A5061857854- Botany, Ecology, and Taxonomy Studies
- Plant Diversity and Evolution
- Plant and Fungal Species Descriptions
- Plant and animal studies
- Rangeland and Wildlife Management
- Marine and coastal plant biology
- Fern and Epiphyte Biology
- Archaeology and Natural History
- Botanical Research and Applications
- Plant Pathogens and Resistance
- Plant Parasitism and Resistance
- Genetic diversity and population structure
- Plant Taxonomy and Phylogenetics
- Ecology and Vegetation Dynamics Studies
- Tendon Structure and Treatment
- Orthopedic Surgery and Rehabilitation
- Species Distribution and Climate Change
- Freshwater macroinvertebrate diversity and ecology
- Shoulder Injury and Treatment
- Wildlife Ecology and Conservation
- Botanical Research and Chemistry
- Aquatic Ecosystems and Phytoplankton Dynamics
- Plant Physiology and Cultivation Studies
- Soil Mechanics and Vehicle Dynamics
- Ethnobotanical and Medicinal Plants Studies
Santa Barbara Botanic Garden
2016-2024
University of California, Berkeley
2013-2016
San Diego State University
2010-2013
Abstract The Boraginales are now universally accepted as monophyletic and firmly placed in Lamiidae. However, a consensus about familial classification has remained elusive, with some advocating recognition of single, widely variable family, others proposing several distinct families. A is proposed here, based on recent molecular phylogenetic studies, morphological characters, taking nomenclatural stability into consideration. We suggest the eleven, morphologically well‐defined clearly...
Abstract Boraginaceae s.str. is a subcosmopolitan family of 1600 to 1700 species in around 90 genera, and recent phylogenetic studies indicate that the infrafamilial classification as currently used highly obsolete. The present study addresses relationships major clades with an emphasis on monophyly of, between previously recognized position various unplaced genera such Afrotysonia, Anoplocaryum, Brachybotrys, Chionocharis, Craniospermum, Thyrocarpus , Trigonocaryum using three plastid...
PREMISE OF THE STUDY: Historical patterns and processes of plants with an American amphitropical disjunct (AAD) distribution have long interested botanists biogeographers. Here we update examples AAD vascular plants, their biogeographic history, aspects biology elucidated by recent studies to make inferences about common formulate future research questions. METHODS: All known were tabulated, along data on plant duration habit, chromosome number, dispersal direction, divergence time. The then...
Early angiosperm evolution, beginning approximately 140 million years ago, saw many innovations that enabled flowering plants to alter ecosystems globally. These included the development of novel, flower-based pollinator attraction mechanisms and increased water transport capacity in stems leaves. Vein length per area (VLA) leaves nearly threefold first 30–40 increasing for transpiration photosynthesis. In contrast leaves, high capacities flowers may not be an advantage because do typically...
Abstract Subtribe Amsinckiinae, currently containing 13 genera and approximately 287 species, is a species‐rich group of the family Boraginaceae. Past studies assessing relationships had limited sample size generally weak support. Here we study phylogenetic Amsinckiinae using large considerably more sequence data in order to evaluate interrelationships clades within this group. Using high‐throughput, genome skimming sequencing 139 samples four outgroup taxa, maximum likelihood Bayesian...
We present a reference genome for the federally endangered Gaviota tarplant, Deinandra increscens subsp. villosa (Madiinae, Asteraceae), an annual herb endemic to Central California coast. Generating PacBio HiFi, Oxford Nanopore Technologies, and Dovetail Omni-C data, we assembled haploid consensus of 1.67 Gb as 28.7 K scaffolds with scaffold N50 74.9 Mb. annotated repeat content in 74.8% genome. Long terminal repeats (LTRs) covered 44.0% Copia families predominant at 22.9% followed by Gypsy...
PREMISE OF THE STUDY: American amphitropical disjunction (AAD) is an important but understudied New World biogeographic pattern in which related plants occur extratropical North America and South America, are absent the intervening tropics. Subtribe Amsinckiinae (Boraginaceae) one of richest groups displaying AAD pattern. Here, we infer a time‐calibrated molecular phylogeny group to evaluate number, timing, directionality events, yields generalizable insights into mechanism AAD. METHODS: We...
The California Phenology Thematic Collections Network (CAP TCN) is a collaborative project that seeks to maximize the value of herbarium specimens and their data, especially for understanding changes in plant phenology due anthropogenic climate change. unites personnel herbaria at universities, research stations, natural history museums, botanic gardens with goal capturing images, transcribing label producing georeferenced coordinates nearly one million preserved collected over past 150+...
Abstract We present a high-quality reference genome of the federally endangered Gaviota tarplant, Deinandra increscens subsp. villosa (Madiinae, Asteraceae), an annual herb endemic to Central California coast. Stewards remaining populations have planned apply conservation strategies informed by whole approaches. Generating PacBio Hifi, Oxford Nanopore Technologies, and Dovetail Omni-C data, we assembled 1.67 Gbp as 28.7 K scaffolds with scaffold N50 74.9 Mb. BUSCO completeness for final...
PREMISE OF THE STUDY: Hesperolinon (western flax; Linaceae) is endemic to the western United States, where it notable for its high and geographically concentrated species diversity on serpentine‐derived soils use as a model system in disease ecology. We used phylogenetic framework test long‐standing hypothesis that neoendemic radiation. METHODS: Five plastid two ribosomal nuclear DNA gene regions were sampled from 105 populations of , including all 13 recently recognized across their known...
