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The Spermatozoid of Zamia chigua Seem
Botanical Gazette, 1977Zamia chigua, a large arborescent cycad of the Pacific coast of Colombia, produces two very large spermatozoids per pollen tube. After fixation and embedment in glutaraldehyde-OsO4, the diameter of the spermatozoid is approximately 400 μm. This is about 100 μm larger than the greatest dimension reported for any other cycad. Unlike other cycads in which
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Botanical Gazette, 1926
(WITH SIX FIGURES) Genera in the cycads are not only so distinct that they are easily recognizable, but they are so sharply defined that interrelationships within the family are uncertain. Sister MARY ALICE' constructed a key to the genera, based upon the leaflets.
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(WITH SIX FIGURES) Genera in the cycads are not only so distinct that they are easily recognizable, but they are so sharply defined that interrelationships within the family are uncertain. Sister MARY ALICE' constructed a key to the genera, based upon the leaflets.
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Clarification of Zamia acuminata and a new Zamia species from Coclé Province, Panama
2013Lindström, Anders J., Calonje, Michael, Stevenson, Dennis, Husby, Chad, Taylor, Alberto (2013): Clarification of Zamia acuminata and a new Zamia species from Coclé Province, Panama. Phytotaxa 98 (2): 27-42, DOI: 10.11646/phytotaxa.98.2.1, URL: http://dx.doi.org/10.11646/phytotaxa.98.2 ...
Lindström, Anders J. +4 more
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Karyology and Phylogeny of Some Mesoamerican Species of Zamia (Zamiaceae)
American Journal of Botany, 1996Luciano Gaudio +2 more
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