R. Levin

Publications45
h-index19
Citations1,655
Highly Influential Citations115
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Phylogenetic relationships among the “spiny solanums” (Solanum subgenus Leptostemonum, Solanaceae)
TLDR
Sharp prickles and/or stellate hairs evolved more than once in Solanum, and floral heterandry originated multiple times within the ‘‘spiny solanums’’ waxy.
Fragrance chemistry, nocturnal rhythms and pollination "syndromes" in Nicotiana.
Relationships within tribe Lycieae (Solanaceae): paraphyly of Lycium and multiple origins of gender dimorphism.
TLDR
Results indicate that transitions in sexual expression are convergent, occurring multiple times in North America and southern Africa, and suggest a single dispersal event from the Americas to the Old World, and frequent dispersal between North and South America.
Family-level relationships of Onagraceae based on chloroplast rbcL and ndhF data.
TLDR
Results strongly support a monophyletic Onagraceae, with Ludwigia as the basal lineage and a sister-taxon relationship between Megacorax and Lopezia, and Gongylocarpus is supported as sister to Epilobieae plus the rest of Onagreae, although relationships within the latter clade have limited resolution.
Fragrance chemistry and pollinator affinities in Nyctaginaceae.
A four-gene study of evolutionary relationships in Solanum section Acanthophora.
TLDR
This study inferred phylogenetic relationships among 29 Solanum taxa, including 14 species of section Acanthophora, using DNA sequence data from two nuclear regions (ITS and the granule-bound starch synthase gene [GBSSI or waxy]) and two chloroplast regions (trnT-trnF and trnS-trNG).
A Tale of Two Continents: Baker's Rule and the Maintenance of Self-Incompatibility in Lycium (Solanaceae)
TLDR
The present data provide a dramatic exception to Baker's rule and support a key assumption of the Miller and Venable (2000) model, namely that self-incompatibility is associated with diploidy and cosexuality.
Paraphyly in Tribe Onagreae: Insights into Phylogenetic Relationships of Onagraceae Based on Nuclear and Chloroplast Sequence Data
Abstract Onagraceae are a family of 17 genera in seven tribes, with the majority of species in tribes Onagreae and Epilobieae. Despite the species-richness of these two tribes, to date no…
FLORAL BIOLOGY OF NORTH AMERICAN OENOTHERA SECT. LAVAUXIA (ONAGRACEAE): ADVERTISEMENTS, REWARDS, AND EXTREME VARIATION IN FLORAL DEPTH1, 2
TLDR
Quantitative aspects of floral advertisement and reward are dramatically reduced in putatively autogamous taxa of section Lavauxia, making this an excellent model system for measuring the costs and mechanisms of shifts between outcrossing and autogamy.
A new generic circumscription in tribe Lycieae (Solanaceae)
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