S. Keeley

Publications59
h-index25
Citations2,116
Highly Influential Citations119
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Everywhere but Antarctica: using a supertree to understand the diversity and distribution of the Compositae.
TLDR
The results of molecular phylogenetic studies of members of tribes Helenieae, Heliantheae, and Eupatorieae (Asteraceae) and General systematics and proposed taxonomic changes in current classification are presented.
A phylogeny of the "evil tribe" (Vernonieae: Compositae) reveals Old/New World long distance dispersal: support from separate and combined congruent datasets (trnL-F, ndhF, ITS).
Molecular evidence for an African origin of the Hawaiian endemic Hesperomannia (Asteraceae).
TLDR
Phylogenetic comparisons within the Vernonieae using sequences of both ndhF and the internal transcribed spacer regions of nuclear ribosomal DNA reveal that Hesperomannia is sister to African species of Vernonia, suggesting long-distance dispersal northeastward from Africa to southeast Asia and across the many Pacific Ocean island chains is the most likely explanation for this unusual biogeographic connection.
Postfire Succession of the Herbaceous Flora in Southern California Chaparral
TLDR
Postfire succesion of the temporary herbaceous and suffrutescent cover was studied after chaparral fires in San Diego County, California, USA in light of differences in population dynamics of the four groups.
Post-fire recovery of California coastal sage scrub
TLDR
It was estimated that 70 %o of the prefire shrub populations resprouted and these sprouts covered one third of the ground surface by the end of the second season, and shrub cover doubled, largely from resprouts, annual herb cover declined markedly and perennial herb cover remained relatively constant.
Insights into the evolution of the tribe Arctoteae (Compositae: subfamily Cichorioideae s.s.) using trnL-F, ndhF, and ITS
TLDR
The analyses showed robust support for two outgroup clades, Liabeae-Vernonieae and Gundelieae-Lactuceae and two main subtribes within Arctoteae and Gorteriinae, which shows that the unusual taxa are of critical importance, and they should be included in any molecular analysis.
CLADISTICS OF THE BRYOPSIDALES: A PRELIMINARY ANALYSIS
TLDR
The first comprehensive compilation of reported morphological, reproductive, and subcellular characteristics for genera in the Bryopsidales is presented, which identified phylogenetically informative and uninformative characters.
Distribution of Pollen Types in Vernonia (Vernonieae: Compositae)
TLDR
In an attempt to understand better the patterns of radiation in the genus Vernonia, pollen from over 500 species of Vernonia was examined from throughout the geographical range by light microscopy and SEM.
Systematics and Evolution of Syncephaly in American Vernonieae (Asteraceae) with Emphasis on the Brazilian Subtribe Lychnophorinae
TLDR
Results show that syncephaly has been historically used to delimit the subtribe Lychnophorinae, and that this character probably appeared independently three or four times in the evolution of American Vernonieae.
CHARRED WOOD STIMULATED GERMINATION OF TWO FIRE‐FOLLOWING HERBS OF THE CALIFORNIA CHAPARRAL AND THE ROLE OF HEMICELLULOSE
TLDR
An oligosaccharin-type molecule is postulated to be produced by heating xylan or other hemicelluloses with glucuronic acid side chains, derived from galactouronic acid and xyloglucan which are structurally and functionally related to compounds tested here.
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