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BLUMEA BLUMEA[Top of this page] [Catalogue of publications] [NHN]
Summary - In 1965 the late Mr. J. Daams, an ardent and acute fungus collector, discovered in a greenhouse at 's Graveland, the Netherlands, a baffling small agaric with a very dark red-brown pileus, dark brown (sub)decurrent lamellae, a whitish veil partly covering pileus and stipe and a bitter to even acrid taste. The microscopic characters soon revealed that a rather aberrant species of Galerina was involved. In later years this species has been repeatedly found in greenhouses, but also outdoors in orchards, in the same region, always on compost or blackish soil, but after 1971 it has not been recorded again. A recent scanning of the literature on Galerina has shown that none of the nearly 300 species of this genus recognized in the world combines the characters of the present fungus.
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Summary - The knowledge of the macrofungi (mushrooms and toadstools) in Europe, including the Netherlands, is still far from complete. During our studies on this group of organisms in the Netherlands and adjacent Belgium and Germany while preparing a critical identification work, the Flora agaricina neerlandica, a fairly large number of new species has been discovered, and a lot more has become known on the variability, distribution and ecology of the about 2,000 other species that will eventually be included in this Flora. In the period 1987-1996 four volumes have been completed of this standard work, three are in preparation, and we hope that early in the twenty-first century, the set of 10 volumes will be finished. The present paper deals with a very striking little Entoloma species recently discovered in Diever, province of Drenthe, the Netherlands.
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Summary - Dicranoloma steenisii, a new species from Papua New Guinea is described here. Diagnostic features include long filiform leaves, a strong costa and absence of a limbidium and a central strand. It seems most closely related to D. armitii, from which it can be separated by the gradually attenuate, not contracted, leaves.
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Summary - The genus Microsorum, of which a revision will be published in the near future, consists of 50 species, including the here described M. aurantiacum. In Microsorum several groups may be distinguished, all linked by one to several intermediate species. Microsorum aurantiacum finds its nearest allies in the group of species that formerly were distinguished as the genus Phymatosorus. Although the type, which is also the only collection as yet, was collected already in 1909, reportedly with many duplicates, it remained unnamed, sitting in the herbarium of Berlin. It is easily distinguished from its allies in the nearly circular leaves with very narrow lobes.
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Summary - In a revision of the Malesian representatives of the genus Selliguea (Polypodiaceae) several recently collected specimens form Borneo were found to represent a very distinct, but hitherto undescribed species. From the few collections seen so far, it appears that the new species is not a very narrow endemic, and the fact that it has only been collected after 1970 probably is an indication of the increasingly intensive exploration of Borneo in recent times. In so far as the specimens had been identified, the names S. feei Bory and S. heterocarpa (Blume) Blume had been applied. In general habit, the species is closest to S. heterocarpa.
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Summary - On a field trip into the interior of Sabah, Borneo, in 1986, a small Bulbophyllum species (Orchidaceae) without flowers was collected, and transferred to the greenhouse of Mr. P. Jongejan, Amersfoort, the Netherlands. Only after several years the plant rewarded the good care given to it with a few sprigs of flowers. It then appeared to be an undescribed species of great elegance, belonging to the section Hirtula Ridley. It displays an unusual combination of characters: it has a distinctly elongated lip, as is found in B. jolandae J.J. Vermeulen, and B. lasioglossum Rolfe, which both have an elongated inflorescence. The new species, however, has a subumbellate inflorescence, as occurs in B. carinilabium J.J. Vermeulen, and B. hirtulum Ridley, which both have a shorter lip.
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Summary - The revision of the genus Chelonistele in Orchid Monographs 1 (1986) 23-40 lists 11 species and 4 variations. All occur in Borneo, which is evidently the centre of speciation of this genus; only Chelonistele sulphurea var. sulphurea occurs in addition in Java, Sumatra and the Malay Peninsula. During joint fieldwork in 1991 with staff of the Sarawak Herbarium in the Hose Mountains, Sarawak, the present author collected herbarium and live specimens of many orchids. Among the live orchids were quite a number of Chelonistele species from different habitats. Fifteen of these, belonging to six species, flowered in the Leiden Hortus Botanicus. Two are common and are well known from many herbarium specimens: C. sulphurea var. sulphurea and C. amplissima. Three were in 1986 known by a few specimens only: C. ingloria (7 specimens), C. unguiculata (3), and C. brevilamellata (20). One species, in the field represented by a few specimens, appeared to be new to science, and is described here.
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Summary - Alstonia R.Br. (Apocynaceae) is a pantropical genus occurring in Africa, India, Indo-China, Southeast Asia, Malesia, Australia, and eastwards to the Marquesas Islands and Central America. In the framework of the International MOF Tropenbos Kalimantan Project, a revision of the genus is in progress. Alstonia comprises six sections and about 45 species. One new species from Irian Jaya, Indonesia is described here.
