the male organs of certain other
orders,) than the ramenta on the stipes. These are never entirely brown,
the end cell alone is coloured, but though occasionally tinged with
brown, they are filled with some fluid (even this is not so at first,)
but do not appear to open. I believe that subsequently all become highly
tinged with brown, but what increase of growth they subsequently undergo,
I know not. The terminal cell is always solitary, very often attached to
the one next it, which is generally single, obliquely placed,
occasionally looking like the dimidiate calyptra capping a young seta.
The number of cells forming the base, or dilated part varies, but is
always small in proportion to the larger ramenta, or protecting scales:
these last have a single terminal cell, which in fact must be the same in
every really cellular growth _sooner or later_, the last degree of
formative power being the production of a single cell.

At a subsequent period, still an early one, the terminal cell is fuscous-
brown, and this colour then extends to the next in various degrees, but
if it reaches the basilar ones at all, it does so at late periods. The
base of the terminal cell, and parts of the parietes of the next and
next, present a coagulated appearance, precisely as in certain mosses.

No such thing as a petiolate leaf occurs in acrogens, all are attached by
a broad base? Of acrogenous leaves, those only are leaves whose
attachment is at right angles with the stem; the rest are divisions of a
frond. Thus far with the ramenta. The divisions of the frond, are, I
find, not gyrate, but rather cochleariform involate. The future
reproductiveness is settled at a very early period, and is
distinguishable under the microscope by a sort of _margination_ of the
frondlets. In the earliest stage I have looked at, the margin is
greenish, striated by narrow cells, and passes into the body of the leaf
gradually; the greater development is perhaps central; even now the bulk
of the cells of the leaflet have green granules, and are opaque from air.
The vessels are marked out, or at least their future course, and along
them the opacity from air does not exist, so that the veins appear
depressed.

The next stage presented a greater development of an isolation of the
margin, but no other change. The next presented an isolation of the
margin, which remains almost white, the other part being green, but more
so because of a thickening as it were