Notes. 
627 
is densely covered with green columnar emergences, whose cortical 
cells contain chlorophyll, starch, tannin, and a substance giving the 
reactions of a fat. Irregular masses of a similarly reacting material 
are frequently found covering the cuticle. 
A single stoma occurs on the free surface of each emergence, and 
in the embryo of this species stomata are confined to the emergences. 
The cuticle covering the general epidermis is continuous over the 
guard-cells of each stoma, except for a small oval slit which allows of 
communication between the intercellular space and the air. The 
stomata thus suggest either a xerophytic habit for the plant or an 
abnormal function for themselves. 
The emergences flourish during the germinating (epiphytic) stage, 
and later, when semi-parasitism is achieved, cease to be functional. 
II. Mode of penetration into the host of L. neelghere 7 isis. — Unlike 
many species, L. neelgherensis develops no well-marked organ of 
attachment (suctorial disc) at the free end of its hypocotyl. 
Where much resistance to the entry of the sucker is offered by the 
host, there are formed at the edges of the attached surface of the 
hypocotyl a series of acropetally arising, hair-bearing cortical ridges. 
The later-formed ridges, wedging themselves in between the older 
ones and the bark, force these older ridges away. The firmly-attached 
hairs of each ridge so forced away tear off masses of the bark, and 
thus the softer tissues, through which the sucker readily and cleanly 
bores, are exposed by instalments. Where the sucker comes in 
contact with lignified structures, dissolution is more gradual, and stages 
of disintegration (erosion figures) are to be observed. 
In L. loniceroides , where a well-marked suctorial disc is formed, 
attachment occurs once for all. This attachment is maintained (1) by 
the growth of the edge of the disc hard against the bark ; (2) by the 
outgrowing hairs forming a matted sclerotic mass firmly fixed into 
the outer layers of the host. p yy KEEBLE 
PRELIMINARY NOTES ON FLORAL DEVIATIONS IN 
SOME SPECIES OF POLYGONUM h— The genus has long been 
known to show considerable departures from the arrangement and 
number of parts accepted as most typical (Per. 5. St. 5 + 3, C. 3), 
such as is found in P. Convolvulus. Eichler’s ‘ Bliithendiagramme/ 
1 Abstract of a paper read before Section K at the Liverpool meeting of the 
British Association, 1896. 
