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INDONESIA
REINWARDTIA
Published by Lembaga Ilmu Pengetahuan Indonesia
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Articles 1,467 Documents
 64   65   66   67   68 
PREDICTING HABITAT DISTRIBUTION OF ENDEMIC AND CRITICALLY ENDANGERED DIPTEROCARPUS LITTORALIS IN NUSAKAMBANGAN, INDONESIA Iyan Robiansyah
REINWARDTIA Vol 16, No 1 (2017): Vol.16 No.1
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v16i1.2785

Abstract

ROBIANSYAH, I. 2017. Predicting habitat distribution of endemic and critically endangered Dipterocarpus littoralis in Nusakambangan, Indonesia. Reinwardtia 16(1): 11 - 18. - The tree species Dipterocarpus littoralis (Bl.) Kurz. is endemic to Nusakambangan and categorized as critically endangered. In the present study, the habitat suitability of the species in Nusakambangan was predicted using logistic regression analysis and Maxent model. Three topographic variables (elevation, slope, and aspect), distance from river and coastline, and one vegetation index (Normalized Difference Vegetation Index (NDVI)) as well as two water content indexes (Normalized Difference Water Index (NDWI) and Normalized Difference Moisture Index (NDMI)) were used as predictors of the models. Employing initial number of 82 presence and 250 absence data of D. littoralis, both models were able to predict the suitable areas for the species with fairly high success rate. The AUC and Kappa value for logistic regression were 0.77 ± 0.027 and 0.34 ± 0.058, respectively, while the respected values for Maxent were 0.91 ± 0.062 and 0.37 ± 0.025. Logistic regression analysis identified a total area of 26.13 km2 to be suitable for D. littoralis, while a smaller suitable area (7.85 km2) was predicted by Maxent model. Coastal areas in the west part of the island were predicted by both models as areas with high suitability for D. littoralis. Furthermore, distance from coastline and river, elevation, NDVI, NDWI and NDMI were suggested to be very important for the species ecology and distribution. The results of this study may serve as a basis for population reinforcement and reintroduction programs of D. littoralis and guide for ecosystem management of Nusakambangan Island as a whole. 
AEGOPOGON (GRAMINEAE) IN MALESIA J. F. Veldkamp
REINWARDTIA Vol 10, No 2 (1984): vol. 10 No.2
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v10i2.263

Abstract

AeyopoyoiL ceucliroides Willd. var. cenchroides is recorded for the first time from Malesian area based on a collection from Mt. Michael (Papuu New Guinea). A description is provided.
LES ECOSYSTEMES DOMESTIQUES PAR L'HOMME DANS L'ANCIEN ROYAUME INSANA - TIMOR EKO BAROTO WALUJO
REINWARDTIA Vol 11, No 5 (2000): Vol. 11 No. 5
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v11i5.938

Abstract

Based on ethnobotanical data, agricultural practice and floristic analysis (simple and transect analysis), the author tries to evaluate human impact on vegetation cover. He attempts also to show that originally this environment consisted of two different types i.e. dry and humid, each of which corresponded to a certain floristic composition. There is a tendency for this difference in composition to decrease there where human interference is strongest,i.e. on land under cultivation. It is difficult to verify that there is any part of Insana that is not influenced directly or indirectly by human intervention. It is evident that the practice of slash and burn has had the strongest influence on the transformation of the vegetation cover.However, we have to consider also that the introduction of Bah cattle to this territory has had a great impact on the modification of the environment. Meanwhile there is a tendency to increase the number of species or varieties of economic plants, in particular food plants.
REVISION OF DISSOCHAETA (MELASTOMATACEAE) IN JAVA, INDONESIA ABDULROKHMAN KARTONEGORO; JAN FRITS VELDKAMP
REINWARDTIA Vol 13, No 2 (2010): Vol. 13 No. 2
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v13i2.2133

Abstract

KARTONEGORO, A. & VELDKAMP, J.F. 2010. A revision of Dissochaeta (Melastomataceae) in Java. Reinwardtia  13(2): 125-145. - There are 12 species of Dissochaeta (Melastomataceae) in Java, Indonesia: D. bakhuizenii, D. bracteata, D. decipiens, D. fallax, D. gracilis, D. inappendiculata, D. intermedia, D. leprosa, D. monticola, D. reticulata, D. sagittata and D. vacillans. Diplectria and Macrolenes are regarded as separate genera and species traditionally classified within the latter have not been included. Dissochaeta leprosa, D. reticulata, and D. sagittata are reinstated as species. Dissochaeta gracilis is the most common species of Dissochaeta and D. bracteata is the rarest one. There are no endemics for the island. Each taxon is provided with literature references, synonymy, morphological descriptions, distribution, ecological habitat, collector's notes, and notes. An identification key and a list of collections seen are included.
PRELIMINARY REVISIONS OF SOME GENERA OF MALAYSIAN PAPILIONACEAE IV - A REVISION OF ORMOSIA m. s. knaap; van meeuwen
REINWARDTIA Vol 6, No 3 (1962): vol.6 no. 3
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v6i3.221

Abstract

In this revision 11 species have been admitted for the Malaysian Archipelago, including 0. stipidacea which is described as new, from Brunei. A key, synonymy, and distribution are given. Ten species and one variety are reduced; three of these reductions (under O. macrodisea) are tentative, as of two of them no types were available. Another species, 0. villamilii Merr., is reduced to Pericopsis moonii. O. scandens, of which I ' have also seen no material, I have not been able to place; its pod is unknown.
The dynamics of Pandanus illustrations from a historical perspective Vera Budi Lestari Sihotang
REINWARDTIA Vol 13, No 5 (2013): Vol. 13, No. 5
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v13i5.429

