738 
Telopea Vol, 6(4): 1996 
as long as water is provided. When drought-stressed as is undoubtedly the wild 
condition, the apical meristem dies: growth resumes from an axillary bud near the 
apex. Phyllotaxy is spiral and counterclockwise, and the metamers consist of the leaf, 
associated stipular spines, and axillary buds. The stipules do not arise on the apex 
with the leaf-primordium, but rather develop late in the second plastochron or between 
the second and third (Fig. 6b) on the flanks of the leaf-pnmordium proper. Subsequent 
growth is rapid, and the apical bud is more or less protected by the numerous spines. 
c d 
Fig. 5. Scanning electron micrographs of Lysiloma microphylliiin. a, apex of long-shoot (x 350); 
b, axillary bud (x 200); c, two axillary buds in a vertical series, the oldest bud distal to the 
youngest (x 35); d, apex of an axillary bud. 
