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Mitra, Krishna
- Ecological Observations along the River Banks at Allahabad, U. P.
Authors
1 Department of Botany, Banaras Hindu University, Varanasi-5, IN
2 Botanical Survey of India, Central Botanical Laboratory, Calcutta, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 6, No 2-4 (1964), Pagination: 137-140Abstract
This paper embodies the ecological observations made along the exposed riverbeds and the immediate banks of the rivers Jamuna and Ganga at Allahabad during thé months of April to June in 1962 and 1963.The physical features, climate and soil of the area are discussed.
Botanical composition of the vegetation and the relative abundance, preference for habitat, types, and phenology of the important species are given.
The vegetation is characterised by the preponderance of annual plants and consists of the species of the wet meadow and dry meadow stages of Dudgeon (1920). The thorn scrub Stage is represented by Acacia arabica and Zizyphus jujuba.
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- Karyotype Analysis of Chlorophytum tuberosum Baker and C. laxum R. Br.
Authors
1 Botanical Survey of India, Calcutta, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 10, No 2 (1968), Pagination: 228-228Abstract
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- Pollen Morphology in Bignoniaceae in Relation to Taxonomy
Authors
1 Botanical Survey of India, Calcutta, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 10, No 3-4 (1968), Pagination: 319-326Abstract
Palonological investigation of 49 species of the family Bignoniaceae distributed over 32 genera has been made. There is a great diversity in pollen morphological characters. The pollen grains may be united in tetrad as in Chilopsis saligna or free as in rest of the species.
The pollen grains may be atreme 3,4,7 zonocolpate, 3 zonocolporoidate, 3,4, zonocolporate, parasyncolpate, monoporate, pantoporate, pantocolpate or anomotreme. Similarly the exine pattern varies from obscure to reticulate with occasional occurrence of retipilate, baculate types. Taking aperture as major and exine pattern as subsidiary characters as many as twelve distinct pollen types have been recognised.
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- Contribution to the Pollen Morphology of the Family Capparaceae
Authors
1 Botanical Survey of India, Howrah, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 17, No 1-4 (1975), Pagination: 7-31Abstract
Present work deals with a detailed palynological investigation on 147 species distributed over 23 genera of the family Capparaceae. Most of these are Asian and African species with few American ones.Pollen characters have been found useful in the delimitation of subfamily, tribe and genera to certain extent. In certain cases interspecific relationship is exposed by correlating pollen and seed characters together.
This study will be helpful in the living and fossil pollen analysis.
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- Pollen Morphology in Relation to Taxonomy and Plant Geography of Resedaceae
Authors
1 Botanical Survey of India, Howrah, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 18, No 1-4 (1976), Pagination: 194-202Abstract
Pollen morphological studies on 5 genera and 23 species have been made in the present investigation. Resedaceae is a stenopalynous family. Out of the three tribes, the tribe Cayluseeae is quite distinct pollen morphologically due to larger pollen size, apertural granules and exine ornamentation. The tribe Resedeae and Astrocarpae show close affinity. Reseda arabica Boiss. has larger pollen grains and stands apart in the tribe Resedeae. In this character it approaches the Caylusea sp. of the tribe Cayluseeae but in other pollen character they differ.
The apertural granules in this family is interesting. Its nature, origin and significance will be useful.These apertural granules in this family suggest its closer relationship with the tribe Cleomae of the family Capparaceae from the palynological point of view.
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