Phytologia (Aug 2004) 86(2) 99 



In a previous paper, we reviewed the status of Parnassia in the West 

 Gulf Coastal Plain (MacRoberts et al. 1 997; see also McDaniel et al. 1 997). 

 In this paper, we describe our subsequent observations. The purpose of 

 our recent work was threefold: first, search for additional populations 

 of P. grandifolia in Louisiana, second, monitor those populations, and 

 third, compare the ecology and morphology of Louisiana populations 

 to populations elsewhere in the region. We, therefore, surveyed baygalls 

 and bogs in promising habitat in and around our original discovery site. 

 We traveled to Mississippi and Oklahoma to examine Parnassia habitat 

 in those places and examined herbarium specimens. 



Botanical names follow Kartesz and Meacham ( 1 999) and authorities 

 can be read in that work. 



LOUISIANA SURVEYS 



We concentrated — but did not confine — our surveys to the 

 vicinity of the site of our first discovery of the species on the Winn 

 Ranger District, Kisatchie National Forest, in Natchitoches Parish. The 

 original population (Site A), found on 21 March 1997, is described in 

 MacRoberts et al. 1997. After this discovery, we found two additional 

 sites, both close to the original site. 



SiteB, found on 26 July 1999, is about 100 meters west of Site A and 

 about 15 meters east of a pitcher plant bog on a hillside just a few meters 

 above a bay gall. This population consisted of three small clumps that 

 varied from 40 to 50 leaves in a 1 meter square area between 1999 and 

 2003. Associated species included A cer rubrum, Athyrium filix-femina, 

 Callicarpa americana, Cornus florida, Dichanthelium sphaerocarpon, 

 Magnolia virginiana, Mitchella repens, Morella caroliniensis, Nyssa 

 sylvatica, Persea palustris, Pinus palustris, Melanthium virginicum, 

 Osmunda cinnamomea, O. regalis, Rhododendron oblongifolium, 

 Sassafras albidum, Smilax rotundifolia, Woodwardia areolata, and 

 Viburnum nudum. 



