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CHROMOSOME COUNTS IN MEXICAN ERIGERON

Diederik C. D. De Jong and Guy L. Nesom
Madroño
Vol. 43, No. 3 (JULY-SEPTEMBER 1996), pp. 384-392
Stable URL: http://www.jstor.org/stable/41425149
Page Count: 9
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
CHROMOSOME COUNTS IN MEXICAN ERIGERON
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Abstract

Chromosome numbers are reported for 75 populations of 19 species of Erigeron from Mexico and 4 populations of 1 species from Arizona. First reports for the species are given for E. fraternus, E. polycephalus, E. strigulosus, and E. wislizeni, and new ploidy levels are reported for E. coronarius van durangensis, E. janivultus, E. forreri, E. pubescens, and E. versicolor. Erigeron gilensis and E. mimegletes are treated as synonyms of E. versicolor, a species previously considered to be endemic to southcentral Mexico. Comments on morphological variability in E. versicolor, E. longipes, E. pubescens, and several other species are provided.

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