AN ACCOUNT OF LICHENS ON FALLEN TWIGS OF THREE QUERCUS SPECIES IN CHOPTA FOREST OF GARHWAL HIMALAYAS, INDIA

摘要

The association of epiphytic lichens on the fallen twig of three common Quercus species viz. Quercus semecarpifolia, Q. floribunda and Quercus leucotrichophora from the moist temperate forest of Chopta region, Rudraprayag District of Garhwal Himalayashas been discussed. Q. semecarpifolia exhibits the maximum growth of lichens on its twigs represented by 29 species followed by Q. floribunda and Q. leucotrichophora with 16 and 12 species respectively. The twigs of diameter classes more than 4.1 cm inQ. semecarpifolia and Q. floribunda bear the maximum individuals of lichens represented by 148 and 71, while in Q. leucotrichophora the twigs 3.1-4.0 diameter class exhibit maximum 82 individuals. All the three oak species exhibit luxuriant growth of Parmelioid lichens on their twigs.