Structure (par classes de circonférences) et régénération de quelques populations xérophiles du Sud malgache

Abstract

The structure of populations (classes of circumferences) was studied in six of the most representative species of the South Malagasy vegetation (Didierea madagascariensis, Alluaudia comosa, Euphorbia laro, Euphorbia fiherenensis, Euphorbia alluaudii ssp. oncoclada, Euphorbia stenoclada). The dynamism of these xerophytes varies with soil nature. Their regeneration is always difficult and would occur only during rainy years with regular rain distribution. © Société botanique de France 1994.