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Chromosomal Observations on the Alzateaceae (Myrtales)

Frank Almeda
Annals of the Missouri Botanical Garden
Vol. 84, No. 2 (1997), pp. 305-308
DOI: 10.2307/2400006
Stable URL: http://www.jstor.org/stable/2400006
Page Count: 4
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Chromosomal Observations on the Alzateaceae (Myrtales)
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Abstract

Alzatea verticillata Ruiz & Pav. subsp. amplifolia S. A. Graham of the monotypic neotropical family Alzateaceae has a haploid chromosome number of n = 14. This first report for the family is unique as a putative base number among the 14 core families of the Myrtales. Given that x = 12 appears to be the basic number for the order, n = 14 could have arisen as an ascending dysploid or as a tetraploid derived from an ancestral base number of x = 7. A summary of probable basic chromosome numbers is given for all families currently recognized in the Myrtales except the Crypteroniaceae, which remains unknown cytologically.

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