120 BOTANICAL GAZETTE [avoust 
lowed, but evidence points to the time requisite for the seedling to” 
reach blooming age as being five or six years. Seeds of the crop ol 
1go1, which in October of that year were placed in sphagnum in ¢ 
loosely covered glass vessel, germinated in July 1902, and now, after — 
33 months, have no pitchers measuring over 2™™ in diameter. The — 
kept would make it inadvisable, however, to draw from them any 
general conclusions as to the rate of growth in the scedlings under 
natural conditions. The great number of intermediate stages in 
growth between the seedling and adult which may be observed in a ~ 
single locality at any one season would also argue for the slowness — 
of the plant in reaching adult size. 
The stem growing-point of the adult plant is more broadly dome 
shaped than that of the seedling, but is identical with it in the mode 
of origin of the dermatogen, periblem, and plerome. The earliest 
primordium of the leaf is likewise more massive than in the seedling, 
but essentially similar. Its form is conical, with a broadly semi- 
circular base embracing the growing-point. Near the summit, upon 
the side toward the growing point, is developed the narrow pit which 
is destined to form the cavity of the pitcher, its origin being due 
wholly to a difference in the rate of growth of the tissue at the bottom 
of the pit and that forming its sides (fig. 54). BArtLon‘ in a brie 
note on the development of a Sarracenia (species not mentioned) 
has described this early stage and called attention to its similarity 
to an early stage in the development of peltate leaves, averring that 
“La membrane qui tapisse intérieurement l’urne n’est autre chose 
que l’épiderme supérieur de la feuille.”” This may be an entirely ‘ 
superficial analogy, or it may be a hint as to the ultimate origin 
such a markedly modified leaf. Gorset (/. c.) has figured the early 
leaf primordium of S. Drummondii, which is essentially like that 
S. purpurea. 
With the continued growth of the leaf rudiment the pit becon 
deeper, and its mouth becomes vertically elongated, although remain- 
ing very narrow. At stages somewhat earlier than that shown ™ 
fig. 55, the sides of the mouth of the pit have come together, clos- 
ing it completely. Fig. 55 represents a leaf primordium in which 
4 (Note on the development of leaf of Sarracenia) Adansonia 9: 380. 1879- 
