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H G Prashontha Kumar and K Krishnoswomy
Issue: 2014, 28 ,91-97

During the present study, preliminary epidermal studies were made in ie., Acampe ten species of epiphytic orchíds belonging to seven genera praemorsa (ROxb.) Blatt. & McCann, Coelogvne breviscapa Lindl.. C. nervosa A.Rich., Cottonia peduncularis (Linal.) Reichb,f., Fllckingeria nodosa (Dalz.) Seidenf., Luisia nacrantha Blatt.& McCann, Luisia zeylanica Lind., Pholidota pallida Lindl., Rhvnchostylis retusa (L) BI, and Sarcanthus pauciflorus Wiaht. Hypostomatic condition was common in most of the selected orchids irrespective of the genus. Most of the orchids were having paraCvtic and anomocytic type of stomata. The stomnatal frequency ranged trom 490.12 to 16353.22 per mm?: the highest stomatal freguency (16353.22) was recorded in FllCKengiria nodosa and lowest was recorded in Coelogyne nervosa (490.12) Interestingly. a higher stomatal index was observed in C. nerv0Sa (14.32) and lowest in hhynchostylis retusa (3.45), Relationship between atomnatal size and stomatal frequency was noticed in tne nresent study. The stomatal size was inversely proportional to stomatal frequency.