. Conservation strategy for Silene spaldingii (Spalding's catchfly) in Montana . Botany; Rare plants; Silene spaldingii. Figure 28. Map of EO #13 with nearby EO #14. Vegetation Associated Dominant Species: Festuca scabrella, Festuca idahoensis, Stipa richardsonii, Elymus spicatus, Geum triflorum and Koeleria macrantha. Exotic Species: Hypericum perforatum, Potentilla recta, Poa compressa and Poa pratensis. August 22, 2005. Survey Data First Observation: 2002 Last Observation: August 22, 2005 Table 8. Survey data for EO #13. Year Total SP1 SP2 SP3 2005 21 mature plants 14 3 4 Figure 29. Lost Tr
. Conservation strategy for Silene spaldingii (Spalding's catchfly) in Montana . Botany; Rare plants; Silene spaldingii. Figure 28. Map of EO #13 with nearby EO #14. Vegetation Associated Dominant Species: Festuca scabrella, Festuca idahoensis, Stipa richardsonii, Elymus spicatus, Geum triflorum and Koeleria macrantha. Exotic Species: Hypericum perforatum, Potentilla recta, Poa compressa and Poa pratensis. August 22, 2005. Survey Data First Observation: 2002 Last Observation: August 22, 2005 Table 8. Survey data for EO #13. Year Total SP1 SP2 SP3 2005 21 mature plants 14 3 4 Figure 29. Lost Trail NWR East - EO #13, subpop. 2. This population was apparently discovered in 2002, though original documentation for the occurrence is unavailable. The population occurs on a 480- acre tract of state land surrounded by the Lost Trail National Wildlife Refuge on three sides and by Plum Creek Timber Company lands to the north. This occurrence is approximately five kilometers east of EO #14 (Lost Trail NWR West) and EO #13 and #14 have been reported as being one population in previous reports (Hill and Gray 2004). If additional S. spaldingii plants are documented between these two occurrences, then that may eventually be the best way to treat them since the unoccupied distance will be much smaller. See EO #14 for further discussion about population size and survey data pertinent to the Lost Trail NWR occurrences. Threats to this occurrence appear to be minimal at the current time. Several exotic species are present in the vicinity though none currently pose immediate threats. It is likely that control measures will eventually need to be implemented to contain Hypericum perforatum and Potentilla recta within the occupied S. spaldingii habitat. Two permanent belt transects measuring 15 m and 24 m were established in subpopulation 1 in 2004 for a demographic monitoring study (Lesica and Crone 2004). Data are not presented here due to the limited survey data available as of this rep
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