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The Cycad Pages
Zamia dressleri

Zamia dressleri D.W. Stev., Brittonia 45(1): 6 (1993).
"TYPE: Panama, Colon, 7 Jan 1989, D. Stevenson & I. Valdespino 1145 (holo NY iso FTG, MO, NY, PMA, U)."[NY][NY][NY]


Etymology: Named in honor of Robert Dressler who was the first to recognize it as a distinct species.

Historical notes:

Distinguishing features: Very large leaves on small tuberous stems with only a few (up to 10) leaflets that are deeply grooved. These small plants bear small cones. Zamia dressleri is most similar to Z. wallisii A. Br. of Colombia but Z. wallisii has very distinctive adaxially grooved petiolules in contrast to the sessile leaflets of Z. dressleri.

Distribution and habitat: Endemic to Panama where it is only known from two small disjunct populations. It occurs on well-drained soils in understory of primary rainforest.

Conservation status: Zamia dressleri is severely threatened by habitat destruction. Recently, attempts to locate plants in one of the two known populations was unsuccessful. 1997 IUCN Red List of Threatened Plants Category E,II,V.
from Stevenson (1993)

Description:

Stem subterranean, 3-5 cm diam.

Cataphylls ovate, 1-2 cm long, 2-3 cm wide.

Leaves usually solitary (2-3), 0.5-1.5 m long; petiole 0.3-1 m long, sparsely to densely prickled; rachis with 2-5 pairs of leaflets, occasionally with a few prickles in the lower third.

Leaflets elliptic, grooved between the veins on the adaxial surface, cuneate basally, acuminate apically, margins serrate in upper third, the larger median ones 30-50 cm long, 12-15 cm wide.

Pollen cones cream to tan, cylindrical to elongate-cylindrical, 5-8 cm long, 1-2 cm diam.

Seed cones wine-red to dark red-brown, short pedunculate, ovoid cylindrical, 10-15 cm long, 3-4 cm diam.

Seeds red, ovoid, 1-1.5 cm diam.


The Cycad Pages

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