1913] RIGG—EFFECT OF BOG WATERS 315 
rotundifolia has disappeared, which was fairly common in this 
bog in 1908. It is a small bog, about 100 by 200 m. in extent. 
For convenience it will be referred to as the Seattle bog. 
The largest bog studied is situated about 1760 m. east of Henry 
Station on the Seattle-Everett interurban railway. The undrained 
portion of this bog is perhaps 16 hectares in area, and its flora is 
typical, including Drosera. In addition to the usual bog plants, 
Pinus monticola is common, and Trientalis arctica is found along 
the border. The natural contour of the region is such that there 
is some drainage from the northern end of this bog into a small 
creek, and that portion of it lacks Drosera and Pinus and has 
Lysichiton kamtschatcense. This bog will be referred to as the 
Henry bog, 
The bog situated about 5280 m. southeast of Fauntleroy Park 
in Seattle is a little smaller than the Henry bog. Its area is esti- 
mated at about 10 hectares. Drosera is abundant in it, and 
Trientalis arctica is common along its margin. This bog will be 
designated as the Fauntleroy bog. 
The bog situated at Echo Lake station on the Seattle-Everett 
interurban railway is slightly smaller even than the Seattle bog. 
It is on the margin of Echo Lake and its edge forms the bank of 
the lake for a short distance. The bog flora is typical right up 
to the open water of the lake; Drosera is abundant, and Comarum 
palustre is found on the border of the lake immediately adjacent 
to the bog. This bog will be called the Echo Lake bog. It is 
about 8800 m. distant from the Henry bog. 
The bog that will be referred to as the Green Lake bog is situated 
just north of the city limits of Seattle. It is a little over 1760 m. 
north of Green Lake, which is entirely within the city limits. 
There is now remaining only about 0.4 hectare of this bog; formerly 
it was about 12 hectares in extent, but nearly all of it has been 
Stripped of its original vegetation and drained. A good deal of it 
has been divided into small garden tracts and some of these are 
now under cultivation. The uncleared portion is drained by road- 
side ditches on two sides; water flows freely from the bog into 
one of these ditches during the rainy season and there is consider- 
able seepage into the other one. This bog still has the typical bog 
