It has been fragmented and depleted by urbanization and agricultural conversion. There are only a few occurrences in protected areas, and the level of protection and management in some of these areas is insufficient. Development pressures, including the establishment of new woodlots, seriously threaten remaining occurrences of this community. This community occurs on dry sites over inactive colluvial and sometimes morainal parent materials. Soils are shallow, mostly sandy loamy, often with moderate coarse fragments, and are classified as Sombric Brunisols.
Soil moisture is rated as very dry and the soil nutrient regime is rich to very rich.
This community is restricted to low elevations along southeast Vancouver Island from Bowser to Victoria, and may also occur on the southern Gulf Islands. Elevational limits range from near sea level to approximately 150 m. It is now considered to be extirpated from the State of Washington. All stages Selected references Eng, M. 1992. An analysis of gaps in representation for conservation purposes. Erickson, W.R. 1996.