1910] Fernald and Wiegand,— Botanizing in Maine 119 
arctic-alpine sedge as Scirpus caespitosus (which with us is usually 
caleifuge) growing together, but they are common on Caribou Bog and 
also in Bergen Swamp. Similarly, in the Wayne County marshes 
and in Caribou Bog are other strange companions: the calciphile 
boreal Drosera linearis, the caleifuge boreal Eriophorum callitrix 
and Andromeda glaucophylla, the characteristic prairie orchid, Habe- 
naria leucophaea, and the chiefly coastal Carex exilis; while in the 
Wayne County marshes and in Bergen Swamp, though not at Crystal, 
is the coastal Myrica carolinensis. 
These three bog-areas, then, are very similar in their vegetation and 
are characterized by a remarkable aggregation of rare or local species 
derived from very dissimilar floras: some of the species being char- 
acteristic of the prairies of the interior, others as typical of the Atlantic 
coast or even of our salt marshes; some well known northern calciphile, 
others ordinarily as distinctly calcifuge species. The association of 
these plants, especially such species as Triglochin maritima, Phrag- 
mites communis, Scirpus caespitosus, Tofieldia glutinosa, Habenaria 
leucophaea, Arethusa bulbosa, Drosera linearis, and Lonicera oblongi- 
folia, some of which are entirely unknown on other bogs of New 
England and New York, indicates some common feature of these 
bogs which it will be very enlightening to work out. A somewhat 
similar association of plants, with a slight variation in the exact species, 
occurs in some of the marlv bogs on the coast of the Gaspé Peninsula, 
where there is a remarkable mingling of marl-swamp types with the 
characteristic plants of sphagnum bogs and even of brackish or saline 
shores. Whether in these marshes there is a rare combination of cal- 
careous, saline, and peat-bog conditions is a matter which awaits 
further study. 
From Crystal we returned to Pembroke, spending our last week 
there in collecting the fruiting Blackberries and Thorns and in closing 
off the summer's work. On the way back to Boston we were tempted 
by the extensive outcrops of limestone in the neighborhood of Rock- 
land to visit that city of lime-quarries with the hope of finding interest- 
ing coastal plants. In this, however, we were not wholly satisfied, for 
the rock seemed. very hard and the soil sterile as compared with the 
softer limestones and limy slates and the extremely fertile soil we had 
just seen in Aroostook County. Being somewhat disappointed by the 
comparative sterility of the Rockland region we cast about for some- 
thing better and decided to spend our last half-day of field-work in 
