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The Cycad Pages
Dioon tomasellii

Dioon tomasellii "De Luca, Sabato & Vázq. Torres", Brittonia 36: 225-227 (1984). H—NAP
"TYPE: Mexico, Nayarit, Distrito de Miravalles, Municipio de Jalisco, arroyo Laurel on Cerro Caraton, S of Costilla, 12 Jun 1979, M. Vazquez Torres 2307 (holo NAP, iso ENCB, MEXU, NY, XALU)."


Distribution and habitat: Mexico

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

Description:

Plants arborescent. Stem 1 m tall.

Leaves light or bright green, semiglossy, 100-200 cm long, flat (not keeled) in section (opposing leaflets inserted at 180° on rachis), with 140-180 leaflets; basal leaflets reducing to spines.

Leaflets narrowly lanceolate, falcate, inserted at 90° to rachis, not overlapping; margins flat, entire or dentate; median leaflets 10-18 cm long, 7-12 mm wide.

Pollen cones narrowly ovoid to fusiform, pale brown, 25-50 cm long, 6-10 cm diam.

Seed cones ovoid, pale brown, 20-30 cm long, 15-20 cm diam.

Seeds ovoid, 25-35 mm long, 20-25 mm wide, sarcotesta cream or white.


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