STRUCTURE OF LATHR#A SQUAMARIA. 259 
supplied by the leaves themselves, in a manner to be described 
later on. In fact, each rosette of branches may be looked upon as 
a biennial plant; for although the organic connection between the 
fascicle remains, yet each after flowering becomes brown and soon 
ies, but persists in a carbonized condition for some years. 
the cells petits out as root-hairs; a broad band of cortical 
with imperfect spiral or annular thicke enings, the central ones 
large, prismatic, and coarsely reticulate, ee into scalariform 
and pitted types. The haustoria or dises are best — on the 
t i min: rstitial, 
sometimes so numerous as to give a moniliform cose oe a he 
rootlets ; they are always minute, rarely exceeding a line in 
diameter. The parenchymatous cells are large, with conspicuous 
. e 
absorbs nutriment. This catatals is evidently affected by the 
secretion of some corrosive substance acting on the cell-w 
host, their structure being destroyed and reduced to a homogeneous 
mass in the neighbourhood of the parasi 
Tannic acid is present in every under ground part of the plant, 
and can also be — in the ieinteprated parts of the host, and 
the host, and consequently the direct result of some irritation 
tovalt about by this contact, although the terminal discs ma. 
seen in various stages of development up to the obovate shape, 
without contact with the host-plant. 
Tron is also present in 1 the plant, and the dark colour assumed 
when old or dried — ars to be due to a combination of this 
element with tannin 
The leaves are fle shy, often exceeding three lines at the 
thickest part; generally broader than long, reniform, or with the 
apex more or less produced; sessile, attached by a 
upper surface flat or concave, lower convex 
aid tastes ole lia. « Ze 
