ABSTRACT
This chapter describes a genetic analysis of Mielichhoferia plants from one of the five populations where Mielichhoferia elongata and M. mielichhoferiana are known to hybridize and produce viable recombinants. In addition to diagnostic allozyme loci used to identify recombinants in the previous more extensive study, three additional loci were utilized in this study to identify plants in the population as M. elongata, M. mielichhoferiana, or recombinants. The chapter also describes genetic and morphological variation among 108 plants collected in a hybrid zone involving these two species of M. elongata and M. mielichhoferiana at the Eureka Mine, San Juan County, Colorado. Mean values for the morphological multiple measurements per sample were used in subsequent statistical analyses. Comparable leaf and cell measurements were made on 20 additional plants that bore sporophytes. Sporophytes sampled from the population appear to belong exclusively to gametophytes of M. elongata.
