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The Cycad Pages
Dioon rzedowskii

Dioon rzedowskii "De Luca, A. Moretti, Sabato & Vásq. Torres", Brittonia 32(2): 225-229 (1980).
"TYPE: Mexico, Oaxaca, Distrito de Teotitlan, below the town of San Bartolome Ayautla, 22 May 1979, M. Vazquez Torres 2300 (holo XALUV, iso ENCB, FI, MEXU, NAP, NY)."[NY][NY][NY]


Distribution and habitat: Mexico - Oaxaca

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

Description:

Plants arborescent. Stem 5 m tall, 40 cm diam.

Leaves light or bright green, highly glossy, 140-180 cm long, flat (not keeled) in section (opposing leaflets inserted at 180° on rachis), with 160 leaflets; basal leaflets not reducing to spines, petiole spine-free for 10-15 cm.

Leaflets lanceolate, not falcate, inserted at 90° to rachis, not overlapping; margins flat, entire; median leaflets 14-19 cm long, 18-21 mm wide.

Pollen cones narrowly ovoid to fusiform, pale brown, 30-50 cm long, 8 cm diam.

Seed cones ovoid to narrowly ovoid, pale brown, 60-80 cm long, 20-25 cm diam.

Seeds oblong, 50-60 mm long, 30 mm wide, sarcotesta cream or white.


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