208 
duce elongate runners which root and continue growth if soil con- 
ditions are favorable, the older portions of the plant gradually 
dying off. Probably mycorrhiza plays an important part. 
Schisaca pusilla (Figs. + and 14). The curly-grass fern lives 
for two or three seasons, and then dies off. In the pine barrens it 
grows on old cedar stumps just above the surface of the water, or 
fda 
s sun- 
hight, constant humidity, and freedom from the competition of 
other species. 
on the moist edges of cranberry bogs. It apparently neec 
— 
Habenaria psycodes and other orchids of this genus. These per- 
sist and flower for one or two years only. Perhaps the soils are 
not yet mature nor the atmospheric conditions conducive to their 
growth. Except for the yellow lady's shpper and the bog orchids 
previously mentioned, it is probably unwise to attempt the growth 
of native orchids unless one has a fairly exact duplicate of natural 
conditions. ven the pink Cypripedium acaule, which is locally 
so abundant on Long Island, tends to bloom less and less each 
year in our plantings, though we have clumps that have been flower- 
ing for six vears. 
Pyxidanthera barbulata, Clumps of the ‘‘pyxie moss” have not 
succeeded for more than two years, after whic 
— 
1 the plant dies out, 
though our climate is not much more severe than that of South 
Amboy, New Jersey, where the plant grows wild. 
Polygala paucifolia. Vhe fringed polygala is so abundant. in 
varied types of soil that one would expect it to grow asily. 
Neither this species nor Polygala polygaina nor P. lutea persists 
with us for more than a single season. 
— 
Castilleja coccinea. The searlet painted cup is occasional in 
meadows in northern New Jersey, but like many other members of 
the Serophulariaceae it is probably partially parasitic on the roots 
of other plants. 
Trillium cernuum. Vhe nodding trillium, though growing in our 
region in rich humus below ledges and sometimes in damp soil at 
the edges of swam 
— 
ys, has not been at all successful; other species 
of Trillium of our region grow readily. 
O.valis violacea. The violet wood-sorrel grows in open wood- 
land on the terminal glacial moraine, and in humus on dry shale 
