Plate L 
Plate IL. 
Plate III 
Plate IV. 
Plate V. 
Plate VI. 
Plate VII. 
Plate VIII. 
Plate IX. 
Plate XxX. 
Plate XI. 
Plate XII 
Plate XIII 
Plate XIV. 
ILLUSTRATIONS. 
Cankerpatch on Hevea caused by artificial infection 
with Phytophthora Faberi MAuBL . 
Stripe-canker (light from) on Hevea caused Dy artificial 
infection with Phytophthora Faberi MAUBL … 
Stripe-canker (serious form) on Hevea caused by artificial 
infection with Phytophthora Faberi MAUBL. 
Conidia of Javanese Phytophthora-species. 
1. P. Nicotianae. 2. P. Faberi 3. P. Jatrophae. 
4. P. Colocasiae Magnified 900 X : 
1. Oöspore-formation of Phytophthora Iatan 
2. Oöspore-formation of Phytophthora _Cactorum 
SCHROET. 
3. Chlamydospores of Phytöphthora Jatrophae JENSEN. 
Real peas in the three lower leaf-scars of the part of 
a Hevea-stam. 
Two burred Hevea-trees, abel 12 years, as en Ek 
of canker . 
Hevea-stam cut at the desa but ded ee a pea. 
The connection of the dormant bud with the pith is 
intact, therefore the bud is still living 
To the left real peas from leaf-scars, to the right as 
as a result of canker in Hevea. ; 
Hevea-stam with adventitious buds on innen pro- 
jecting parts . . .… 5 
Burr-wood from pen, EEE bat 
Beginning of burr-formation. Forming of a mbs 
cambium round the dead cells in the bark. 
Magnified 200 > 5 
Burred tree. The central wood De an ienlee eee 
Transverse section of the burred tree of plate XII. No 
secundary burrs in the cortex, but the central wood has 
an irregular surface . 
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