Our group includes undergraduate and graduate students who seek a deeper understanding of plant biology and work to develop expertise in scientific research and the dissemination of its results. We study the plant fossil record and developmental anatomy to understand the evolution of plant form, patterns of plant diversity through time and plant phylogeny.
We study the plant fossil record and developmental anatomy to understand the evolution of plant form, patterns of plant diversity through time and plant phylogeny.
Fossil studies investigate the Late Ordovician – Silurian terrestrial biotas and land plant evolution, Early Devonian floras and their bearing on bryophyte and vascular plant evolution, and plant diversity in the floras of the Early Permian and Early Cretaceous.
Studies of extant plants address the evolution of vascular architecture, roots, and the layers marking the boundary between vascular and ground tissues.
As the first stage of the ‘Devonian Explosion’, the Early Devonian witnessed the early phases in the evolutionary radiation of vascular plants. Because of that, Early Devonian floras are key to understanding the origins and phylogeny of major tracheophyte lineages and, more generally, deep plant phylogeny.
Research focuses on two North American floras:
The Beartooth Butte Formation of Wyoming hosts the only extensive Early Devonian flora known in western North America, which includes zosterophylls, early lycopsids and trimerophytes of Lochkovian – Emsian age (415-395 Ma) preserved as compressions; bryophyte- and protracheophyte-grade plants are also present, along with algae and animals (microconchids, eurypterids and fish). Work in the Beartooth Butte Formation is aimed at a monographic treatment of the flora (taxonomy, systematics) and understanding of the sedimentology and depositional environments of the fossiliferous layers. The abundant lycophyte material is studied for whole-plant reconstructions, whereas in situ preserved plants provide insights into the three-dimensional architecture of the earliest rooting systems. Field trips for fossil collecting are organized about every other year.
The Battery Point Formation and coeval units in the Gaspe Peninsula of Quebec and in New Brunswick host an Emsian (407-395 Ma) flora representing one of the rare occurrences of anatomically preserved plants in the Early Devonian. We study Gaspe specimens on loan from the National Museum of Natural History – Smithsonian Institution, to characterize the sporangia and spores of the best known trimerophyte, Psilophyton, as well as to document plant diversity in the flora (including some of the oldest occurrences of secondary growth/wood production) and to provide whole-plant reconstructions.
I use this phrase loosely, to refer to studies of fossils other than vascular plants: bryophytes, as well as fungi, lichens, algae and prokaryotes. The fossil record of these groups is much sparser than that of vascular plants, so work aimed at detailed characterization and taxonomic placement of new fossils is important for closing the gap. We described Early Silurian (Llandovery, ca. 440 Ma) cyanobacterial colonies with associated bacteria from terrestrial biotas of the Massanutten Sandstone in Virginia. Work in the lab currently focuses mainly on Early Devonian and Early Cretaceous material.
In the Early Devonian Beartooth Butte Formation of Wyoming we are characterizing Lochkovian – Pragian (ca. 411 Ma) thalloid compression fossils that could be among the oldest thalloid liverworts. The Beartooth Butte Formation also hosts, in Emsian layers (407-395 Ma), Sphondylophyton, a fossil we recently reinterpreted as a red alga.
Many projects in the lab concentrate on Eocene (ca. 45 Ma) and Early Cretaceous (Valanginian, ca. 136 Ma) material from Vancouver Island (British Columbia), as part of a collaboration with Gar Rothwell and Ruth Stockey’s lab at Oregon State University. This material shows exquisite cellular preservation and has yielded diaporthalean perithecial ascomycetes and chlorolichens. More important, the Early Cretaceous of Vancouver Island hosts the most diverse fossil bryophyte flora worldwide, which we are currently characterizing.
Recent exploration of another Early Cretaceous unit from the western coast of North America, the Budden Canyon Formation of California, has revealed a richness of anatomically preserved fossil bryophytes matching that of the slightly older Vancouver Island material. Studies of this flora are also underway.
