Spiral thickenings in the axial Parenchyma of Chrysobalanaceae

Spiral thickenings in the axial parenchyma, seldom recorded in the secondary xylem of the dicotyledons so far, are described for a number of genera and/or species of Chrysobalanaceae. In 66 out of 99 samples investigated, representing most genera of the Chrysobalanaceae, spiral thickenings proved to be present. Some genera, such as Parinari, lack spirals while others like Chrysobalanus, Exellodendron and Hirtella comprise only species with spiral thickenings. In Acioa, Couepia, Cyclandrophora, Licania and Maranthes only a part of the species have spirals in their parenchyma cells. Data on distribution and appearance are given. No connection with tension wood could be demonstrated, neither is the presence related to juvenile wood. Taxonomic value of the spirals in the axial parenchyma is discussed

Systematic wood anatomy and affinities of the Urticaceae

The wood anatomy of all tribes of the Urticaceae, a family of herbs, shrublets, and sometimes shrubs, trees or lianas, has been studied and described in detail. Special attention is given to the interpretation of the characters in terms of taxonomy and phylogeny. A classification, in part deviating from the existing morphological classification, is presented. Finally, the relationship within the Urticaceae, as well as the relationships with the Ulmaceae and Moraceae (including Cecropiaceae) are discussed

Colophospermum reduced to Hardwickia (Leguminosae-Caesalpinioideae).

Volume: 19Start Page: 279End Page: 29

Systematic wood anatomy of the tribe Guettardeae (Rubiaceae)

Systematic wood anatomy of the tribe Guettardeae (Rubiaceae). The wood anatomy of nearly all genera of the Guettardeae (Rubiaceae, Guettardoideae) has been examined, and in this respect the tribe is heterogeneous. Suggestions are made for a delimitation of the tribe. Guettarda, Bobea, Antirhea, Malanea and Chomelia Jacq. are sufficiently similar in their wood anatomical characters to warrant retention in the same tribe. Machaonia, Timonius and Dichilanthe are anomalous. Suggestions are given for taxonomic revisions of some genera based on their wood anatomy