a ten eee are ernie. * | 
Bol 
iixphanarion or Texr Figures anp Pate, 
Lext Figure 1.—Semidiagrammatic vertical section pees: h 
u small conidiophorous stroma, a—conidiophores; b—slightly 
more solid cushion of tissue which resolves into conidiophores ; 
eas mycelial structure free from host elements; d—complex 
hyphae, erystals and cortical cells; anaes ramifying 
in ae cortical tissue. 
Text Figure 2.—Diagrammatic representation of cortex with 
A—conidiophorous stroma; and B—true sclerotium. A: a— 
conidiophores; b—-coni iophore cushion; c-—loose hyphal tissue ; 
d—complex of fungus and host elements; e—cortical hyphae 
massing together to form the stroma ; k——lenticular tissue pushed 
outwards; n—hyphae in cortex; o—cambium; s—bast fibres; 
g—lacuna i in cortex filled by pseudoparenchymatous mass of my- 
celium. : f sclerotial skin ; g—dense tissue of sclerotium ; 
h—loose internal tissue; p—scle erotial ring from which the dark 
skin is absent; m—unbroken surface of bark. 
EXPLANATION OF PLATE Vii. 
Fig. 1.—a—diseased zone showing Botrytis Ldoninrnags The 
young pustules are situated at the margin of the zone, and the 
mature ones in the middle. Their distribution corresponds with 
that of the agen: b—healthy stem shewing tumescent lenti- 
cels; c—dry stem in which the lenticels may only be seen with 
difficulty ; d—wound-callus occluding old cea and giving 
rise to vigorous adventitious shoots. 
Fig. 2.—General appearance of tree immediately after removal 
from ground. a—diseased zone; b—whorl of developing shoots ; 
c—-soil level. oe ee portion of the tree is in a thoroughly 
desiccated conditi 
Fig. 3.—Radial longitudinal section through diseased zone; 
aca—upper limit of fungal growth ; bdb—lower limit of ungal 
growth; e—wound callus tron which the new v, shoots spring ; f- 
stroma. Note the Seyniel of the upper region wot the section and 
the cortex splitting away from the wood. The hollow in the 
centre of the section represents the position of the pith. 
XXXV.—THE GENUS COCOS. 
In 1886 Dr. O. Beccari published in Malpighia vol. i. p- 
a preliminary study of the palms included in the genus Cocos, 
Linn.; he has now supplemented this a revision, olga 
in the L’ Agriculture Coloniale, x. p. (Florence, 1916), in 
which nine distinct genera are oe . and distinguished as 
in the key reproduced below arbosa, Arecastrum, Butia and 
Glaziova, regarded as keh in the earlier publication, are 
now raised to generic rank, but the name Giaziova, Mart. (1871), 
has been replaced by that of Syagrus, Mart. ( 1824), in order to 
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