288 
T. W. Woodhead and M. M. Brierley. 
In a few cases the older plants were too weak to maintain an erect 
position and resembled in habit the ascending stems of the Mint. 
In Text-fig. 34, A, the upper internode of a branch has made two 
complete, though somewhat irregular, dextrorse turns around the 
flower stalk of a Poppy and then continued an erect course. 
On the other hand in the specimen shown in Text-fig. 34, B, the 
coil has been developed in the lowest internode ; this has made a 
nearly complete sinistrorse turn around one of the branches of the 
same Antirrhinum plant, not shown in the figure, then turned back 
in the opposite direction, but not in the same plane. 
In Text-fig. 34, C, a coil is strongly developed in the first inter¬ 
node, but quite near the base, where it has made a nearly complete 
sinistrorse turn around a slender Antirrhinum branch, then 
suddenly reverses its direction like the one in Fig. 34, C, and 
continues obliquely across the stem, around which it forms part of 
a loose coil. On the way it crosses the opposite branch which in its 
turn has curved steeply around the stem to the opposite side. 
In Text-fig. 34, E, are shown twining branches from the upper 
part of the stem where the leaves are alternate. The branches 
arising in the axils of the leaves at these two nodes have behaved 
in a manner similar to those in Text-fig. 34, C ; in each case, after 
making a basal coil in the first internode, the rest of the shoot 
crosses over to the opposite side of the stem. 
The branch shown in Text-fig. 34, D, has twisted in such a way 
as to form a figure 8. Although such branches not uncommonly 
clasp adjacent stems or leaves, they more frequently develop 
these coils quite independently and clasp no support whatever, so 
that we cannot attribute the twining habit to the stimulus 
produced by contact with an adjacent branch. 
In October, 1908, sixty cuttings were taken from this white 
variety of Antirrhinum and planted as usual in a cold frame and 
labelled. On May 13th of this year (1909) forty of these were 
planted out in the border above mentioned. The plants were small 
(4—6 inches high) and had not as yet developed lateral branches. 
These were kept under observation and by June 13th, lateral 
branches had freely developed, and of the forty plants in the border, 
twenty-five on this date showed signs of twining. In one case, both 
branches arising in the axils of a pair of opposite leaves, had each 
made a complete tight coil around the base of its subtending leaf, 
one of these passed twice around the stalk of its subtending 
leaf, clasping it closely in a double coil. Both these branches 
