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This new species is apparently labile in its reproductive expression, lending to its epithet, and is a model for the sort of sexual fluidity that is present throughout the plant kingdom. eburneum species group and a key to the andromonoecious Solanum species of the Northern Territory of Australia. plastisexum as a distinctive entity, a description of the species, representative photographs, a map showing the distribution of members of the S. We present evidence supporting the recognition of S. watneyi Martine & Frawley in both reproductive and vegetative characters. jobsonii Martine, J.Cantley & L.M.Lacey, S. plastisexum differs statistically from all of its closest relatives including S. Morphometric analyses presented here reveal that S. A member of Solanum subgenus Leptostemonum, Solanum plastisexum is allied to the S. When in fruit, the distal rachis may abcise and drop. exhibits multiple reproductive phenotypes, with solitary perfect flowers, a few staminate flowers or with cymes composed of a basal hermaphrodite and an extended rachis of several to many staminate flowers. Although now recognised to be andromonoecious, S. shakers, tumbleweeds, rafting) as a means to maintain current populations and establish new ones.Ī bush tomato that has evaded classification by solanologists for decades has been identified and is described as a new species belonging to the Australian “Solanum dioicum group” of the Ord Victoria Plain biogeographic region in the monsoon tropics of the Northern Territory. Because of this, some taxa might now rely on secondary dispersal mechanisms (e.g. The general lack of direct evidence related to biotic dispersal (epizoochorous or endozoochorous) may be a function of declines and/or extinctions of vertebrate dispersers. Our results suggest that epizoochorous trample burr seed dispersal (strongly linked to calyx accrescence) is far more common among Australian Solanum than previously thought and support the hypothesis that the combination of large fleshy fruits and endozoochorous dispersal represents a reversal in this study group. We combine field/greenhouse observations and specimen-based study with phylogenetic analysis of seven nuclear regions obtained via a microfluidic PCR-based enrichment strategy and high-throughput sequencing, and present the first species-tree hypothesis for the S. This is especially true for plant-animal interactions, including the influence of fruit form and calyx morphology on seed dispersal. dioicum group”) of the Australian Monsoon Tropics have been the subject of phylogenetic and taxonomic study for decades, yet much of their basic biology is still unknown.
The dioecious and andromonoecious Solanum taxa (the “S.
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