326 
Timonius, DC. (1830). — Wahlenbergia yore (1814). 
Tinantia, Scheidw, (1839). “ Wallenia, Sw. (1788). 
1a 89) Watsonia, Mill (1759) 
wea, et Gray (1840) Wethea, Spreng. (1825) 
Tourreitia, Fougeroux (1787) Weinmannia, L. ( ) 
Tragus, [Halli] Scop. (1777) Welwitschia, Hook. f. (1862). 
Prichilia, [P. Br.] L. (1759). Wikstroemia, Endl. (1833). 
Trichodesme, R. Br. (1810). Wistaria, Nutt. (1818). 
Tricyrtis, Wall. (1826). Withania, Pauquy (1824). 
Trigoniasirum, Miq. (1860) 
Trinia, Hofim. (1814). 
Trophis, [P. Br.] L. (1759). Xanthophyllum, Roxb. (1814). 
ylopia, L. 
Uncaria, Schreb. (1789). Aylosma, Forst. £. (1786). 
Urceolina, Reichb. (1828). 
Ursinia, Gaertn. (1791). 
Zamia, L. (1763). 
Ventenata, Koel. (1802). Zantedeschia, Spreng. (1826). 
ernonia, Schreb. (1791) elkova, 2 ag 4 
Verticordia, DC. (1826). Zeugites, [P. Br. x Schreb. (1791). 
Villarsia, Vent. (1803). Zinnia, L. 176 
d. (1788). Zoisia, Willd. TIRE 
ochysia, 
Vriesea, Lindl. (1843). 
XLII._THE PHYTOPATHOLOGICAL SERVICE 
IN THE NETHERLANDS AND ITS COLONIES. 
J. C. Tu. UPnor. 
During the last decade the Phytopathological Service of the 
Netherlands has developed extensively throughout the country, 
and its activities are very numerous. Though it belongs to a 
small nation, it is the outcome of much painstaking work, and 
will not be found in such a high degree of development in any 
other country. 
Dutch scientists have long been engaged in investigations on 
plant diseases or pests, for instance Dr. Snellen van Vollenhoven 
(1843), and Dr. J. Wttwaal (1860); later came the very active 
and eminent plant pathologist, Prof. Dr. J. Ritzema Bos, who 
from 1869 to 1920 has been the chief leader in Holland from the 
standpoint of original research, plant disease control, lecturing 
and popularising the knowledge of plant —— among the 
masses of agricultural and horticultural people 
In 1895 the Phytopathological Laboratory. ** Willie Commelin 
Scholten” in Amsterdam was established out of private funds, 
Ritzema Bos being appointed Director, as well as Professor of 
Plant Pathology ‘at the University of Amsterdam. In his 
inaugural speech at the University, he pointed out that phyto- 
pathology should not be considered as a part of botany, but as 
an independent science. 
The main object of the institution was to study plant diseases 
and give advice and demonstrations to growers. The results of 
