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  • 1
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    A S.E.M.-investigation on the development of free carpels (1981)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.27 (1981) nr.2 p.499
    Details
    Publication Date: 2015-03-06
    Description: The early development (ontogeny) of the carpels of 20 species belonging to 8 apocarpous families was investigated with the scanning electron microscope. The results indicate that on the floral apex a circular or a convex meristem develops into an obliquely ascidiate primordium by unequal growth of its periphery. By further unequal growth it develops into a young carpel. The terminal mouth of a cup becomes the lateral cleft of a carpel. The different forms of the young carpels in different species are defined by the varying degree of development of the adaxial region of the initial meristem and/or its margin on the side of the floral apex. This hypothesis is theoretically evaluated.
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 2
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    The distally lobed inner integument of Hernandia peltata Meissn. in DC. (Hernandiaceae) (1971)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.19 (1971) nr.1 p.147
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    Publication Date: 2015-03-06
    Description: A peculiar structural detail, occurring during the development of ovules, seems to have passed almost unnoticed till the present day. It concerns the distal rim of either the outer or the inner integument, which appears to be slightly lobed in the ovules of several unrelated plants. In a recent note (1970) I called attention to this feature. It is known from Juglans and Platycaria (Warming, 1878; Leroy, 1955; Boesewinkel and Bouman, 1967), where the single integument is two-lobed. Warming mentioned two more cases, namely Lagarosiphon and Symplocarpus; however, I cannot confirm his observations from dried material. I noticed it myself in Scyphostegia horneensis, in Caloncoba welwitschii, and in Sterculia alexandri. In these three species the lobes occur at the rim of the outer integument. To these can now be added Hernandia peltata. However, in that species the lobes occur at the rim of the inner integument.
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 3
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    Reviews (1996)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.41 (1996) nr.2 p.469
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    Publication Date: 2015-03-06
    Description: This project of the Royal Botanic Garden Edinburgh aims to provide regional manuals and on-line identification computer programs to the timber species of Dipterocarpaceae. The Singapore manual is a first trial, later editions should include other islands in the Malay Archipelago. The possibility is also offered to have tailor-made manuals for specific regions against cost price. Many data have been gathered, especially vegetative characters one can readily observe while standing underneath these enormous trees. In this respect the database will be very useful, because due to the very irregular flowering of the Dipterocarpaceae, flowers and fruits are usually unavailable, and even if they are present, they are found high in the tree.
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 4
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    Reviews (1966)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.14 (1966) nr.2 p.355
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    Publication Date: 2015-03-06
    Description: This is the second book by professor Meeuse on the phylogenetic morphology of the reproductive organs of the Higher Cormophytes. It is superior to the first *, not only in the get-up, but also in providing some more information on the principles of the author. The core is disclosed in: ‘all we can do is to postulate a phylogenetic genealogy, using all available (palaeobotanical) evidence, and build up the evolutionary sequences in the phylogeny of the organs, the semophyleses, along our framework’. And: ‘Typology is to be checked by fossil data’. We meet the method of the New Morphology, as it was started by H. Hamshaw Thomas. The phylogenetic line depicted leads from the Progymnospermopsida Beck through Cycadopsid Gymnosperms towards Angiosperms. It is impossible to distinguish Angiosperms from Gymnosperms. They are specialised Cycadopsid Gymnosperms, exhibiting polyrheitric angiospermic trends, such as angi-ovuly, double fertilisation, dormant embryo phase, flower types, wood vessels, and aperturate pollen. Some groups have not reached the ultimate level in part of these characters.
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 5
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    On the development of some Gynoecia with septal nectaries (1988)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.33 (1988) nr.2 p.477
    Details
    Publication Date: 2015-03-06
    Description: Septal nectaries are formed by local regions of later nectariferous epidermal cells on the sides of the carpels at their very base. In order that the epidermal cells may differentiate into nectariferous cells, the carpels which constitute the gynoecium have to develop as separate organs. It was argued that if no septal nectaries develop, this free carpel development does not take place. The nectariferous regions get shaped as nectar containers by dermal fusion of the sides of the carpels surrounding them, by upward growth of the apex, and mostly also by meristematic continuity of part of the ovary wall on the outside. By the latter the level of the openings of the nectaries on the ovary is defined. Septal nectaries in Monocotyledons are considered original.
