56 



6 



24 



15 



30 



1 



1 



2 







3 























1 00 Phytologia (Aug 2004) 86(2) 



Site 1997 1998 1999 2000 2001 2002 2003 



A 32 72 



B 



C 



Table 1. Number of flowering scapes produced by three "populations" of 

 P. grandifolia in the Kisatchie National Forest. 



Site C, found on 26 March 1999 in a pitcher plant bog, (see 

 MacRoberts et al. 2002 for a description of this bog) consisted of only 

 22 leaves in a 1 meter square area. This population was about 350 

 meters west of Site A. In May 2000, it had 29 leaves, but by September 

 2000, after a severe drought, the site was dry and all above ground 

 vegetation had disappeared. In November 2001, one leaf appeared; it 

 was not found at this location in 2002 or 2003. Associated vegetation 

 included Acer rubrum, Aletris aurea, Alnus serrulata, Dichanthelium 

 spp., Eriocaulon decangulare. Eupatoriwn fistulosum, Gelsemium 

 sempervirens, Helianthus angustifolius, Liatris pycnostachya, Magnolia 

 virginiana, Melanthium virginicum, Mitreola sessilifolia, Morella 

 caroliniensis, Nyssa sylvatica, Osmunda regalis, Persea palustris, 

 Ptilimnium sp., Rhododendron oblongifolium, Sarracenia alata, Scleria 

 ciliata, Smilax laurifolia, Toxicodendron vernix, Viburnum nudum, and 

 Viola primulifolia. 



All three sites occur on Betis mildly acidic (4.8-5.4 pH) low-nutrient 

 loamy fine sands on north and west-facing 5-20 degree slopes (Martin et 

 al. 1990). All three sites have between 90% to 100% shrub/canopy cover 

 with filtered light. 



We monitored flowering — which occurs in late October and early 

 November — between 1997 and 2003 (Table 1). A severe drought in 

 2000 dried out all sites resulting in the collapse of flowering at Site A. 

 The extent of vegetation, however, was not affected except at Site C as 

 described above. 



