22 



management practices (grazing, habitat 

 alteration through road construction or 

 mining) . Because the taxon blooms and fruits 

 early in the growing season, and persists as 

 deep-seated corms approximately six to twelve 

 cm. beneath the soil surface, impacts from 

 grazing later in the season are not expected 

 to be intense. Once uprooted or exposed by 

 major soil disturbance or erosion, however, 

 it is not expected that the corms would 

 survive. Also, no evidence was found during 

 field surveys to indicate that C. lanceolata 

 var. f lava is capable of agressively invading 

 disturbed areas such as roadbanks or rock 

 pits; it appears to be adapted to 

 undisturbed, moist montane grasslands and 

 herb meadows. 



I. 11. A. 3. Potential threatened destruction, 



modification, or curtailment of habitat or 

 range: Based on field observations in 1988, 

 the five known populations of Claytonia 

 lanceolata var. flava currently appear to be 

 stable. They are large, and cover extensive 

 areas. However, the sites are potentially 

 threatened by several land uses, including: 

 1.) road construction, 2.) mining, and 3.) 

 recreational use. Potential impacts from 

 grazing and timber harvesting are possible, 

 but it does not appear that these threats are 

 imminent. The sites that may potentially be 

 influenced by these activities are reviewed 

 below: 



1. ROAD CONSTRUCTION: All known sites 

 could potentially be impacted by 

 further road construction, and/or 

 maintenance of existing routes. 

 The habitats of all five 

 populations are partially bisected 

 by major U.S. Forest Service access 

 routes. If more roads are 

 constructed, it is expected that 

 additional portions of the sites 

 would be eliminated. The site 

 where potential road construction 

 seemed to be most imminent is 

 Vipond Park (003) ; the potential 

 for increased mining activity in 

 this area (discussed below) might 

 result in the construction of new 

 roads in the meadow habitats. 



