A5038173828- Sesquiterpenes and Asteraceae Studies
- Plant Diversity and Evolution
- Botany, Ecology, and Taxonomy Studies
- Plant Toxicity and Pharmacological Properties
- Botany and Plant Ecology Studies
- Ecology and Vegetation Dynamics Studies
- Plant and Fungal Species Descriptions
- Natural product bioactivities and synthesis
- Phytochemistry and Biological Activities
- Plant and animal studies
- Rangeland and Wildlife Management
- Allelopathy and phytotoxic interactions
- Pacific and Southeast Asian Studies
- Fire effects on ecosystems
- Marine and coastal plant biology
- Botanical Research and Chemistry
- Geology and Paleoclimatology Research
- Traditional and Medicinal Uses of Annonaceae
- Botanical Research and Applications
- Plant Taxonomy and Phylogenetics
- Plant Parasitism and Resistance
- Lichen and fungal ecology
- Mycorrhizal Fungi and Plant Interactions
- Seed Germination and Physiology
- Genetic diversity and population structure
University of Hawaiʻi at Mānoa
2007-2021
University of Hawaii System
1992-2020
National Museum of Natural History
2008
Smithsonian Institution
2008
Oklahoma Biological Survey
2008
University of Oklahoma
2008
Whittier College
1981-1990
Occidental College
1981-1989
American Museum of Natural History
1987
University of Malawi
1986
Postfire succesion of the temporary herbaceous and suffrutescent cover was studied after chaparral fires in San Diego County, California, USA. Four categories species make up cover. (1) "Generalized perennials" are present before fire. Populations these herbs sparse under shrub canopy. They resprout fire from bulbs or other underground parts postfire populations sparse. (2) annuals" openings but produce their peak population size first few years (3) Specialized "fire—annuals" more less...
Vernonia is the largest genus of tribe Vernonieae with nearly 1000 species found predominately in New and Old World tropics. Morphological variation vegetative features extensive; however, floral characters are relatively uniform. This uniformity has led to difficulties understanding relationships within Vernonia. Pollen morphology distinctive taxonomic value as- sessing infrageneric groups. In an attempt understand better patterns radiation genus, pollen from over 500 was examined...
Succession of chaparral shrubs was studied for the first 4 years after fire on four major slope faces at three elevations in southern California. Although total cover fluctuated from year to year, shrub increased annually through third year. There little or no increase between and fourth years. Four covered 55% ground surface highest elevation site but only 28% lowest site. Shrub similar with one exception; twice as great north east‐facing slopes south west‐facing slopes. Post‐fire recovery...
Abstract Comprising more than 25 000 species, the Sunflower Family (Compositae or Asteraceae) is largest family of flowering plants. Many its lineages have experienced recent and rapid radiations, has a deep widespread history large‐scale gene duplications polyploidy. most important evolutionary questions about family's diversity remain unanswered due to poor resolution lack support for major nodes phylogeny. Our group employed phylogenomics approach using Hyb‐Seq that includes sequencing...
Abstract The classification of the family Compositae (Asteraceae) has been much improved in last decades by application molecular methods culminating recompilation published 2009, Systematics, evolution, and biogeography . Additional evidence relationships come from use high‐throughput sequencing methods. Our late colleague Vicki Ann Funk (1947–2019) was a pioneer this line research. Together with her team, she contributed to achievement mature family, which left outlined. In paper, we...
Germination of the fire‐following chaparral herbs, Emmenanthe penduliflora (Hydrophyllaceae) and Eriophyllum confertiflorum (Asteraceae), previously has been shown to be stimulated by charred wood from widespread shrub Adenostoma fasciculatum (Rosaceae). A series investigations undertaken clarify this effect gave following results. Light is not required, but may enhance response. The limited A. produced a wide variety non‐chaparral woods. Charring necessary; heated 175 C for 30 min same...
Two physiognomically similar but floristically dissimilar brushland areas of central Chile and southern California were compared to test the hypothesis that where dominant overstory vegetations are structurally functionally similar, understory or herbaceous will also be similar. This was tested in a relatively undisturbed site, heavily disturbed site burned within each study area. Values percent ground surface covered relative density obtained using line-intercept method. modifications this...
Postfire regeneration of the shrub and herb vegetation on eight coastal slopes California sage scrub was studied in first two growing seasons after fire. All species resprouted with exception suffrutescent Lotus scoparius, though it is not known if this alive prior to It estimated that 70 %o prefire populations these sprouts covered one third ground surface by end second season. In contrast chaparral, seedling establishment from soil-stored seed low (102-103/ha) 1st postfire year. Resprouts...
External pollen morphology of 39 species West Indian Vernonias was examined by light and scanning electron microscopy in conjunction with a systematic revision these species. There were three distinct types pollen: Type A: subechinolophate, tricolporate grains prominent spines; B: echinolophate, expanded germinal furrows coincident polar muri; C: lacunae. Pollen intermediate between the major found several These same had very atypical megamorphologies. In general, to correlate well...
Identification of the progenitors plants endemic to oceanic islands often is complicated by extreme morphological divergence between island and continental taxa. This especially true for Hawaiian Islands, which are 3,900 km from any source. We examine origin Hesperomannia , a genus three species Hawaii that always have been placed in tribe Mutisieae sunflower family. Phylogenetic analyses representatives all tribes this family using chloroplast gene ndhF (where ND5 protein NADH...
PREMISE With over 1500 species, the globally distributed Vernonieae is one of most successful members largest family flowering plants, Compositae. However, due to its morphological complexity and limited geographic representation in previous studies, subtribal biogeographic relationships are unclear. Here, new DNA sequence data spanning range tribe provides a taxonomically robust time‐calibrated phylogeny, estimates migration pathways timing important events, allows inference environmental...
Succession of chaparral shrubs was studied for the first 4 years after fire on four major slope faces at three elevations in southern California. Although total cover fluctuated from year to year, shrub increased annually through third year. There little or no increase between and fourth years. Four covered 55% ground surface highest elevation site but only 28% lowest site. Shrub similar with one exception; twice as great north east-facing slopes south west-facing slopes. Post-fire recovery...
The r- and K-selection theory was used to generate test- able hypotheses about patterns of energy allocation in two chaparral shrubs different reproductive strategies. Terminal-branchlet vegeta- tive biomass the nonsprouting Arctostaphylos glauca sprouting A. glandulosa were sampled a 23-year-old 90-year-old stand test predictions that: (1) ter- minal vegetative growth (g dry weight/m2 areal coverage) would be equal species, both stands; (2) oven weight (g) parts/m2 coverage greater than...
Abstract— A phylogenetic hypothesis of American Vernonieae based on three molecular regions (ITS, ndhF, rpl32-trnL) and a morphological dataset reveals the existence four main lineages. Three these lineages correspond, with few adjustments, to subtribes Chrestinae, Lychnophorinae, Vernoniinae. The fourth lineage, which has never been recognized at taxonomic rank due lack characterization, is mainly composed taxa usually included in Lepidaploinae Elephantopinae as well number genera...
Abstract Compositae (Asteraceae) are the largest flowering plant family (23,000 to 30,000 species) and its members found throughout world in both temperate tropical habitats. The subfamilies tribes of remained relatively constant for many years; recent molecular studies, however, have identified new subfamilial groups previously unknown relationships. Currently there 35 10 (Baldwin & al., 2002; Panero Funk, 2002). Some not been tested monophyly without a clear understanding major genera...