Abstract:
The genera and species of Thelypteridaceae in Malaya are here arranged as in a monograph of the family prepared for Flora Malesiana, Series II (Pteridophyla) Vol. 1, part 5, which is in process of publication simultaneously with the present paper.  New names and new combinations will date from Flora Malesiana and not from the present paper, the object of which is to indicate the necessary corrections in Holttum, A Revised Flora of Malaya Vol.2 ( dated 1954 but published early in 1955, second edition 1968) to which  reference is made under every species. Apart from changes in generic concepts, the principal new information concerns the species named Thelypteris vicosa, Cyclosorus stipellatus and Cyclosorus ferox in 1955. New descriptions are only provided where those in the book are defective.

Abstract:
This revision of Memecylon of the Malay Peninsula includes twenty-eight species, three varieties, and threee imperfectly known taxa.  No new taxa are proposed here.  However, twenty-two taxa have been reduced to new synonyms, along with one new combination. Separate keys to flowering and fruiting material, critical taxonomic notes, detailed analyses oi various organs of taxonomic importance, and an index to collections are included. Simple line drawings of the floral parts and other salient features of each taxon have been prepared to supplement the descriptions.

Abstract:
The genus Cercospora and allied genera are represented by a great number of species which cause leaf spot disease on a wide range of host plants. They are responsible for much damage to economic plants such as cereals, grasses, vegetables, forest trees and ornamentals and are important plant pathogens. The diseased spots on the leaves vary in shape and size and are generally coloured pale brown to brown. Under humid conditions, abundant conidia are formed on the necrotic spots. Conidiophores appear as tufts or fascicles, arising from the lesion surface or through the stomata in the diseased areas. The perfect stage has not been encountered so far in the collections examined and described here. Since the genus Cercospora was established by Fresenius in 1863, numerous species have been recorded and described by mycologists and phytopathologists. The monograph by Chupp (1954) is a valuable reference source, and Deighton's many studies (1967, 1971, 1973) have added considerably to the elucidation of this interesting group of fungi. More recently, Deighton (1976) has redescribed a number of Cercospora-like species and estimated that some 2000 species names have been published to date in the genus Cercospora, which is a heterogenous genus and one of the largest of the Hyphomycetes. The number of species described here totalled 98, of which 72 species have been described and published previously by the authors as new Cercospora species. This publication brings together their reports published in various journals, which are now translated from French into English here. The recent studies by Deighton (1976) make it necessary for certain revisions and changes to the generic names of some species previously published as Cercospora species. This communication updates the authors' previous reports and faclitates access to information on the prevalent leaf spot diseases affecting host plants in this region caused by this group of fungal pathogens.

Abstract:
The Dipterocarpaceae are a medium-sized family of approximately 15 genera and 580 species (Airy-Shaw, 1973).  They are distributed over a large area of tropical Africa and the Indo-Malayan region from India, Ceylon, Indo-China, S. W. China to Malesia.  In Malesia, according to Symington (1943) there are 14 genera and 168 species in the Malay Peninsula, 13 genera and 276 species in Borneo, 11 genera and 52 species in the Philippines, and 3 genera and 5 species in New Guinea.  The distribution of this family is interesting because it links the flora of tropical Asia with that of tropical Africa where 2 genera Monotes and Marquesia are present.  Croizat (1952, p. 423) suggested that the dipterocarps are most certainly of Gondwanic origin, and they evolved and migrated from the continental mass that once occupied part of the Indian Ocean 100-500 million years ago. They later broke up into 2 major taxa, the Dipterocarpoidae, mostly confined to the continental Asia and Malesia, and the Monotoideae, restricted to Africa. They ocur in area which have had a relatively stable geology since the Cretaceous, probably the time of their origin (Meijer, 1974). This family is especially noted for its many valuable timbers such as Meranti (Shorea), Keruing (Dipterocarp) from Malaya, Serayas and Lauans (Shorea and Parashorea) from Borneo and Philippines. The existing schemes of classification of the Dipterocarpaceae are largely based on the gross morphology. It is hoped that the comparative studies of the stamens of various genera of Dipterocarps, together with the information gathered from wood, pollens, cytology, embryogeny, phytochemistry and others, might eventually contribute towards a natural classification of the family. This is an excerpt of the senior author's Honours' dissertation entitled "Comparative studies on the stamens and pollen grains of the Dipterocarpaceae", Department of Botany, University of Singapore, 1977-78. She wishes to thank Professor A.N. Rao of the Department for providing all the facilities, and to thank the Directors and curators of the Herbarium of the Botanic Gardens, Singapore, the Forest Research Institute, Kepong, Malaya and the Forest Department, Kuching, Sarawak, for having kindly supplied flowering materials for this study. Her thanks are also due to Mr. D. Teow for making photographs, and to Mr. J. Wee for advice on microtechniques.

