GANGER, MIKE T. Department of Biology, Massachusetts College of Liberal Arts, North Adams, MA. - Reproductive success and genet development in a clonal herb: the case for context.
Canada mayflower (Maianthemum canadense Desf.) is a
rhizomatous, perennial herb common to the understory of mixed
coniferous-deciduous forests in New England. Mayflower genets are
composed of ramets that in a given year may be either flowering (with
2-3 leaves and a terminal inflorescence consisting of 4-35 perfect
flowers) or vegetative (with 1 leaf). Ramets are the fundamental units
of the genet that live, reproduce, and die. Variables specific to
flowering ramets, such as age, number of years prior to flowering, and
number of times previously flowering, are not predictive of ramet seed
maturation. An attempt here is made to describe ramets inclusive of
their genet condition. If the survivorship and reproduction of a ramet
is influenced by other ramets within the same genet, then adjacent
ramets may play a greater role than more distant ramets. The identity
of these adjacent ramets (whether flowering , vegetative, or absent)
is here termed ramet context. A two-year field experiment with Canada
mayflower was undertaken to determine in part whether ramet context
was predictive of seed maturation, ramet age, and allocation to future
sexual reproduction. Data concerning ramet context also proved useful
in reconstructing genet development.
Key words: genet, Liliaceae, Maianthemum canadense, ramet