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said to extend to Delaware County. Linnaea borealis var. 
americana and Chiogenes hispidula were abundant in hemlock 
and spruce thickets surrounding the bog. 
An informal meeting at Dr. Gundersen’s concluded the day’s 
program. Here we were visited by a terrific thunder storm, the 
lightning flashes disclosing the peaks of the Catskills as in day- 
light. 
August 28, Friday. A second visit to the bog for the benefit 
of those who had not previously seen it, was followed by the as- 
cent of Blackhead Mt. from the north. This mountain is much 
steeper than Hunter or Overlook and the vegetation of the 
slope has a more northerly aspect. For example, 7 rilium un- 
dulatum occurs down almost to the base of the mountain; on the 
other hand Polystichum Braunii did not make an appearance. 
Streptopus amplexifolius in a deep ravine and Amelanchier Bar- 
tramiana on exposed rock were perhaps the most interesting 
species on the north slope of Blackhead Mt. Linnaea borealis 
var. americana, occurring in patches on the summit, seems to be 
comparatively rare in the Catskills. 
H. K. SVENSON 
Brooklyn Botanic Garden 
