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Safui, B.
- Effect of Photoperiod on Annual Growth Cycle of Two forest Tree Species at Seedling Stage
Authors
1 Botanical Survey of India, Howrah, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 10, No 1 (1968), Pagination: 84-89Abstract
The seedlings of Pterygota alata and Manilkara bojeriwere exposed daily to normal day length (ND), short day (SD) and long day (LD) conditions. Relative rates of extension growth were calculated under each treatment.Under ND conditions, Pterygota plants assumed dormant condition from November to March with major part of season's growth occurring in August-September. Manilkara plants under similar conditions, continued to grow though the growth rates declined progressively and were of lower order during December-January.
Under LD treatment, Pterygota plants became dormant one month later and resumed growth about two months earlier than ND plants; SD conditions, however, brought about dormant growth at the same time as ND treatment but the growth was resumed as under LD plants i.e. about two months earlier than ND. Manilkara plants were induced to dormant condition both under SD and LD treatments and the period corresponded exactly with small growth rates under ND conditions.
It is concluded that these two species are by and large indifferent to LD and SD conditions and that the annual growth-cycle in nature is more under the changing influence of total sum of weather conditions rather than entirely on day lengths.
Full Text
- Ophioglossum Polyphyllum A. Br.-a New Record for Eastern Himalaya
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: 159-160Abstract
No Abstract.Full Text
- The Genus Hovenia Thunb. (Rhamnaceae) in the Indian Subcontinent
Authors
1 Botanical Survey of India, Howrah, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 26, No 1-2 (1984), Pagination: 52-56Abstract
The Himalayan Hovenia described by Lindley in 1820 as H. acerba was subsequently merged by him with H. dulcis Thunb., a species occurring in Japan and China. Y. Kimura in 1939 in his revision of Hovenia retained H. acerba distinct from H. dulcis. The authors have studied the literature and material on Hovenia in Central National Herbarium and conclude that H. acerba should be treated as a variety under H. dulcis, H. dulcis var. acerba, comb, et stat. nov. H. parviflora Nakai et Kimura from South China is reduced as synonym of H. dulcis var. acerba. H. dulcis properly named as H. dulcis var. glabra Makino is treated as a taxonomic, if not nomenclatural synonym, of H. dulcis var. dulcis, and is reported from the Indian sub-continent from the Garhwal Himalayas and Arunachal Pradesh.Full Text
- Seed Morphological Studies in the Indian Isubgol of Commerce
Authors
1 Botanical Surrey of India, Howrah, IN
2 Botanical Survey of India, Howrah, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 27, No 1-4 (1985), Pagination: 63-68Abstract
Plantago ovata L. (Plantaginaceae) is known as 'Isubgol' and the seeds are used in medicine. Seeds of P. amplexicaule, P. lanceolata, P. afra and P. asiatica are also used as substitutes or mixed with the seeds of P. ovata. Seeds of Salvia aegyptiaca (Labiatae) are also found to be mixed with isubgol. To identify and distinguish them from each other, the seeds of all Indian species of Plantago along with those of Salvia aegyptaca have been studied. Correct names, local names, description, distribution in India and their uses along with a key to the species are provided in this work.Full Text
- A Review of the Androecium in Sterculiaceae with a Key to the Genera
Authors
1 Botanical Survey of India, Howrah, IN
Source
Nelumbo - The Bulletin of the Botanical Survey of India, Vol 22, No 1-4 (1980), Pagination: 213-216Abstract
No Abstract.Full Text