All type material was apparently lost, and a new type based on material collected in Chiapas was designated in 1986.

Distinguishing features: Large plants with long leaves and thick wide leaflets.

Distribution and habitat: Widely distributed, in Belize, Guatemala and Mexico, Oaxaca (?Chiapas) and Veracruz states. An understorey plant in evergreen wet tropical forests.

Conservation status: Not threatened. 1997 IUCN Red List of Threatened Plants category R.
Photo Ken Hill


Plants arborescent; stem 200 cm long, stem 30 cm diam.

Leaves 8-30 in crown. New growth emerging bronze, red or chocolate brown, or mid-green. Leaves dark green, semiglossy, 150-300 cm long, flat (not keeled) in section, with 100-200 leaflets; vernation straight; rachis not or slightly spirally twisted; petiole 20-60 cm long, armed with prickles.

Leaflets not clustered, lanceolate, symmetric, broadest below middle, falcate, concolorous, thick or leathery; margins recurved; median leaflets 20-30 cm long, 20-50 mm wide.

Pollen cones brown, ovoid-cylindrical or narrowly ovoid-cylindrical, 30-50 cm long, 10-14 cm diam.; peduncle 10 cm long.

Seed cones grey, ovoid-cylindrical, 30-50 cm long, 10-14 cm diam.; peduncle 15 cm long.

Seeds ovoid, 25 mm long, 20 mm wide; sarcotesta white, aging to brown.

The Cycad Pages

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Written and maintained by Ken Hill 1998-2010
Maintained by Leonie Stanberg and Dennis Stevenson 2010-2012
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