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Summary - Whilst examining the specimens of Apocynaceae in Herbarium Bogoriense I came upon two unknown specimens which appeared to be species of Parsonsia. On further examination they turned out to belong to a new genus related to Parsonsia but differing from it in the stamens which are included within the corolla tube and the shape of the corolla, filaments and anthers. This is the second new genus recently discovered in Malesia, the first being Baharuia D.J. Middleton described from plants collected in Borneo and Sumatra. The name of the genus is a somewhat tongue-in-cheek reference to the funding for my work on Malesian Apocynaceae, the European Currency Unit or ECU. The genus was launched during the opening of the Van Steenis Building by Her Majesty Queen Beatrix of the Netherlands on June 11, 1996.
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Summary - The genus Anodendron A.DC. is revised. Formosia Pichon is included in synonymy. Seventeen species are recognised including two new species and two new combinations.
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Summary - The closely related genera Aganonerion, Parameria and Urceola are revised. One species of Aganonerion is recognised. Three species of Parameria are recognised and Parameriopsis is included in synonymy. Ecdysanthera, Chavannesia, Xylinabaria, Hymenolophus, Parabarium, Pezisicarpus, Xylinabariopsis and Chunechites are included in synonymy of Urceola in which 16 species are recognised. Within Urceola one new species is described.
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Summary - The new species Willughbeia lunduensis D.J. Middleton is described.
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Summary - Zonariophila semiendophytica is described as a new genus and species from the coast of the East Cape, South Africa. It is characterized by a single large elongate basal cell immersed in the thallus of Zonaria subarticulata (Lamour.) Papenf.; this laterally compressed cell gives rise, on both edges, to several short (up to 2.5 mm), uncorticated, erect, sparingly branched filaments. The position and structure of the procarp (the subapical cell in a determinate female fertile filament bears two sterile pericentral cells and one fertile pericentral cell, the latter with one sterile cell and a four-celled carpogonial filament), and the development of a single involucral filament from the hypogenous cell, put this genus in the immediate vicinity of Pleonosporium, and placement in the tribe Compsothamnieae is proposed.
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Summary - The present paper reviews the genus Aidia s.l. (including Anomanthodia and Gynopachis) in Southeast Asia and Malesia. Relationships to Pelagodendron are discussed. The taxonomic variation of characters within the genus is reviewed. In this review 16 new species and 2 new varieties are described, and 14 new species combinations are made in Aidia. Aidiopsis orophila and Fagerlindia canthoides are new combinations in the respective genera. A complete index of names is given.
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Summary - A revision is given for the 25 Malesian representatives of Panicum L. (Gramineae). Whiteochloa C.E. Hubb., a satellite genus, is represented by a single species, and is a new generic record for Malesia.
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Summary - Three new species of Festuca L. (Gramineae) from Malesia are described. A key and collector's list to all Malesian species are provided.
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Summary - Capparis buwaldae, a climber of primary forests endemic to Borneo, is a myrmecophyte with stem domatia. The stems become hollow by pith degeneration and develop oval openings allowing ants to enter. These openings are localized at a strictly defined area above the insertion of the leaves and a pair of nodal thorny stipules. They gradually split open from the outside. The openings may develop into elevated chimney-like structures or close again by growth if not kept open by ants. The plant may be inhabited by various opportunistically nesting arboreal ants including Crematogaster, Monomorium, and Camponotus species. Specialized myrmecophytic ants could not be found. Neither nectaries, nor food bodies, nor trophobiotic endophytic homopterans could be observed. In the Rijksherbarium, Leiden 65 other Capparis species and subspecies from the Indo-Australian region were examined for ant-plant characters. None of these species showed any myrmecophytic character.
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Summary - This paper is a precursor to the revision of the family Daphniphyllaceae in Flora Malesiana, in which 16 species of the genus Daphniphyllum will be treated. In the present paper a description is given of one new variety, D. gracile Gage var. newirelandum, and five new combinations have been made, D. ceramense, D. dichotomum, D. papuanum Hallier f. var. tuberculatum, D. sumatraense, and D. timorianum. An enumeration of the 16 species as will be treated in Flora Malesiana is given here; the numbering of the new variety and the five new combinations in the present paper is the same as will be used in Flora Malesiana. A key to sections, subsections and series is given. Pollen features, a distribution map of the two sections, and a line drawing of the new variety are provided.
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Summary - The differences in the fruit and seed of the two New Zealand species of Beilschmiedia, B. tarairi and B. tawa, indicate that these organs might be a fertile source of taxonomic characters in the genus. Beilschmiedia neocaledonica of New Caledonia is like B. tarairi in having a mucilaginous layer in both fruit wall and seedcoat, while B. tawa lacks these layers.
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Summary - Two new species of Dimeria R.Br. viz., D. copei and D. kalavoorensis are described and illustrated.
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Summary - A new species of the genus Thismia (Burmanniaceae), T. lauriana, from Kalimantan, is described and illustrated.
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Last modified June 21, 1996 by P. Hovenkamp.