PYROLA APHYLLA: A MORPHOLOGICAL STUDY 251 
1898] 
the flowers in Pyrola minor, while in P. secunda and P. rotundifolia 
il the proper leaves have appeared during the year previous to 
the flowering. It is to be noted that a few rudimentary scale- 
like leaves occur also in these species, preceding and succeeding 
the proper ones. While the inflorescence is strictly terminal in 
the above mentioned species of Pyrola, Irmisch observed also 
lateral ones in P. chlorantha, and it is interesting to notice that 
these lateral inflorescences possessed only undeveloped leaves 
 attheir bases, 
In our plant, Pyrola aphylla, we have both terminal and 
lateral inflorescences, the terminal being, perhaps, constantly 
preceded by normal leaves (Z in fig. 1), which appeared during 
the year Previous to the flowering, agreeing in this respect with 
P. secunda, P. chlorantha, and P. rotundifolia. No axillary buds 
: = observed in the axils of the green leaves, a fact that 
a tunishes another illustration of the great resemblance which 
‘ists in the vegetative organs of Pyrola. The most conspicu- 
Sha character of P. aphylla, if we merely compare the vegetative 
: . in the scanty foliage of proper leaves, which, how- 
q cy me peome in part replaced by an unusually large num- 
ale-like ones. 
lf we ‘ompare our plant with Chimaphila, of which we have 
] C. umbellata and C. maculata, we shall find many 
a ls. We have al t we observed root- 
Shoots in bot e already stated that we o 
h of these species, and fig. ¢ shows the base of an 
C. maculata, with a young shoot pushing out from 
lateral roots (R.S.). The species of Chimaphila 
Ey eng horizontally creeping and branching rhizomes, 
thirds vg Specimen of C. umbellata reached a length of two- 
 DoWever meter. The aerial shoots of Chimaphila differ, 
Mentioned iy those of Pyrola aphylla and the other apeus 
kvelop “aah in that the proper leaves support buds, which 
ioe Ting the following year. | 
the in ia to the absence of scale-like leaves at the base of 
Nth seve oe and above the proper leaves, Chimaphila agrees 
. Tal of the species of Pyrola, but not with 7. minor and 
—Cplant of 
ME OF the 
also develop 
ich 
