The Cycad Pages
Dioon spinulosum

Dioon spinulosum Dyer ex Eichler, Gart. Zeit. Berlin: 411 (1883).
"TYPE: Mexico, Tuxtla, Yucatan, Progreso, C.J. Hoge s.n. (holo K)."

Distribution and habitat: Mexico - Oaxaca, Veracruz, Yucatan

Conservation status: 1997 IUCN Red List of Threatened Plants category R.


Plants arborescent. Stem 10 m tall, 40 cm diam.

Leaves light or bright green, highly glossy, 150-200 cm long, flat (not keeled) in section (opposing leaflets inserted at 180° on rachis), with 140-240 leaflets; basal leaflets reducing to spines.

Leaflets lanceolate, not falcate, inserted at 80-90° to rachis, not overlapping; margins flat, dentate; median leaflets 15-20 cm long, 14-20 mm wide.

Pollen cones narrowly ovoid to fusiform, pale grey, 40-55 cm long, 7-10 cm diam.

Seed cones ovoid, pale grey, 30-90 cm long, 20-35 cm diam.

Seeds ovoid, 40-50 mm long, 30-35 mm wide, sarcotesta cream or white.

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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