Abstract

Pandanaceae is placed in the superorder Pandaniflorae and the order Pandanales, indicating its uniqueness when compared with the other seed plants. Pandanaceae contains three genera, Pandanus, Sararanga and Freycinetia. Limited collections seem to be one reason why botanical illustrations are made, so that people can enjoy their "collections" from a picture painted on canvas. Botanical illustration is one type of record that can also give evidence about whether the plant exists. In addition, botanical illustration can give information about the growth of the plant, and historical evidence can be traced. There is no doubt that Pandanus has also been well illustrated. Later, further developments in Pandanus research obviously influenced the illustrations of Pandanus.
THE GENERIC NAMES PROPOSED FOR HYMENOMYCETES-VI*Brachybasidiaceae, Cryptobasidiaceae, Exobasidiaceae M. A. DONK
REINWARDTIA Vol 4, No 1 (1956): vol.4 no.1
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v4i1.999

Abstract

1. In this continuation of the author's nomenclatorial enumeration not only the three families mentioned in the subtitle are taken into consideration: about ten generic names of fungi which at one time or another have been attributed to the Exobasidiaceae and which are now excluded from the Hymenomycetes, are also dealt with.2. The name' Cryptobasidiaceae is validly published.
FLORA OF SINGAPORE PRECURSORS, 8. SYSTEMATY OF THE NEW SOUTHEAST ASIAN GENERA CANTHIUMERA AND DIBRIDSONIA (RUBIACEAE: VANGUERIEAE), WITH NOTES ON PLANT ARCHITECTURE AND REPRODUCTIVE ECOLOGY Wong Khoon Meng; Ridha Mahyuni; Xin Yi Ng; Louise Neo
REINWARDTIA Vol 17, No 2 (2018): Vol.17 No.2
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v17i2.3648

Abstract

WONG, K. M., MAHYUNI, R., NG, X. Y. & NEO, L. 2018. Flora of Singapore Precursors, 8. Systematy of the new Southeast Asian genera Canthiumera and Dibridsonia (Rubiaceae: Vanguerieae), with notes on plant architecture and reproductive ecology. Reinwardtia 17(2): 101–124. — The recognition of a number of distinct genera by morphological and molecular phylogenetic attributes from the Canthium s.l. complex still leaves a core group of morphologically disparate taxa. The distinguishing features of the spiny Canthium s.s. and two groups of non-spinescent Southeast Asian tree taxa still commonly identified with C. glabrum Blume and C. confertum Korth. are assessed against those of Cyclophyllum Hook.f., Bullockia (Bridson) Razafim., Lantz & B.Bremer, Kanapia Arriola & Alejandro, Keetia E.Phillips, Perakanthus Robyns ex Ridl., Psydrax Gaertn., and Pyrostria Comm. ex Juss., similarly arborescent genera that have been so distinguished through recent studies. Canthium glabrum and C. confer-tum are, respectively, the bases of the genera Canthiumera K.M.Wong & Mahyuni and Dibridsonia K.M.Wong newly described here. The new species Canthiumera robusta K.M.Wong & X.Y.Ng is described; new nomenclatural combi-nations include C. glabra (Blume) K.M.Wong & Mahyuni, C. neilgherrensis (Wight) K.M.Wong, C. neilgherrensis var. chartacea (Gamble) K.M.Wong, C. siamensis (K.Schum.) K.M.Wong, Dibridsonia conferta (Korth.) K.M.Wong, D. culionensis (Elm.) K.M.Wong, and D. oblongifolia (Quisumb. & Merr.) K.M.Wong. Canthium glabrum var. pedun-culatum Pitard, Plectronia neilgherrensis var. chartacea Gamble and Canthium confertum Korth. are lectotypified. Plectronia viridis Merr. and P. leytensis Merr. are reduced to synonymy under Dibridsonia conferta. Notes on the tree architecture, dispersal ecology and germination of Canthiumera and Dibridsonia are provided.
THE GESNERIACEAE OF SULAWESI VI: THE SPECIES FROM MEKONGGA MTS. WITH A NEW SPECIES OF CYRTANDRA DESCRIBED Abdulrokhman Kartonegoro; Daniel Potter
REINWARDTIA Vol 14, No 1 (2014): Vol. 14 No. 1
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v14i1.389

Abstract

Field exploration of the flora of the Mekongga Mountainous area of Southeast Sulawesi was conducted from 2009 to 2011. Herbarium specimens collected during this exploration and additional collections from Herbarium Bogoriense (BO) included 21 species in nine genera of the family Gesneriaceae. These comprise one species of Aeschynanthus, four species of Agalmyla, one species of Codonoboea, seven species of Cyrtandra, one species of Epithema, three species of Monophyllaea, two species of Rhynchoglossum, one species of Rhynchotechum and one species of Stauranthera. Twelve of these species are consider-ed endemic to Sulawesi while the rest are known to occur on neighbouring islands or are more widely distributed. Monophyllaea merrilliana, previously known only from the Philippine Islands and Borneo, is newly recorded for Sulawesi. A new species of Cyrtandra collected in the Mekongga area, C. widjajae, which resembles C. gorontaloensis from North Sulawesi but differs in having shorter pedicels and curved rather than straight fruits, is described.
A NEW SPECIES OF HYPOESTES FROM THE ANDAMAN ISLANDS K. THOTHATHRI
REINWARDTIA Vol 7, No 1 (1965): vol.7 no.1
Publisher : Research Center for Biology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/reinwardtia.v7i1.964

Abstract

Affinis H. purpureae (L.) Soland. ex Roem. & Schult. a qua tamen differt inflorescentia, forma bractearum involucri atque magnitudine capsularum.

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