The catalog of the vascular flora documented at LCSNP is listed in Appendix 1.
The physiognomic analysis of the flora at LCSNP revealed some interesting information on plant composition (Table 1).
2007), 42 species documented at LCSNP are reported for the first time and represent Wayne County records.
Gravel quarries.--An excavation of the south side of the summit at LCSNP, along Abington Pike, provides a somewhat open, dry environment.
The 10 plant families, accounting for more than 50% of the plants reported at LCSNP and all the sites referred to above, are the Apiaceae, Asteraceae, Brassicaceae, Cyperaceae, Fabaceae, Lamiaceae, Liliaceae, Poaceae, Ranunculaceae, and Rosaceae.
The flora at LCSNP is dominated by herbaceous plant species (307 species or 79.3%) including forbs (240 species), vines (6), grasses (36 species), and sedges (25 species).
For the native vascular flora, LCSNP has a floristic quality index (FQI) of 68.4, with a mean coefficient of conservatism ([C.sub.av]) of 3.9.
We documented 83 exotic species at LCSNP. From these numbers it would appear that the adventive flora is having a negative impact on the native flora.
PCQ analysis of the floodplain forests.--Based on tree composition, the two small floodplains at LCSNP are clearly different (Tables 3, 4).