298 The Climbing Habit in Antirrhinum majus. 
Finally an examination of the tissues of a twining branch 
shows all those histological modifications characteristic of climbing 
plants, in which the habit has long been hereditary. 
We wish to express our thanks to Mr. H. G. Brierley for his 
kindness in taking the photographs of Fig. 2, PI. II. and Fig. 1, 
PI. III., and to Mr. S. L. Mosley for the drawings of Text-fig. 35, 
A and B. 
Biological Laboratory, October, 1909. 
Technical College, 
H uddersfield. 
EXPLANATION OF PLATES 
Illustrating the Paper by Dr. Woodhead and Miss Brierley 
on the Climbing Habit in ANTIRRHINUM MAJUS. 
Plate II., Fig. 1. The border of White Antirrhinums and Shirley Poppies in 
the garden at Grimscar, Huddersfield. 
Fig. 2. A thickened twining branch of Antirrhinum clasping a stem 
of Shirley Poppy. 
Plate III. Fig. I. Two twining shoots of Antirrhinum, the one on the right 
clasped in the centre by a branch from the specimen on the left. 
The lowest branch to the left has twined in a loose dextrorse 
spiral around the branch above ; the next two higher branches 
show complete coils. 
Fig. 2. A portion of a plant grown at Doe Royd, Almondbury, from 
seed of the White twining variety, showing that the climbing habit 
appeared in the next generation. 
Plate IV. Fig. 1. T. S. of a fairly young twining branch of Antirrhinum. 
X 25. 
Fig. 2. T. S. of vascular bundle of ditto on convex side of the coil, 
x 120. 
Fig. 3. T. S. of vascular bundle of ditto on concave side of the coil, 
x 120. 