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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  • 6
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    Anatomical and ontogenetic investigations on the morphology of the flowers and the fruit of Scyphostegia borneensis Stapf (Scyphostegiaceae) (1967)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.15 (1967) nr.1 p.107
    Details
    Publication Date: 2015-03-06
    Description: New details could be derived from the study of fixed male and female flowers of Scyphostegia borneensis Stapf. Of prime importance among these is the exact structure of the female reproductive units. They correspond to what are generally recognized as ovules. These anatropous ovules have a constriction separating funicle and raphe, an aril (loid) of mixed character, a distal integumental extension, and a fivelobed exostome. Their placentation is basal. Together, they are enclosed by an urceolate wall consisting of three-trace units which are apically stigmatic. These sterile units form septs growing downwards between the tips of the ovules, giving rise to locules which are open below. The morphological interest of some of these details was discussed. The embryosack development could be followed. The fruit appeared to be a fleshy capsule. The striking similarity with certain formations in the Monimiaceae is not based on affinity. As to the above characters the alleged affinity with the Flacourtiaceae could not be checked because comparable characters in that family have never been studied. However, there is a correspondence with such details known in the Tamaricaceae. Moreover, in the Tamaricaceae the placentation is intermediate between basal and parietal. This was considered to favour the inclusion of the Scyphostegiaceae in the Parietales. Of all the Parietales families they must be nearest to the Flacourtiaceae, as judged from external characters.
    Repository Name: National Museum of Natural History, Netherlands
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  • 7
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    A deviating female flower of Cercidiphyllum japonicum (Cercidiphyllaceae) (1986)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.31 (1986) nr.2 p.273
    Details
    Publication Date: 2015-03-06
    Description: In one ‘flower’ a growing point occurred between a bract and its seemingly inverted carpel.
    Repository Name: National Museum of Natural History, Netherlands
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  • 8
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    The early development of inflorescences and flowers of the oil palm (Elaeis guineensis Jacq.) seen through the scanning electron microscope (1987)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.32 (1987) nr.1 p.67
    Details
    Publication Date: 2015-03-06
    Description: The development of inflorescences and flowers of the African Oil Palm up to anthesis is illustrated by scanning electron microscopy images. The time of origin relative to the development of the foliage leaves of the basipetalous succession of flowering rachillae is determined, as well as the time of morphological sex definition. The logical stage when sex is determined is inferred to be not before the first appearance of the spikelet primordia. Female flower groups develop acropetally as triaxial cincinni, the male units as reduced ones. A developmental diagram is added.
    Repository Name: National Museum of Natural History, Netherlands
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  • 9
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    Review (1972)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.20 (1972) nr.1 p.104
    Details
    Publication Date: 2015-03-06
    Description: This book is an exploration into the field of Plant Morphology. It deals with the placentation of the ovules in ten families of Centrospermae — including the Cactaceae — and in the Primulaceae. The core is formed by a very close observation and a complete documentation of the histogenesis of the ovary wall, the septs, and the placentae in four Caryophyllaceous species. Furthermore, the result is compared with similar known and newly discovered features in other species and in the other families. It appears that the ovary is composed of a cup of sterile phyllomes which surrounds a central body. This central part is built up by two alternating sets of five axial placentae bearing the ovules. The septs grow from the cup inwards and fuse with the placentae and their ovules. The pattern of the vascular bundles is in full accordance with the histogenetic results. Variations on this theme occur in the other species and families, the ultimate stage in reduction being an ovary with a solitary terminal ovule. However, the Primulaceae do not fit in this scheme; they cannot be considered as Centrospermae.
    Repository Name: National Museum of Natural History, Netherlands
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  • 10
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    The ascidiform early development of free carpels, a S.E.M.-investigation (1983)
    In:  Blumea - Biodiversity, Evolution and Biogeography of Plants (0006-5196) vol.28 (1983) nr.2 p.231
    Details
    Publication Date: 2015-03-06
    Description: Carpels develop centripetally as oblique slightly ascidiform structures provided with a seat-like support. The terminal mouth of the ascidiform primordium becomes the lateral cleft of the carpel. Solitary terminal carpels develop as lateral structures. The sections Tasmannia and Drimys of the genus Drimys differ by the varying degree of ascidiform development. Austrobaileya is like Drimys. The structure of the carpel margins with submarginal placentation may have evolved from a slit like that in Winteraceae. Allometric development of an oblique ascidiform structure may have formed a large basal ovary, and may thus have moved the stigmatic part apically. A possible cupular origin of carpels is discussed.
    Repository Name: National Museum of Natural History, Netherlands
    Type: Article / Letter to the editor
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