Giant Rosette Plants

Acaulescent Plants

The most typical life form of alpine tropical regions are the giant-rosette plants of the genera Lobelia (Lobeliaceae) and Senecio (Asteraceae) in Africa, Espele-tia (Asteraceae) in South America and Argyroxiphium (Asteraceae) in Hawai'i (Fig. 12.5). They may reach heights of several meters and have developed a number of morphological and anatomical features adapting them to the diurnal type of climate in their habitat. The tallest plant of Senecio johnstonii ssp. cottonii actually measured by...