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Varghese, Anto Puthur
- A Preliminary Taxonomic Study on the Major Grasses of Low Altitude Grassland of Thrissur
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Authors
Affiliations
1 Department of Botany, St. Thomas’ College (Autonomous), Thrissur, Kerala, IN
1 Department of Botany, St. Thomas’ College (Autonomous), Thrissur, Kerala, IN
Source
South Indian Journal of Biological Sciences, Vol 2, No 1 (2016), Pagination: 183‐190Abstract
Perumala Hill station of Thrissur, which we selected for the study, is peculiar for its geographic isolation from nearby areas, and no other nearby hill stations are present. These grass hills are about 103 m. of maximum elevation and 25 acre area. It is protected by worshiping old temple. We got attracted to the place also because of its classic scenic beauty of grasslands. Firing the land is an annual custom they following for years. Although the dominant grass species of the land flourish there year after year. Many rare plants like Habenaria diphilla, Habenaria marginata, Exacum tetragonum, Ophioglossum etc are seen there. To get an awareness about the dominant species of this area, we conducted quadrate studies, calculated Shannon's and Simpson's indices. From the plant list derived from the data in the decreasing order of density, grasses are found to be the major plants of this area. Taxonomic analysis of 7 major grasses was conducted from this area. Among this, Heteropogan contortus found to be having most density among them. Seasonal and climatic variations are very common in the grass species. H. contortus also shows such variation in this area. Arundinella mesophylla an endemic species reported from South India. This plant also found in this small area. The awn movements of A. Mesophylla and Eulalia trispicata are found interesting. The flourishing of grass species in this area due to fire resistance. The fire escaping mechanisms of this dominant species are the submerged rhizome, well developed seed dispersal mechanism and seasonal reappearance etc.Keywords
Low Altitude Grassland, Perumala, Themeda, Arundinella, Aristida, Eulalia, Heteropogon, Pennisetum.Full Text
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- Taxonomy of Selected Species of Cissus (Vitaceae) from Thrissur District
Abstract Views :159 |
PDF Views:16
Authors
Affiliations
1 Research department of Botany, St. Thomas College, Thrissur, Kerala, IN
1 Research department of Botany, St. Thomas College, Thrissur, Kerala, IN
Source
South Indian Journal of Biological Sciences, Vol 2, No 1 (2016), Pagination: 222‐228Abstract
Vitaceae (the grape family) consists of about 14 genera and 900 species primarily distributed in tropical regions. The family is well known for grapes (species of Vitis L.) and is economically and ecologically important because many species are major climbers in tropical and temperate forests. The grape family is characterized by leaf opposed tendrils, which may be modified to form an inflorescence. The present investigation is an attempt to study taxonomical attributes on the genus of Cissus in Thrissur district. Taxonomic studies were conducted so as to classify the plants of the genus Cissus found in Thrissur district. Cissus vitiginea, Cissus quadrangularis, Cissus latifolia, Cissus repens and Cissus heyneana were studied. Observations of the taxonomical peculiarities solve the species identification problem in Vitaceae.Keywords
Vitaceae, Cissus, Tendril, Ovary.Full Text
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