Abstract:
A total of 126 species of mosses from 51 genera and 21 families, recorded from Singapore, are contained in this check list.  Fleischer (1900 - 1922), in his four volumes on the moss flora of Bogor, Indonesia, listed a number of species collected from Singapore.  Further records of local mosses are contained in Dixon's (1926) list of mosses from the Malay Peninsula, collected mainly by H. N. Ridley, I. H. Burkill, R. E. Holttum, and others from the Singapore Botanic Gardens. A list of the mosses collected from the Botanic Gardens itself was compiled by Holttum (1926).  Further work was not seen until Johnson (1964) published her account on the Malaysian Leucobryaceae and much later, the Fissidentaceae (Johnson, 1973). Dixon's (1926) list is by far the most comprehensive, but it is very much outdated. The present paper is an attempt at updating the list of mosses recorded from Singapore. Most of the species are from the above mentioned papers.  Those marked with an asterisk (*) are from the records of the Bryophyte Herbarium maintained by the Department of Botany, University of Singapore, as well as collections made by myself during the last two years. A total of 126 species from 51 genera and 21 families are included. The nomenclature and authorities cited are in accordance with Wijk et al. (1959 - 1969). The most appropriate name is given for each species, while any other name under which it has been reported is added in parenthesis.

Abstract:
No abstract

Abstract:
Ilex tahanensis Kiew nom. Nov. replaces I. rupicola Ridley — a nomen nudum; I. polyphylla Ridley and I. triflora var longifolia Ridley are reduced to I. triflora; and I. venulosa var nervulosa Loes. is I. Macrophylla Hook. F.

Abstract:
No abstract

Abstract:
No abstract

Abstract:
Aromadendron Blume, Manglietia Blume and Talauma Juss. are reunited with Magnolia Linn. As advocated by H. Baillon.  Species of the first three genera from the Malay Peninsula and Thailand are renamed.

Abstract:
Monopodial Orchids seem to differ from sympodial orchids in their response to tissue culture. We chose both monopodial orchids and sympodial orchids as materials to study their proliferation ability by leaf tissue culture.  Originally leaves of aseptic mericlone plantlets of Aranda Noorah Alsagoff (monopodial), Cattleya bowringiana x C. forbesii (sympodial) and Den. Alice Spalding (sympodial) were used. Subsequently, leaves of mature nursery plants of Aranda Wendy Scott, Aranda Christine No 27, No. 130, Asocenda Hilo Rose x Vanda Josephine (monopodial) and Den. Sunny (sympodial) were experimented with. Numerous plantlets from all, except the Dendrobiums, were successfully obtained by leaf tissue culture.

