Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. 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.

Population Dynamics and Flowering Synchrony of Goodyera pubescens (Orchidaceae) in Southwestern Quebec, Canada

Joyce M. Reddoch and Allan H. Reddoch
The Journal of the Torrey Botanical Society
Vol. 134, No. 3 (Jul. - Sep., 2007), pp. 379-388
Published by: Torrey Botanical Society
Stable URL: http://www.jstor.org/stable/20063929
Page Count: 10
  • Read Online (Free)
  • Download ($10.00)
  • Subscribe ($19.50)
  • Cite this Item
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.
Population Dynamics and Flowering Synchrony of Goodyera pubescens (Orchidaceae) in Southwestern Quebec, Canada
Preview not available

Abstract

Two populations of the clonal orchid Goodyera pubescens (Willd.) R. Br. were studied between 1976 and 2006 in Gatineau Park, Quebec, at the northern edge of the distribution. The species is ranked as "imperiled" in the province. Four life-history stages were identified: seed, juvenile/immature, flowering and vegetative. The populations, which were 5 km apart, expanded with doubling times of 7.5 and 15.9 years, the difference in doubling times being attributed to ongoing herbivory at the latter site. Inter-generational times for vegetative reproduction were 4-8 years, while none of the few juvenile/immature individuals monitored had flowered after 9 years. Large flowerings, of up to 30% of the rosettes in a patch, usually were spaced at intervals of 2-4 years. These large flowerings were synchronous within patches, among patches, and between populations. They occurred in the years that followed years with an extensive warm, dry period in May.

Page Thumbnails

  • Thumbnail: Page 
379
    379
  • Thumbnail: Page 
380
    380
  • Thumbnail: Page 
381
    381
  • Thumbnail: Page 
382
    382
  • Thumbnail: Page 
383
    383
  • Thumbnail: Page 
384
    384
  • Thumbnail: Page 
385
    385
  • Thumbnail: Page 
386
    386
  • Thumbnail: Page 
387
    387
  • Thumbnail: Page 
388
    388