K. C. Sahni , H. B. Naithani

Abstract

Acer pinnatinervium Merrill, a poorly known species, so far known from Upper Burma is now being reported for the first time from India (Arunachal Pradesh). The wood of it may be used for making poles.

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K. C. Sahni , H. B. Naithani

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A species of Lithocarpus new to science Lithocarpus kamengii Sahni & Naithani from Kameng District, Arunachal Pradesh, India, is described. This species is allied to Lithocargus milroyi (Purkayastha) Barnett but differs in having large leaves. 30-33 X 11-13 cm, Lateral nerves 18-pairs, cupule aggregated but 2.6 X 3 cm. This taxon is named after Kameng District from where it was recently collected.

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K. C. Sahni , R. B. Naithani

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Hypericum griffithii Hook. f. et Thoms ex Dyer, a very rare shrub is recorded for the first time from Arunachal Pradesh after a lapse of seventytwo years. It was first collected by Girffith in the year 1961-62 from Bhutan and again by G.L. Searight from Chumbi Valley, Tibet in 1905. To save this rare endemic plant from extinction its removal from the wild should be banned and its name incorporated in the list of endangered flora.

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K. C. Sahni , H. B. Naithani

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Rhododendron dalhowsiae Hook f. var. rhabdotum (Balf f&Cooper) Cullen, a very rare, spectacular and endemic shrub is recorded for the first time from Arunachal Pradesh. It was first collected in 1915 bY Cooper from Bhutan and again by Sberrif also from Bhutan in 1934 Balfour described Cooper's collection as R. rhabdatum Balf f et Cooper. Cullen and Ghamberlain have recently treated this species as a variety of R. dulhlhouiae Hook. F. and call it R dalhousiue var. rhabdotum (Balf. f. et Cooper) Cullen. This taxon is fucing the hazards of extincion in Arunchal and Bhutan owing to the massive road building and develop-mental activities there. To save this Rhododendron from extincnion it. removal from the wild should be hanned and its culture in recognized Government Botanical Gardens in the Eastern Himalaya is recommended.

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K. C. Sahni , H. B. Naithani

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A Rhododendron new to science, Rhododendron tawangensis Sahni & Naithani from Kameng District, Arunachal Pradesh, India is described. This species is allied to Rhododendron kendrickii Nutt., but differs in having papery bark,leaves smaller, 5-11 × 1.5-2.5 cm, glaucous papillate underneath, tip blunt, mucronate, bracts cuspidate, capsule glandular hairy. This taxon is named after the place of collection i.e. Tawang in Kameng District from where it was recently collected.

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K. C. Sahni , S. Chawala , S. S. R. Bennet

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A new combination, Albizia chinensis var. smithiana (Roxb.) Sahni, Chawla and Bennet, is proposed for A. stipulata var. smithiana (Roxb.) Praia, as the correet name. for A. stipulata Boiv. Is A. chinensis (Osbeck) Merr. From the original description of Roxburgh it is evident that the large stipuled plants should be called var. smithiana and not the small stipuled plants as Prain and later botaniots have done.

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S. S. R. Bennet , K. C. Sahni

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Two new combinations, Maylenus rothiana (Lawson) Bennet & Sahni and M. wallichii (G. Don). Bennet & Sahni, have been proposed here for the plants commonly known by the names Gymnosporia rothiana Lawson and G. wallichiana Lawson in India Floras. Also a new name, Maytenus kurzii Bennet & Sahni,is proposed for Moytenus thomsonii (Kurz) Raju & Babu because of the earlier name M. thompsonii Fosberg.

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S. S. R. Bennet , K. C. Sahni

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Seurrula ferruginea (Jack) Danser, hitherto reported from Burma, Yunnan, Malay Peninsula, Sumatra, Borneo, Palwan and W. Java, has been reported from Western Peninsula of India, an area far away from its known area of distribution. This is another instance of disjunct distribution of plants common to W. Ghats and areas adjacent to E. India.

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S. S. R. Bennet , K. C. Sahni

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The correct name and author citation for the Paninsular Indian plant commonly known by the name Holigarna grahamii Hook. f. is Holigarna grahamii (Wt.) Kurz.

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K. C. Sahni , H. B. Naithani

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A new species or Cyperus Linn., C. dwarkensis Sahni and Naithani from Gujarat is described. Allied to C. pannonicus. Differs in having 2 involucral bracts, stamens 1-2, style absent or very short, nut 1 × 0.5 mm. In C. pannonicus. involucral bracts are 3, styles long, and nut 2 mm in diameter.

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J. C. Varmar , K. C. Sahni

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In India 1300 species of orchids are known to occur and the N.E. Region accounts for 600 species. Much less attention has been paid to conservation of floral compared to the publicity given to fatuna like the vanishing rhinoceros and the threstaned tiger. Outstanding, rare and spectacular orchids are highlighted such as Vanda coerulea the blue orchid of Meghalaya which has vanished from the wild. Paphiopedilum fairieanum the ladies slipper orchid popularly called the 'lost orchid' which carried a prize of £1000 for its collection from tbe wild Diplomeris hirsuta the spectacular orchid of Darjeeling and Sikkim which inhabits big boulders and is threatened due to intense road building activity, Galeola falconeri the tallest orchid of the eastern region attaining 3 m in height and standhing out majestically in the forests of Kameng, Cymbidium grandiflorum, G. giganteum etc. and a host of handsome Dendrobiums some of which produce a mass effect of blooms. Cultural techniques and information on potting and compost is given. It is emphasized that there is an urgent need to have a botanical survey of Arunachal, Sikkim, Manipur, Nagaland etc., wtih an attempt to save spectacular flora like orchids, plants of great botanical interest or ancient flora of antiquity either in botanic reserves, sanctuaries or preservation plots. A chain of sanctuaries are desired to preserve the entire ecosystem. Rearing of threatened flora in botanic garden is suggested.