Abstract:
The genera Medinilla, Pachycentria, and Pogonanthera have been thoroughly revised for the Malay Peninsula. Fourteen species and 3 varieties of Medinilla, including Medinilla selangorensis Maxw., which is proposed as a new species, with 12 new synonyms, and 3 new combinations; 3 species of Pachycentria, with 1 new combination; and Pogonanthera pulverulenta (Jack) Bl. are included. In addition to the taxonomic treatment (with keys and critical notes), the comparative morphologies of various salient organs, distribution patterns, and an index to collections are presented. Drawings of the calyx, petals, stamens, and other important structures have been prepared for all taxa.

Abstract:
Tissue culture today plays an important role in the production of orchid clones throughout the world.  This technique applied to orchid plants by Morel (1960) is still being perfected by other research workers. Research workers have used a wide range of media for their cultures but the perfect medium for each stage  of orchid culture has still to be found.  This work is done to determine the beneficial or detrimental effects of sucrose in the culture medium.

Abstract:
Renanopsis Lena Rowold (Renanthera storiei X Vandopsis lissochiloides) first raised in Hawaii by Oscar M. Kirch in 1948, is found growing at the Singapore Botanic Gardens. It is a monopodial type orchid with a thick woody stem. The plant produces large attractive inflorescences having dark red flowers with light orange markings. The inflorescences, often branched are about 100-135 cm long and each bears about 45-70 flowers. Unfortunately, most of R. Lena Rowold plants do not produce sufficient roots along the stem and thus vegetative propagation by the normal method of cuttings is not possible. Monopodial orchids usually produce aerial roots along the stem and this is an important feature for vegetative propagation as cuttings made for propagation must have roots. The aim of the experiment conducted at the Singapore Botanic Gardens recently was to promote the growth of shoots and roots by the application of growth substances on top cuttings, base cuttings and whole plants.

Abstract:
The Trentepohliaceae are a family of aerial algae, abundant in the tropics but also found in temperate regions. They grow on rocks, soil, the bark of trees or as apiphytes or parasites of leaves.  The vegetative cells may appear green if the plant is growing in the shade but they are normally brick-red in colour due to a pigment, formerly known as "haematochrome," which is a mixture of x and B carotenes (Tischcr, 1936; Czyan & Kalb, 1960) dissolved in oil droplets in the cell. Pyrenoids are absent and starch is not formed, the product of photosynthesis being apparently a polyhydric alcohol, erythritol, (Bourne, 1958) which may accur in Trentepohlia in up to 1.4% concentration (Tischer. 1936). As in other terrestrial algae, large vacuoles containing water are absent.

Abstract:
No abstract

Abstract:
No abstract

Abstract:
No abstract

Abstract:
A new species of Bauhinia from Borneo is described; De Wit was the first to draw attention to this taxon which he called: "Phanera spec. nov. A" on the basis of sterile material. Flowering material is now available; we propose the name B. dewitii for this species belonging to the section Bracteolanthus (de Wit) Wunderlin.

