Abstract:
No abstract

Abstract:
Boletus tristis Pat. et Baker is a synonym of B. longipes Mass. and is based on young specimens. The taxononiic position of B. longipes is problematic but it is retained in Boletus subgen. Tylopilus Karst. Austroboletus (Corner) Wolfe is not considered a satisfactory genus.

Abstract:
No abstract

Obituary

Abstract:
Laplacea Kunth and Gordonia Ellis, generally treated as two separate genera, are not distinct and therefore do not merit full generic status.

Abstract:
In a recent revision the tribe Dissochaeteae (Naud.) Triana has been found to include 54 species and 32 varieties which are in the following genera: Diplectria (Bl.) Reichb., Dissochaeta Bl., Macrolenes Naud., Creochiton Bl., and Pseudodissochaeta Nayar.* The first four genera are woody climbers, while the last genus has species which are mostly shrubs or trees up to 5 m tall. The entire tribe ranges from Assam, throughout SE Asia, Hainan, throughout the Malay Archipelago and the Philippines, to New Britain.

Book Review

Abstract:
No abstract

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