M. Thomasson, STRUCTURE (CIRCUMFERENCE CLASSES) AND REG ENERATION OF SOME POPULATIONS OF XEROPHYTES IN THE SOUTH-WEST OF MADAGASCAR, Acta botanica gallica, 141(6-7), 1994, pp. 769-779
The structure of populations (classes of circumferences) was studied i
n six of the most representative species of the South Malagasy vegetat
ion (Didierea madagascariensis, Alluaudia comosa, Euphorbia laro, Euph
orbia fiherenensis, Euphorbia alluaudii ssp. oncoclada, Euphorbia sten
oclada). The dynamism of these xerophytes varies with soil nature. The
ir regeneration is always difficult and would occur only during rainy
years with regular rain distribution.