S
S. D. Sipes
Researcher at Utah State University
Publications - 14
Citations - 1085
S. D. Sipes is an academic researcher from Utah State University. The author has contributed to research in topics: Pollination & Spiranthes diluvialis. The author has an hindex of 9, co-authored 14 publications receiving 1041 citations. Previous affiliations of S. D. Sipes include Southern Illinois University Carbondale.
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Journal ArticleDOI
Horsetails and ferns are a monophyletic group and the closest living relatives to seed plants.
Kathleen M. Pryer,Harald Schneider,Alan R. Smith,Raymond Cranfill,Paul G. Wolf,Jeffrey S. Hunt,S. D. Sipes +6 more
TL;DR: It is shown that there are three monophyletic groups of extant vascular plants: (1) lycophytes, (2) seed plants and (3) a clade including equisetophytes (horsetails, psilotophytes) and all eusporangiate and leptosporangiates ferns.
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Pollen‐host specificity and evolutionary patterns of host switching in a clade of specialist bees (Apoidea: Diadasia)
TL;DR: Diadasia species are more likely to use host-plant families that are used by other Diadasia and Emphorine bees; however, there was no evidence of residual adaptation to ancestral hosts, and diet breadth appears to be a labile trait.
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Phylogenetic Relaitionships of the Enigmatic Fern Families Hymenophyllopsidaceae and Lophosocoriaceae: Evidence From rbcL Nucleotide Sequences
Paul G. Wolf,S. D. Sipes,Martha R. White,Michael L. Martines,Kathleen M. Pryer,Alan R. Smith,Kunihiko Ueda +6 more
TL;DR: Both newly-examined families appear to be part of a previously characterized and well-supported clade of tree ferns, and a sister relationship between Lophosoria and Dicksonia and also between Hymenophyllopsis and Cyathea is supported.
Journal ArticleDOI
Reproductive biology of the rare orchid, Spiranthes diluvialis: Breeding system, pollination, and implications for conservation
S. D. Sipes,Vincent J. Tepedino +1 more
TL;DR: Observations indicate that bumblebees (Bombus spp.) are the most important pollinators of S. diluvialis and land managers must include pollinators and pollen-producing plants in their plans to preserve this rare orchid.
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Species-independent, geographical structuring of chloroplast DNA haplotypes in a montane herb Ipomopsis (Polemoniaceae)
TL;DR: The pattern in Ipomopsis is consistent with both primary intergradation (independent speciation in each area of sympatry) or secondary intergradation involving complete cytoplasmic replacement, and additional data are needed to explain the origin of hybrid zones in I pomopsis.