Abstract:
Species delimitation in Dipterocarpaceae is discussed. The genus Pentacme DC, is reduced as a section of Shorea Roxb. The following names are reduced : Dipterocarpus penangianus Foxw. (to D. caudatus Foxw.), D. speciosus Brandis (D. kunstleri King), D. trinervis Bl. (D. retusus Bl.), D. pseudofagineus Foxw. (D. fagineus Vesque), D. basilanicus Foxw. (D. eurynchus Miq.), D. subalpinus Foxw. (D. hasseltii Bl); Anisopters mindanensis Foxw. and A. oblongata Dyer (A. costata Korth.) A. brunnea Fowx., A. polyandra Bl., and A. kostermansiana Dilmy (all to A. thurifera (Blco) Bl.), Vatica blancoana Foxw. (V. umbonata (Hook f.) Burck), V. simalurensis Sloot. (V. venulosa Bl.), V. subcordata Bl., V. celebica Bl. and V. papuana Dyer (all to V. rassak (Korth.) Bl, V. stipulata Ridl. (V. hullettii (Ridl.) comb. nov.), V. sumatrana (Miq.) Burck and V. wallichii Dyer (V. pauciftora (Korth.) Bl.), V. scaphifolia Kosterm. (V. javanica Sloot.), V. obtusifolia Elm. (V. mangachapoi (Blco) BI.), V. songa Sloot. (V. perakensis King); Hopea argentea Meijer (H. cernua T.et B.) H. kelantaneusis Sym. and H. garangbuaya Ashton (H. coriacea Burck.) H. woodiana Gutierrez (H. malibato Foxw.), H siamensis Heim, (H. pedicellata Brandis), H. dolosa Sloot. (H. celebica Brandis), H. nabirensis Sloot. (H. iriana Sloot.), H. resinosa Sym. (H. pachycarpa (Heim) Sym.), Shorea flava Meijer (S. falciferoides Dyer), S. glaucescens Meijer (S. falciferoides Foxw.), S. ciliata Foxw. (non King) (S. astylosa Foxw.), S. rogersiana Raizda and Smitinand (S. laevis Ridl.), Pentacme mendanensis Foxw. (S. contorta Vidal). S. resinanegra Foxw. (S. longisperma Roxb.), S. kalunti Merr. (S. hopeifolia (Heim) Sym.), S. sororia Sloot. (S. assamica Dyer), S. plagata Foxw. and S. agsaboensis Stern (S. pauciflora King). Parashorea stellata Kurz and P. lucida (Miq.) Kurz are reinstated as separate species. Balanocarpus heimii Sym. is transferred to a new taxon Neobalanocarpus gen. nov. The identity of Parashorea warburgii Brandis, Hopea dasyrrhachis Sloot., H. gregaria Sloot. and H. plagata Vidal, S. siamensis Miq. and S. virescens Parijs is discussed. There are 3 species of Dipterocarpus, 5 of Vatica, 8 of Hopea and 6 of Shorea described for the first time; subspecies are defined in Dipterocarpus caudatus Foxw., D. palembanicus Sloot., Anisoptera thurifera (Blco) Bl., Vatica venulosa Bl., V. granulata Sloot., V. javanica Sloot., V. mangachapoi (Blco) Bl., Dryobalanops oblongifolia Dyer, Shorea falciferoides Foxw., S. parvistipulata Heim. S. singkawang Miq. and S. curtisii Dyer.

Abstract:
A new variety Cnesmone javanica Bl. Var. glabriuscula Balakr. & N. G. Nair (EUPHORBIACEAE) is described with illustrations, from South Andaman Island of Bay of Bengal in India.

Abstract:
Only 12 Macaranga are known from 'Greater India', these are keyed out and annotated. Several remain very inadequately collected.  M. gmelinifolia is reduced to M. pustulata and confusion between M. indica and M. peltata is resolved.

Abstract:
A new species Macaranga nicobarica (Euphorbiaceae) is described with illustrations from Nicobar group of islands in the Bay of Bengal.

Abstract:
Plantlets were produced from white and firm callus tissue of Paulownia taiwaniana Hu & Chang initiated on a modified Murashige and Skoog medium. Illuminated by 400 ft.-c of light for 16 hrs/day at 25°C., leafy shoots were initiated followed by roots at a later stage. Whole plantlets were then isolated from callus. Plantlets after transplanting into the soil survived.

Abstract:
Nomenclatural notes are given for 4 species from Java: Saurauia bracteosa DC., S. javanica (Nees) Hoogl. (Reinwardtia javanica Nees; syn.: S. reinwardtiana Bl.), S. lanceolata DC. (syn.: S. micrantha Bl.), and S. microphylla Vriese (syn.: S. blumiana Benn. non S. blumeana Spreng.). S. bogoriensis Hoogl. is described as a new species Java.

Abstract:
Two new species of Saurauia are described from the island of Flores in the Lesser Sunda Islands: S. schmutzii Hoogl. and S. verheijenii Hoogl.

Abstract:
No abstract

Abstract:
No Abstract