Cover Illustration: Scanning electron micrograph of wood of Marcgravia umbellata (Marcgraviaceae), a lianous native of the neotropics, showing coalescent pits in the inner wall of a vessel element (pit apertures ca. 2-3 ;gmm). Despite some characteristic features related to the lianous habit, such as wide vessels that co-occur with narrow vessels, axial parenchyma in proximity to vessels, and wide multiseriate rays, the wood of Marcgraviaceae can be linked to its close relative Tetrameristaceae s.l. See Lens et al.: Relationships within balsaminoid Ericales: a wood anatomical approach, pp. 941-953 in this issue. Photo credit: Frederic Lens.
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