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K. C. Sahni , H. B. Naithani

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A new species of Derris Lour.; D. leanjilalli Sahni and Naithani from Uttar Pradesh (India) is described. Allied to D. manticola (Kurz) Prain. Differs in glabrous nature of petiole, rhachis and pedice1s; leaftets-9, ovate-oblong, notched at tip; calyx cup glarous entire or minutely toothed. The species is being named in honour of Late Sri P.C. Kanjilal, I.F.S. for his contributions of Forest Botany of Uttar Pradesh.

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K. C. Sahni

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K. C. Sahni , M. B. Raizada

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K. C. Sahni

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The Andamans and Nicobars have nearly 1136 Sq. Km. and 35 Sq. Km. (450 and 13.8 square miles) respectively of mangrove forests. They develop in areas covered by brackish water at high tide, such as the mud flats along tidal streams. These forests are of the gregarious type, i.e., they are largely composed of single species or a few allied ones. Some of these species also occur in Malaya and the Philippines where considerable work has been done on their utilization. With a view to the possibility of utilizing them for similar purposes, data have been collected from these countries. The principal products derived are firewoods, charcoal, tan barks, dye barks, and the various products of the Nipa palm including thatching material and alcohol. Tests confirm that they are excellent fuelwoods. Their distribution in the Andamans and Nicobars and their characteristics are described. A key to the genera of mangrove-swamp plants in these islands has been drawn up for rapid identification in the field. The difficulties of extraction and ways to overcome them by improved mechanical means are also described.

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M. B. Raizada , K. C. Sahni

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K. C. Sahni

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M. B. Raizada , K. C. Sahni

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K. C. Sahni

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The imporlance of tree introduction and the benefits arising from some of the outstanding introductions are emphasized. Methodology employed in plant introduction, viz., collection of climatic data, information regarding provenance, range of distribution, introductions from centres of origin, preliminary testing, quarantine measures, etc., are discussed. An inventory of successful introductions has been outlined.

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K. C. Sahni

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The vegetation of Kameng and Subansiri Districts of NEFA is described on the basis of specimens collected which are listed ,at the end. Geography, climate and affinities of the flora are discussed. New records, rare plants, edible species, etc., are enumerated.

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K. C. Sahni , K. R. Naresh Bahadur

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Rhus insignis Hook. f. (1876) is an illegitimate name being a later homonym of Rhus insignis (Del.) Oliv. (1868). The latter is an African plant. The former, an Indian plant, is now renamed as Rhus hookeri Sahni et Bahadur nom. nov. It is a rare and beautiful tree which is threatened with extinction.

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K. C. Sahni , R. Dayal

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Ormosia glauca Wall., a tall tree from Garo Hills, Assam is reported for the first time from this floristically rich province. This rare species was known earlier from Nepal and Sivok Hills in Darjeeling District. Its possible modes of migration south-eastwards and measures for conservation are discussed.

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K. C. Sahni , K. M. Vaid , H. B. Naithani

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A comprehensive account of the "Cyperaceae of Madhya Pradesh" published by Tiwari and Maheshwari lists 97 species. The present paper records six more species as additions to the earlier enumeration. These are-Cyperus cephalotes Vahl, C. melanospermus (Nees) V. Suringar, Eleocharis geniculata (L.) Roem.& Sch., Fimbristylis acuminata Vahl, F. eragrostis (Nees) Hance and Scleria rugosa R. Br.

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K. C. Sahni , S. S. R. Bennet

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Scleria psilorrhiza is reported from Himachal Pradesh. It is a stoloniferous sedge, having premorse leaves with the leaf sheaths conspicuously winged. Inflorescence is a terminal panicle. Nut is ovoid, 3.5-4 mm long, smooth, shining, hard, not beaked; disk triangular, reflexed, shallowly and obtusely 3-lobed.

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K. C. Sahni , S. S. R. Bennet

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A new species of Albizia Dura ., A. orissensis Sahni & Bennet from Orissa is described.

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K. C. Sahni , H. B. Naithani

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Solanum hovei Dunal (Solanaceae) a rare woody shrub endemic to North Western India has so far been known from its type collection from Dolca, sabermatty (Gujarat State) collected by A.P. Hove in the year 1819. Dunal 1852 described Hove's specimen as Solanum hovei Dunal. After 1852 this species has not been described in any Indian Flora viz., Clarke, 1883 and has not been reported from any where in India. This is now being reported for the first time during recent collections in Goa, during the coarse of our work on the preparation of Forest Flora of Goa. It is interesting and important to note that no authentic specimen of this taxon was available in Indian Herbaria till the confirmation of the present F.R.I. collection from British Museum, London. Its dispersal is attributed through migrant birds. Measures for conservation of this rare endemic are given.

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