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The Cycad Pages
Ceratozamia latifolia

Ceratozamia latifolia Miq., Tijdschr. Wis-Natuurk. Wetensch. Eerste Kl. Kon. Ned. Inst. Wetensch. 1: 206 (1848).
"TYPE: Mexico, San Luis Potosi, W of Antiguo Morelos, 20 July 1983, Stevenson 565E (neo NY, iso MEXU, NY, fide Stevenson & Sabato 1986)"[NY]


Etymology: Latin latus, wide, folium, leaf. Although technically referring to leaves, this name is actually from the distinctively broad leaflets.

Historical notes: Named in 1848 by Dutch botanist F.A.W. Miquel. All type material was apparently lost, and a new type based on material collected in San Luis Potosi was designated in 1986 .

Distinguishing features: Plants of small stature with broad thin leaflets even arranged along the rachis

Distribution and habitat: Restricted to oak forests in the cloud zone of the Sierra Madre Oriental, in San Luis Potosi, Queretaro and Hidalgo states, Mexico.

Conservation status: Rare. 1997 IUCN Red List of Threatened Plants category V.
Photo Ken Hill

Description:

Plants arborescent; stem 10-20 cm long, stem 10 cm diam.

Leaves 2-4 in crown. New growth emerging bronze, red or chocolate brown. Leaves light or bright green, semiglossy, 50-100 cm long, flat (not keeled) in section, with 30-80 leaflets; vernation straight; rachis not or slightly spirally twisted; petiole 15-20 cm long, unarmed.

Leaflets not clustered, lanceolate, asymmetric, broadest above middle, not falcate, weakly discolorous, thick or leathery; margins flat; median leaflets 15-24 cm long, 20-40 mm wide.

Pollen cones yellow-green, fusiform-cylindrical, 15-17 cm long, 2-2.5 cm diam.; peduncle 5 cm long.

Seed cones yellow-green, ovoid-cylindrical, 5-6 cm long, 4-4.5 cm diam.

Seeds ovoid, 18-19 mm long, 14 mm wide; sarcotesta white, aging to brown.


The Cycad Pages

© 1998-2012 Royal Botanic Gardens Sydney
Written and maintained by Ken Hill 1998-2010
Maintained by Leonie Stanberg and Dennis Stevenson 2010-2012
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