creek, representing a woody draw habitat which is not represented on the District. The 

 list of associated species in the study area follows: 



Amelanchier alnifolia 

 Apocynum androsaemifoUum 

 Carex hoodii 

 Carex sprengelii 

 Carex torreyi 

 Festuca idahoensis 

 Fraxinus pennsylvanica 

 Galium boreale 

 Pinus ponderosa 

 Poa pratensis 

 Prunus virginiana 

 Symphoricarpos occidentalis 

 Toxicodendron rydbergii 



2. TOPOGRAPHY: In the study area it was present in low-lying areas and 

 lower sheltered slopes. 



3. SOIL RELATIONSHIPS: Relatively deep loams. 

 POPULATION BIOLOGY AND DEMOGRAPHY 



1. PHENOLOGY: Lavender hyssop usually begins flowering by late June in 

 average years, but had barely begun by the second week of July in the study 

 area under relatively cool, moist growing season conditions. The long spike- 

 like inflorescence has indeterminate flowering, which may be prolonged for 

 several weeks under favorable conditions. 



2. POPULATION SIZE AND CONDITION: Populations were locally 

 restricted in the study area to single bands and clumps corresponding with 

 suitable habitat. The species is rhizomatous, so the number of stems is likely 

 to be greater than actual population size. In the study area, stem numbers at the 

 sites ranged from ca. 10-100. At the Richland Co. collection site, by contrast, 

 the species was described as locally common. 



3. REPRODUCTIVE BIOLOGY 



a. TYPE OF REPRODUCTION: Lavender hyssop reproduces by seed 

 and vegetatively by rhizomes. 



b. POLLINATION BIOLOGY: Insect-pollinated. 



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