Variaciones intratalinas de las sustancias liquénicas con la edad en Lasallia pustulata (L.) Mérat

The distribution of lichen substances within the tallus ofLusalliapustulam (L.) Merat, and the variation in concentration of these substances with thallus age was studied using high performance liquid chromatography. Lecanoric and gyrophoric acids were presents in greatest quantity per unit weigh at the thallus periphery and also in the youngest thalli studied.