IJSRP, Volume 2, Issue 9, September 2012 Edition [ISSN 2250-3153]
Adani Lokho, Yogendra Kumar
The present paper deals with sixteen species of Indian Dendrobium Sw. from the Northeastern regions which are economically important from aesthetic value related industry. The detailed morphological characterization and the reproductive phenology are discussed. Vegetative characters reveal sizeable variations among the species which can be differentiated from one another. The height of the psuedobulb stem with nodes and internodes ranges from 15 cm to 130 cm, the maximum height was recorded in D. moschatum. The sessile lanceolate leaves with a maximum length were recorded in D. moschatum. The longest inflorescence was found in D. clavatum, interestingly in Dendrobium the longer the inflorescence the more the numbers of flower bearing. The flowers were exquisite and showy which exhibit different shapes and colours, the largest flower was recorded in D. formosum. Most of the species began to sprout new shoots during spring season. The low temperature, rainfall and humidity promote the flower bud initiation except in D. nobile, and D. heterocarpum favoured by moderate temperature and high humidity. The longevity of the flower ranges from 5 to 23 days with a maximum recorded in D. formosum. Post fertilization phenophase is the longest period exhibited by all the species under study, for instance seedpod initiation to maturity ranges from 56 to 120 days.