On the Roots of Bignonia. 
BY 
T. G. HILL, 
National Scholar in Botany , Royal College of Science, London. 
With Plate XXII. 
PAVING had the opportunity of investigating the root- 
X 1 structure of a few species of Bignonia , it seemed desirable, 
as there exist some doubts as to whether the roots of these 
plants follow the anomalous structure of the stem, to put 
the results obtained on record. 
As far back as 1850 Criiger 1 drew attention to the curious 
tuberous growths found on the roots of Bignonia Unguis , and 
he also stated that the same anomaly occurred in the roots 
as in the stem. This was subsequently denied by later 
investigators. Thus Bureau 2 says, ‘ M. Criiger ... II a 
suivi, dit-il, ce developpement sur le Bignonia Unguis. J’ai 
pu examiner une racine de cette meme espece, et je dois 
dire que mes observations ne s’accordent point avec celles 
de M. Criiger.’ Further on in his monograph he states: ‘On 
ne voit point le tissu ligneux s’arreter dans son developpement 
sur quatre points opposes en croix, et le liber remplir les vides 
1 H. Criiger, Bot. Ztg., Vol. viii, pp. 109- iio. 
2 Bureau, Monogr. des Bignoniacees, 1864, P* I 49 * 
[Annals of Botany, Vol. XII. No. XLVII. September 1898.] 
