300 DR. P. GROOM ON THE LONGITUDINAL 
respectively. The subcurves are certainly consistent, though they show an undulating 
form, and in each internode-curve there is, in the first two-thirds, a clear indication 
of the two subcurves acting in the reverse manner at each point—that is to say, when 
the one rises the other falls. The internode-curves thus indicate leaf-displacements, 
while the subcurves, though they harmonize with the view that the phyllotaxis was 
originally opposite, yet are not sufficiently regular to confirm this view strongly. 
Measurements :— 
Branch I: 3:5, 2°5, 6, 2°75, 4, 2°75, 2°75, 5'5, 1, 5°75, 2, 2, 5°5, 2, 3'5, 4, 25, 5, 46, 
45, 3, 4°75, 5, T5, 4, 9, 7°5, 45, 675. 
Branch I': 3°25, 1, 65, 8:5, 3:5, 8, 3, 6, 1, 5°5, 25, 2'5, 5-5, 2'5, 3°25, 5, 2:75, 5'5, 278, 
2°75, 7, 65, 3:5, 5, 8:5, 4°5, 11:5, 5:5, 2-5 (young). 
EXPLANATION OF CURVES. 
Excepting where specially indicated, the plain lines denote internode-subeurves, while the dotted lines 
denote displacement-subcurves. 
Atriplex rosea. 
Page 278. lm. Main stem of Specimen Iss. ^) 
li. lst branch of 
2nd » 
lir. 3rd 
4th s 
li. 5th 
5th* 
6th = 5 J 
Page 274. 2m. Main stem of Specimen I:. ~ 
21. lst branch of - | 
2nd 
> Natural size. 
2m. 3rd » » > Natural size. 
4th fe A 
3 i. 5th 5 n | 
6th 5 » 
Page 275. 3m. Secondary (relatively main) axis of Specimen 192. J 
31. Tertiary axis 1 (lst branch) of Specimen 192. 
3n. H 2 (2nd branch s 
3 mi. » 3 aa aes : Roiara ma 
31v. " 9 (5th branch) » 
3v. » 9' (accessory 5th branch) of Specimen 192. 
