<i>Wurmbea calcicola</i> (Colchicaceae), a new species from Cape Naturaliste, south western Australia

Macfarlane, Terry Desmond

doi:10.58828/nuy00204

Cited by 2 publications

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“…(Colchicaceae) has been extensively studied taxonomically, with modern revisions having been published for Australia (Macfarlane 1980(Macfarlane , 1987 and South Australia (Bates 1995(Bates , 2007 and occasional additional species described (e.g. Macfarlane 1993, Macfarlane & van Leeuwen 1996. The genus also occurs in Africa (Nordenstam 1978(Nordenstam , 1986Vinnersten & Manning 2007).…”

Section: Introductionmentioning

confidence: 99%

Wurmbea inflata (Colchicaceae), a new species from the Gascoyne region of Western Australia

Macfarlane¹,

Case²

2007

Nuytsia

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Macfarlane, T.D. & Case, A.L. Wurmbea inflata (Colchicaceae), a new species from the Gascoyne region of Western Australia. Nuytsia 17: 223-228 (2007). A new species of Wurmbea, W. inflata T.Macfarlane & A.Case, is described and illustrated with photographs and a distribution map. The new species is known from a number of populations from the Kennedy Range to east of Mt Augustus, where it grows on rocky hillsides. It is notable for the enlarged fruits composed of four carpels.

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Section: Introductionmentioning

confidence: 99%

Wurmbea inflata (Colchicaceae), a new species from the Gascoyne region of Western Australia

Macfarlane¹,

Case²

2007

Nuytsia

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The ecology and evolution of gender strategies in plants: the example of Australian Wurmbea (Colchicaceae)

Barrett

Case

2006

Aust. J. Bot.

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Angiosperms possess diverse sexual systems, often with different combinations of hermaphroditic, pistillate and staminate flowers. Despite this sexual diversity, most populations are either monomorphic or dimorphic with respect to gender strategy, where gender refers to the relative contribution that individuals make to fitness through female and male function. An important problem in evolutionary biology is to determine how and why variation in gender strategies originates and is maintained. Wurmbea (Colchicaceae), a genus of insect-pollinated geophytes, has recently become the focus of ecological and evolutionary studies aimed at understanding these issues. Phylogenetic reconstructions suggest dispersal from Africa to Australia, then New Zealand, and multiple transitions between monomorphic and dimorphic sexual systems within Australia. Microevolutionary studies of W. dioica and W. biglandulosa, two wide-ranging taxa with monomorphic and dimorphic populations, provide insights into the selective mechanisms governing transitions between sexual systems. Dimorphic populations of these taxa likely comprise independent origins of dimorphism via the gynodioecious pathway by invasion of females into monomorphic populations. Shifts in pollination biology and flower size, and their consequent effects on mating patterns, may have contributed to the evolution of gender dimorphism. Pollinator-mediated selfing and inbreeding depression provide a sufficient fertility advantage for females to be maintained in dimorphic populations. Once dimorphism establishes, increasing gender specialisation is associated with invasion of more arid environments. Inbreeding avoidance, particularly under stressful ecological conditions, is the most likely selective mechanism maintaining gender dimorphism in Wurmbea. We conclude our review by suggesting avenues for future research that might provide a more comprehensive picture of the evolution of gender strategies in Wurmbea.

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Wurmbea calcicola (Colchicaceae), a new species from Cape Naturaliste, south western Australia

Abstract: Wurmbea calcicola (Colchicaceae), a new species from Cape Naturaliste, south western Australia

Cited by 2 publications

References 1 publication

Wurmbea inflata (Colchicaceae), a new species from the Gascoyne region of Western Australia

Wurmbea inflata (Colchicaceae), a new species from the Gascoyne region of Western Australia

The ecology and evolution of gender strategies in plants: the example of Australian Wurmbea (Colchicaceae)

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