Abstract:
Lecanopteris comprises 13 epiphytic species with expanded rhizomes which shelter ants in a mutualistic association. Taxonomic descriptions and a key are given. In subgenus Myrmecopteris, L. sinuosa occurs    throughout Malesia, in most habitats below 800m a.s.I., especially in the ant-epiphyte communities of dry  forest. Lecanopteris crustacea is confined to Bomean. Sumatran and Malaysian lowland dipterocarp canopies.  Its sister species, L. sarcopus occurs in intact and disturbed forest from 400-1200m in the Philippines and Sulawesi. Lecanopteris mirabilis is found in New Guinea, Ambon and Seram, and is locally abundant in undisturbed mid-montane forest. Subgenus Lecanopteris consists of three groups. typified by L. curtisii, L. pumila and L. darnaedii. Lecanopteris curtisii forms distinct races in New Guinea, the Philippines, Sumatra, Java and Borneo. It is a rare member of intact or old disturbed hill forest between 400m and 1200m. The L. pumila group contains three endemics of lower montane forest in Sulawesi: L. celebica, L. casnosa and L. balgooyi, and a Philippine endemic, L. luzonensis, Lecanopteris pumila is found in mid-montane forest and ridgetops in Malaysia, Sumatra and Borneo, where it forms distinct races. The L. darnaedii group is endemic to Sulawesi; the three species are allopactric and found in undisturbed mid-montane forest. Myrmeco-epiphytic communities, inhabited by Iridomyrmex cordatus, are found in Bornean heath forest and New Guinean savannah. The ants contribute to the spread of ant-epiphytes by planting their propagules in the ant carton surrounding L. sinuosa. The only ecological characteristic common to Lecanopteris apart from myrmecophytism is heliophily, confining individuals to habitats with open canopies or tree crowns.  No preference is manifested for host species, but Lecanopteris tends to grow on rough-barked trees.

Abstract:
Five species are described as new and illustrated. Two have a thin exospore and two have not. The fifth species, P. flavidifolia, is apparently rare and needs fuller investigation. Sporograph-analysis reveals the smooth spore, general in Psathyrella, as an endospore.

Abstract:
Fifteen taxa of Bolbitiaceae, belonging to the three main genera and sections thereof, are described from Malaysia including four new taxa viz.  Agrocybe malesiana, Bolbittius malesianus, Conocybe mitrispora & C. huijsmanii var. conica.  Some interesting records from the Solomon Islands are also included.

Book Review

Abstract:
The native and naturalized vascular plant species of the Republic of Singapore are enumerated with important synonyms used in twentieth century botanical works. Particular emphasis is placed on Ridley's  Flora of Singapore. published in 1990. Appendices provide indexes to this flora and to the unpublished Flora of Syonan, a list compiled by staff of the Singapore Botanic Gardens at the time of the Japanese occupation of Singapore. One new combination in the Commelinaceae is introduced.

Book Review

Book Review

Abstract:
No abstract

Abstract:
No abstract

Abstract:
Five new species of Didymocarpus are described from Peninsular Malaysia. Two, D. anthonyi Kiew and D. leiophyllus Kiew, are from the east coast and belong to sect. Boeopsis; D. leucanthus Kiew is from the foothills of Selangor; D. stoloniferus Kiew from Gunung Ulu Kali, Pahang; and D. salicinoides Kiew, from Trengganu and southern Kelantan, is raised to specific rank having previously been described as D. salicinus var. major Ridley. The sections Boeopsis and Salicini are defined and keys to their species provided. Didymocarpus lithophilus Kiew is validated.

Abstract:
The development of the fruit-bodies was observed under natural conditions in the forest. Those of A. elata, A. princeps and A. virginea took 12-14 days to reach maturity when they persisted for merely 1-3 days. Expanded fruit-bodies soon became fly-blown and this hastened their decay. A. elata and A. princeps fructify early in the fungus season, as do most Malayan species, but A. virginea appears towards the end of the season. The presence of these species is revealed only for a few days twice each year.

Abstract:
Pteris holttumii C. Chr. was found in the vicinity of the lowland dipterocarp forest of Dent Peninsula, of Lahad Datu. It is the second record for Malaysia, and the only known record from the lowland for the species.

Abstract:
An intense botanical survey of Pulau Ubin, a 1019, 2 ha island within the Republic of Singapore, found at least 332 native and naturalized vascular plant species. These are listed in the paper together with 40 species found to have escaped from cultivation. Previous botanical records for Pulau Ubin are also collated. The contemporary flora is dominated by early successional and ruderal species in addition to mangrove and beach forest elements. The low diversity and relatively high frequency of aliens (71 out of 332 spp.; 21 per cent of the flora) reflects the high degree of human disturbance on the island.

Abstract:
A total of 230 taxa of diatoms belonging to 58 genera were recorded from 12 locations in Peninsular Malaysia and 14 locations in Singapore. The most common genera are Navicula and Nitzschia.

Abstract:
From field and hebarium studies, two new fern and 23 angiosperm taxa were found to have been previously overlooked or newly discovered in Singapore. Brief notes on their description, distribution and collecting localities are made for each.

Abstract:
Karyomorphology of five species in three genera of Myrtaceae, namely Callistemon, Melaleuca, and Syzygium, is investigated. All five species examined have similar chromosome features at mitotic interphase, prophase, and metaphase. Mitotic metaphase of their somatic cells consistently show 2n = 22, of which 18 chromosomes have centromeres at median position and four at subterminal or terminal position. Syzygium aromaticum has a secondary constriction in the longest pair of chromosomes as in several other related and unrelated species of the family, a fact suggesting that the presence of the secondary constriction may be of some taxonomic use.

Abstract:
The bamboo Schizostachyum terminale Holtt., first recorded and for more than 30 years known only from Peninsular Malaysia, has been documented for north Borneo. It has a clambering, thicket-forming growth habit and an unusual preference for seasonally inundated swampy riverbanks and alluvial flats.

Abstract:
Hymenandra A.DC, with eight species, is revised. Four new species are proposed and one species originally placed in Ardisia is transferred.  The genus is subdivided into two subgenera, Hymenandra and Lacrimopila subg. nov. (the first with 6, the second with 2 species). A key to the species, new descriptions, illustrations, and a list of exsiccatae examined are included.

Abstract:
The following marine algae are newly recorded for Singapore mangroves: Bostrychia pinnata Tanaka et Chihara, Bostrychia simpliciuscula Harvey ex J. Agardh (Rhodophyta, Ceramiales, Rhodomelaceae), Caloglossa angustalata nom. prov. (Rhodophyta, Ceramiales, Delesseriaceae) and Boodleopsis carolinensis Trono (Chlorophyta, Caulerpales).

Abstract:
Two new species, Cinnamomum pubescens and Endiandra scrobiculata, and two new varieties, Actinodaphne sesquipedalis var. glabra and Lindera concinna var. reticulata are described.

Abstract:
This paper reports the findings of an experiment on embryo culture of Howea belmoreana and Howea forsteriana.  It was demonstrasted that growth regulators significantly affect the development of embryo  culture. The medium containing 1 mgl-1 of 2,4-D and 0.5 mgl -1 of 2iP was found to give the best results for both of the Howea palms. Conventional germination of Howea palm seeds generally takes a year or more (Reynolds 1982).  In our experiments, the embryo culture required only 12 -  20 weeks to develop fully rooted plantlets. This saving in time could be significant for commercial production.