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  • 1
    Electronic Resource
    Electronic Resource
    Die Stipeln derIrvingioideae undRecchioideae und ihre systematische Wertung nebst Bemerkungen zur Holzanatomie und Palynologie (1980)
    Springer
    Plant systematics and evolution 133 (1980), S. 261-283 
    Details
    ISSN: 1615-6110
    Keywords: Simaroubaceae ; Irvingiaceae ; Ixonanthaceae ; Erythroxylaceae ; Irvingia ; Klainedoxa ; Desbordesia ; Allantospermum ; Ochthocosmus ; Cadellia ; Guilfoylia ; Recchia ; Stipules ; pseudostipules ; metastipules ; wood anatomy ; palynology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract TheSimaroubaceae generally have no true stipules. The stipule-like appendages of some genera proved to be pseudo- or metastipules (Weberling & Leenhouts 1965). There seem to be some exceptions, however: the generaCadellia (incl.Guilfoylia) andRecchia on the one hand, and theIrvingioideae on the other. As these taxa, with exception ofRecchia, have simple leaves, there are no indications that their stipule-like appendages might be pseudo- or metastipules. In regard to their position and ontogeny these appendages behave completely like true stipules. Assuming the view ofForman, one could conceive a morphological line from the long, broadly inserted axillary stipules of mostIrvingioideae to the small scaly triangular stipules ofIxonanthoideae. The similarities between the stipules ofIrvingioideae andErythroxylaceae (already emphasized byHallier and others), become even more evident when their ontogeny is investigated. TheIrvingioideae, therefore, might be regarded as a separate family (perhaps with some relation to theErythroxylaceae,Hallier) or as a subfamily ofIxonanthaceae (Forman).—In addition to data on stipules some results on the palynology and shoot anatomy of the generaCadellia (incl.Guilfoylia) andRecchia are reported. Their relationship with theSimaroubaceae also appears doubtful. If they are to be included, they represent a somewhat isolated group near the base of the family which otherwise has lost its stipules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984383
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  • 2
    Electronic Resource
    Electronic Resource
    Morphologische, anatomische und palynologische Untersuchungen an der GattungAretiastrum (Valerianaceae) (1977)
    Springer
    Plant systematics and evolution 127 (1977), S. 217-242 
    Details
    ISSN: 1615-6110
    Keywords: Valerianaceae ; Valeriana ; Aretiastrum ; Growth form ; morphology and histology of shoot and leaf ; palynology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The fiveAretiastrum species investigated are differentiated by morphological, histological and palynological characteristics from one another and from woodyValeriana species. It seems justified to regardAretiastrum at least as a distinct section ofValeriana but better as a separate genus.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985989
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  • 3
    Electronic Resource
    Electronic Resource
    On the inflorescence structure ofAsclepiadaceae (1995)
    Springer
    Plant systematics and evolution 197 (1995), S. 99-109 
    Details
    ISSN: 1615-6110
    Keywords: Asclepiadaceae ; Inflorescence ; morphology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Inflorescence structure in the familyAsclepiadaceae, particularly in the subfamilyAsclepiadoideae, is elucidated using the methodology and terminology of the school ofW. Troll. Asclepiadaceae inflorescences are principally thyrsoid systems, with variability resulting from different degrees of reduction of dichasial paracladia to bostryces, sciadioids, and, finally, to single flowers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00984635
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  • 4
    Electronic Resource
    Electronic Resource
    Transferzellen im Xylem derValerianaceae (1987)
    Springer
    Plant systematics and evolution 156 (1987), S. 69-89 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Valerianaceae ; Xylem transfer cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Stems, incl. rhizomes, and roots of 42 species ofValerianaceae were investigated in order to reveal the occurrence, structure and distribution of xylem transfer cells. Within nodes and internodes their frequency, distribution and gradients of development are similar to other families. — Within the secondary xylem of some species transfer cells can develop from cambial derivates, inValeriana tuberosa andPatrinia villosa even from pith cells. Within the turnip ofV. tuberosa transfer cells are very frequent and well developed. Here, after degradation of the cell-wall ingrowths they can be redifferentiated into storage cells which usually contain starch grains (“Hüllenstärkekörner”). In the transitional zone between stem and root of some predominantly herbaceous taxa transfer cells are often very frequent and form large protuberances before they degrade and lignify. SEM observations inValeriana decussata show that the cell-wall ingrowths are degradated at the beginning of lignification with the exception of brush-like protuberances remaining in the half-bordered pit-pairs. During the subsequent process of lignification the simple pits of a wall adjacent to a vessel can be transformed into corresponding pit-pairs. In this case the residues of the protuberances within the pit chamber can be transformed into incrustations similar to the vestures of bordered pits described byBailey (1933). Structural similarities between the brush-like protuberances in the half-bordered pits of theValeriana transfer cells and the ingrowths found inLauraceae (Castro 1982, 1985) are evident. Supposedly, all the cambial derivatives inValerianaceae can develop protuberances at least within their pits. Thus, it appears possible to interpret the vestures of the bordered pits as rudimentary protuberances, and to suggest that they have a specific function in the selective transport of solutes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00937203
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