Double rose: 
Boquet royal 0 o § 
Boquet tendre § §+° 
Czar Nicholas o §+ 
Dagmar § §+ 
Frederick the Great § §+ 
Globosa § §+ 
Grootvorst 0 § § 
Leo + §§ 
Le Grand Concurrent 0 § § 
Princesse Alexandra § 0 § 
Princesse Louise § §+ 
Venus de Medici + § § 
Double white: 
Boquet Royal §+§ 
Flevo §00 
Florence Nightingale + § + 
Grand Vainqueur +§+ 
YELLOW DISEASE OF HYACINTHS. 341 
Double white—continued: 
La Virginitéo 0 § 
Prince of Waterloo + § § 
Triumph Blondine o § § 
Double light blue: 
Madame Monmouth+ § § 
Rembrandt o § § 
Van Speyck +§ § 
Double dark blue: 
Crown Prince of Sweden 0 0 § 
Laurens Koster + § § 
Lord Raglan o § § 
Prince of Saxe Weimar 0 § § 
Double yellow and orange: 
Boquet d’Orange +§ § 
Minerva +§ § 
Sir Rowland Hill § § § 
Souvereign o § + (by letter §) 
Sunflower o § § 
Fig. 133.* 
La Tour D’ Auvergne +++ 
Princesse Metternich § §+ 
Tsabella o § § 
Double violet: 
La Victoire+§ § ; 
From the third grower I received the following letter and supplementary list of varieties: 
I have much pleasure in handing you a catalogue in which, according to your suggestion, are 
marked the hyacinths which are much subject to the yellow disease and such which are very resistant. 
It must, however, be understood that similar statements have only relative value. Many varieties 
which used to be among’ the best trade-sorts a few years ago, have now entirely disappeared in con- 
sequence of the yellow disease and it may be expected that the list of varieties after ten years will be 
very much reduced. 
The following list of hyacinth varieties shows those which have entirely or nearly dis- 
appeared in consequence of the yellow disease: 
Single red and rose: 
milius 
Ornement de la Nature 
Mrs. Beecher Stowe 
Unica spectabilis 
Duchesse de Richmond 
Single white: 
Madame de Stael 
Queen Victoria 
Miss Nightingale 
Single blue: 
Orondates 
Emilius 
Prinz Albert von Preussen 
Nimrod 
Siam 
Grand Vainqueur 
Argus 
De Candolle 
Porseleinen Scepter 
Priestley 
Ferruck Khan 
von Schiller 
Clio 
Single blue—continued: 
King of the Blacks 
The Sultan 
Single yellow: 
La Pluie d’Or 
Overwinnaar 
La Citroniére 
Single violet: 
Haydn 
Jesko . 
Sir Henry Havelock 
Double red: 
Regina Victoria 
Double white: 
Anna Maria 
van Hoboken 
Mont St. Bernard 
Emperor of the double Whites 
Double blue: 
Louis Philippe 
Lord Raglan 
Frans Hals 
Duke of Norfolk 
Double yellow: 
Jaune supréme 
*Fic. 133.—Detail from a cavity made by Bact. hyacinthi ina bulb-scale of hyacinth showing separatedand crushed 
cells lying in a mass of bacteria—cavity like that shown in fig. 132, but larger. Slide 507 B 6, third section fromright. 
Material collected by the writer at Haarlem in 1906. Gram’s stain modified by substitution of amylic alcohol for 
ethyl alcohol. Starch grains on bottom at right. 
