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Journal Article

The Zamiaceae in Panama with Comments on Phytogeography and Species Relationships

Dennis Wm. Stevenson
Brittonia
Vol. 45, No. 1 (Jan. - Mar., 1993), pp. 1-16
Published by: Springer on behalf of the New York Botanical Garden Press
Stable URL: http://www.jstor.org/stable/2806850
Page Count: 16

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The Zamiaceae in Panama with Comments on Phytogeography and Species Relationships
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Abstract

A key to, and descriptions of, the eleven species of Zamia in Panama are presented. Four of these are new species: Z. cunaria, Z.dressleri, Z. ipetiensis, and Z. neurophyllidia. Floristically, Zamia is represented in Panama by three elements: three Central American species, Z. acuminata, Z. fairchildiana, and Z.skinneri, which reach thier southern limits in central Panama; three northern South American species, Z. chigua, Z. manicata, and Z. obliqua, which reach their northern limits in Panama; and five endemic Panamanian species, Z. cunaria, Z. dressleri, Z. ipetiensis, Z. neurophyllidia, and Z. pseudoparasitica. These distributions are interpreted by a consideration of sister group relationships based upon derived morphological character states.

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