Summary - Producing and maintaining flowers is essential for reproduction in most angiosperms, underpinning population persistence speciation. Although the physiological costs of often oppose pollinator selection, these have rarely been quantified. We measured a suite traits quantifying water carbon drought tolerance on leaves over 100 phylogenetically diverse species, including dry mass contents, minimum epidermal conductance to vapor ( g min ), vein density, per area. there was substantial...
Eriodictyon capitatum (Namaceae) is a narrowly distributed shrub endemic to western Santa Barbara County, where it known from only 10 extant California Natural Diversity Database element occurrences (EOs). Owing low numbers of plants in nature, limited overall extent, and multiple current threats, E. listed as Endangered under the Federal Species Act Rare Native Plant Protection Act. In present study, high-throughput DNA sequence data were analyzed investigate genetic diversity within among...
Calyptridium parryi var. martirense is described as new. Here we present quantitative measurements and statistical analyses of a number morphological features that demonstrate the distinctiveness this new taxon. The variety differs from others in having shorter fruits (3.1–4.1 mm) correspondingly smaller fruit length to sepal ratio (1.0–1.4). capsule also widest (1.4–2.2 sepals longest (2.4–3.9 any other C. variety. currently known only high elevation locations (1900–2630 m) Sierra de San...
For over a hundred years, botanists and biogeographers have noticed an interesting pattern: the occurrence of same plant species or very close relatives on either side tropics in North America (NA) South (SA) (Gray Hooker, 1880; Bray, 1898, 1900; Johnston, 1940; Constance, 1963; Raven, Cruden, 1966; Solbrig, 1972; Thorne, Carlquist, 1983; Wen Ickert-Bond, 2009). This biogeographic pattern, known as American amphitropical disjunction AAD (to be distinguished from European–African...
Cryptantha wigginsii I.M. Johnston (Boraginaceae) had previously been known from a single collection made in April 1931, at locality 18 miles south of Tijuana, Baja California, Mexico. This species is distinctive and unique the genus having nutlets with surface that smooth glossy near base densely tuberculate apex. Because absence subsequent collections, was presumed extinct. However, population C. recently discovered Carlsbad, San Diego Co., constituting new county, state, country plant...
Previous knowledge.Calyptridium pygmaeum is a seldom-collected annual plant in the Montiaceae, formerly Portulacaceae.With only 15 documented occurrences, this California endemic found primarily central and southern Sierra Nevada, although three occurrences are San Bernardino Mountains approximately 229 km to south.In latter region, C. was collected at Bear Lake 1886 ( Parish 1803), Bluff 1926 {Munz 10534), Arrastre Flat 1979 (Helmkamp & Helmkamp s.n.).Based upon history of collection, taxon...
Estuaries form a series of unique wetland habitats isolated from each other, often facilitating genetic divergence among populations. The estuarine seablite Suaeda esteroa Ferren & S.A.Whitmore (Suaedoideae; Chenopodiaceae) is common in northwestern Mexican estuaries, where the spatial isolation one another may promote diversification within this plant species. In study, we created novel nuclear ribosomal DNA genome skim dataset 30 S. herbarium specimens collected estuaries along coast to...
Dudleya chasmophyta S.McCabe sp. nov. es endémica de una pequeña porción del Cañón Santiago, en Orange County, California. Esta especie similar a la también rara D. cymosa subsp. ovatifolia (Britton) Moran, con que se ha confundido. difiere por tener brácteas inferiores no muy recurvadas, superficies abaxiales las hojas verde marrón-verdoso, pétalos extienden distalmente, garganta flores está constreñida o solo un poco, y los botones florales son más anchos parte media. A diferencia...
Branchinecta sandiegonensis is a passively dispersed species that occurs in the vernal pool complexes of southern California, USA, and northwestern Baja México. The fragmented distribution these could limit gene flow, generating high genetic structure morphometric variation across landscape. Here we estimate phenotypic B. part its range. We sampled 15 pools from four geographic regions California Peninsula. genotyped 150 individuals using nuclear microsatellites 31 mitochondrial COI region....
Tendon-to-bone repairs often fail when sutures pull through tendon, like a wire cheese. Repair strength is maximized loads are balanced equally among all sutures, relative to the pullout resistance of tendon and sutures. This problem balancing across multiple, discrete attachment sites has been solved in nature by hitchhiker plants that proliferate adhering relatively stiff fruit soft fur fabrics arrays hooks. We, therefore, studied fruits such plant, Harpagonella palmeri , developed shear...
The four species of Lennoaceae have strands primary plus secondary xylem in a background starch-rich parenchyma. These constitute cylinder with large rays. wood within these is markedly different from that other families the crown group Boraginales such as Cordiaceae and Ehretiaceae, most which are woody. differ because they lack fibrous cells (libriform fibers), rays vascular strands, elliptical vessel-to-vessel pits without vestures. short, wide vessel elements thick walls, horizontally...
Recent taxonomic treatments of the genus Harpagonella have included only one lower taxon, palmeri A. Gray. However, a larger-fruited variety from Arizona and Sonora was described by I.M. Johnston in 1924. He continued to recognize this taxon - var. arizonica his treatment Kearney Peebles's Flora 1960. Here, we provide two lines molecular evidence quantitative morphological calyx characters showing that plants Arizona, Sonora, central Baja California, corresponding Johnston's arizonica, are...
Calyptridium parryi (Montiaceae, formerly Portulacaceae) putatively comprises four varieties: arizonicum, hesseae, nevadense, and parryi. We performed a detailed phenetic analysis of seed, fruit, sepal morphology in order to assess the distinction rank these varieties. treated San Pedro Martir Mountains, Baja California populations C. as separate taxonomic unit studies, given their great disjunct distribution. In addition, we included very similar largely sympatric monandrum analyses....