196 
plant may be fairly symmetrical. Superbissima was unstable 
but it soon threw a still more compact form which proved also tc 
of viridissima. A compariso the names of these three forms 
will ear of their relationshi 
Nephrolepis exaltata bostoniensis Piersoni superb 
Neph tata. bostoniensis Piersoni superbissima muscosa 
eph. e bostoniensis Piersoni superbissima viridis 
Whenever a larger much divided form like elegantissima 
reverts the reverting leaves are like the original Boston form. 
en, however, a dwarf divided form reverts, the reverting leaves 
seem to retain the dwarf character. Th s happene the 
e forms described above are not all of the new types which 
have appeared at ar eon but are all those which have been 
put on the market. At p t there are a number o! of others 
ing one of these is illustrated in Pl. 
pacta, 1. e. 
Another point of interest lies in the fact that an almost identical 
form but of different oe is being introduced under the name 
of “ John Wanamaker " by Craig of Philadelph 
Tarrytown has ree referred to as the source > of many of the 
