204 MR. B. I. LYNCH ON A CONTRIVANCE FOR 
Another peculiarity of Buddleia auriculata is its tendency occa- 
sionally to produce supraaxillary branches and a plurality of buds 
in one axil, the uppermost being the oldest and most advanced in 
development. The position of the first bud or branch above the 
axil of the leaf is due, not to any fusion of the bud with the axis 
from which it springs, but to the circumstance that the bud, not 
becoming detached from the stem, is “uplifted” with it as it 
grows in length, and hence, after a time, it is found to be at some 
considerable distance from the axil oftheleaf*. The buds formed 
below this—of which I have seen as many as three in one vertical 
line, the topmost being the largest—do not in general extend into 
shoots, although they are capable of doing so under favourable 
conditions, as I have seen in Buddleia globosa. For other instances 
of multiple buds, the papers of Guillard in the * Bulletin de la 
Société de Botanique de France, vol. iv. (1857), p. 937, and of 
MM. Bourgeois and Damaskino, in the same publication, vol. v. 
(1858), p. 598, may be consulted. The latter authors cite Budd- 
leia among the genera in which multiple buds occur. 
On a Contrivance for Cross-fertilization in Roscoea purpurea; 
with incidental Mu to the structure of Salvia Grahami. 
By R. Inwis Lyn, A.L.S., Curator of the Botanic Garden, 
Cambridge. 
[Read November 17, 1881.] 
I mave the pleasure of describing to the Society an interesting 
form of floral mechanism by which cross-fertilization is secured 
in Roscoea purpurea, one of the Zingiberacee. It is more parti- 
cularly interesting when compared with the well-known mecha- 
nism of Salvia. In both cases the pollen is brought into contact 
with an insect entering the flower by means of levers which are 
specialized from the anther part of the stamen, and in both cases 
the filament forms the fulcrum. So far, the action is similar; and 
to this extent the comparison seems of interest on account of 
showing a similarity of apparatus in plants so far from being 
related as are Roscoea and Salvia. No further comparison can 
be made, however, on account of widely different structure. The 
* Asimilar upraising of the bud and consequent supraaxillary ramification 
is seen, constantly or occasionally, in Buddleia curviflora, B. asiatica, B. macro- 
stachya, the inflorescence of B. Colville’: see Hook. f., Ill. Him. Pl. t. 18. 
