198 
of all plant habitats to maintain. The only difficulty has been the 
encroachment of cranberry vines (l’accinium macrocarpon) and 
other hardy species, but this condition can be remedied by remov- 
ung species, 
— 
ing upper layers of the peat containing the encroac 
and replanting with less aggressive species. Three [European plants 
appeared in the peat and have persisted: Calluna vulgaris, Erica 
Molinia coerulea). 
— 
— 
cmerea, and the black heath-grass 
Since this bog must function for both northern and southern 
species, there has been some mixture of these two clements. 
Around the margins are coniferous trees: red spruce (Picea 
rubens), black spruce (Picea mariana), larch (Larix laricina), 
and swamp cedar (Chamacevparis thyoides), with an undergrowth 
of rhodora (Rhododendron canadense). These species actually 
mingle in some of the northern outposts of the swamp cedar, which 
— 
eh 
extends northward to central New Hampshire. In the bog itse 
are northern plants such as Calla palustris, Kalmia polifolia, and 
the small cranberry (laccinimm Oxaycoccus) ; some plants essen- 
tially of the pine-barrens, Sabatia lanceolata, the purple-flowered 
sundew (Drosera filiformis), redroot (Lachnanthes tinctoria), 
Lophiola aurea, Tofteldia racemosa, the fox-tail club-moss (Lyco- 
podium alopecuroides), and yellow-eyed grass (NX yris caroliniana ). 
Many, such as the pitcher plant (Sarracenia purpurea, Fig. 11c), 
the orchids Arethusa, Calopogon pulchellus (Fig. 11b), and Po- 
gona ophioglossoides (lig. 11f), and the common sundews (Dros- 
era rotundifolia and D. longifolia), are found both in the northern 
and southern parts of our range. 
At the border of the bog in damp sand grow the turkey-beard 
(Nerophylluim asphodeloides), which flowers only in occasional 
years, the sand myrtle (Leiophyllum buvifolium), the sand-barren 
gentian (Gentiana Porphyrio), the red milkweed (Asclepias rubra), 
and the turk’s-cap lily (Lili superbum) ; all these are coastal- 
plain plants. In peat adjacent to the bog (on the far side) will be 
found five interesting plants of the Melanthiuin group: fly poison 
(Aimanthim muscaectoxricum, Vig. 11d), swamp pink (Helonias 
bullata, lig. lle), Zygadenus lermanthoides (Fig. 4+, Map 6), the 
bog asphodel (Nartheciutm americana), which we have not yet suc- 
ceeded in bringing into flower, and blazing star (Chamaelirinm 
luteum, Fig. lla), the last-named usually confined to richer wood- 
jean 
lands. 