Fossil assemblages representing terrestrial communities of thalloid organisms similar to modern biological soil crusts span the Late Ordovician through Late Silurian (450-425 Ma) and are scattered throughout the Appalachian Basin (notably Virginia, West Virginia, Maryland, Pennsylvania, New York). These assemblages, younger than the earliest land plant spores but pre-dating the oldest known vascular plants, are important in the search for the oldest land plants.
Just like modern biological soil crusts, the Appalachian pre-tracheophyte communities were associations of different types of organisms, as demonstrated by: (1) diverse types of internal organization seen in individual thalloid fossils from the Early Silurian (Llandovery, ca. 440 Ma) Massanutten Sandstone of Virginia; (2) experiments that simulate fossilization on modern thalloid organisms producing structures similar to those of the Appalachian fossils in algae, fungi, lichens and bryophytes; (3) colonies of filamentous cyanobacteria we described in the Massanutten Sandstone; and (4) stable carbon isotope ratios that support terrestrial origin of the fossils and suggest that some of these were liverworts.
Current efforts focus on a Late Ordovician (Katian, ca. 450 Ma) sequence at Conococheague Mountain, in Pennsylvania, to refine a method for distinguishing between nearshore marine and continental deposits based on carbon and sulfur chemistry.
I am interested in the evolution of the basic features of the sporophyte body plan: indeterminate growth and branching, leaves, roots, radial patterning of tissues/boundary layers, vascular architecture. We approach questions in this area from two angles: the fossil record and the evolution of development as reflected by comparative anatomy.
The lycopsid material in the Early Devonian (Lochkovian – Pragian, ca. 411 Ma) Beartooth Butte Formation of Wyoming represents one of the oldest plants with leaves and roots. Ongoing work on this plant is aimed at documenting in detail the rooting structures and whole-plant reconstruction. This work is combined with studies of rooting structures preserved in growth position, which provide insights into the three-dimensional architecture and growth patterns of the earliest rooting systems.
Boundary layers form a sleeve of tissue continuous throughout the plant body, which separates vascular tissues from ground tissues. The endodermis, starch sheath and leaf vein bundle sheaths are different expressions of this boundary domain; in seed plants their specification seems to be controlled by a common regulatory mechanism. Considerably less is known about the development and specification of boundary layers outside the seed plants. We characterize the patterns of cell division leading to development of the endodermis and compare them across tracheophyte lineages, seeking a better understanding of the evolution of the stem-leaf-root body plan.
The architecture of mature vascular tissues is determined by the development and architecture of the procambium in the apical meristems. Ongoing work is aimed at characterizing procambial architecture in different tracheophyte lineages, in search of shared patterns and phylogenetic signals, and to gain a clearer understanding of the evolution of steles and the stem-leaf-root body plan.
The exquisite permineralized floras of the Early Cretaceous and Eocene of Vancouver Island have counterparts in California. We are working in the Early Cretaceous (Barremian-Aptian, ca. 125 Ma) Budden Canyon Formation of northern California to document a rich permineralized flora. To date, we have identified pinaceous and cupressaceous conifers, ferns and bryophytes, and studies are underway to characterize in detail several of these plants. Additional field collecting is bound to reveal more diversity.
Argentinian Patagonia is host to numerous fossil floras covering a very broad stratigraphic range. We are collaborating with scientists at Museo Paleontologico Egidio Feruglio in Trelew to characterize plants in several of these floras. Ongoing studies focus on ferns, sphenopsids and arborescent lycopsids of the Early Permian (ca. 290 Ma) Rio Genoa Formation, as well as Jurassic and Eocene ferns (dipterids) and bryophytes.
Drinks coffee, tea and yerba mate all day and keeps the lab running
mihai@humboldt.edu
Research interests: Phylogenetic relationships of early tracheophytes; fossil mosses and thalloid gametophytes; fossil evidence of early life; diversity of the Early Cretaceous bryoflora of Vancouver Island (Canada); fern leaf development; playing a diveristy of musical instruments...
alexbippus@gmail.com
Research interests: Early Devonian permineralized floras - cladoxylopsids
Jessica.Chu@humboldt.edu
Research interests: The seed cones of Cupressaceae - anatomy and morphology
ashley.kammet@humboldt.edu
Research interests: Early Devonian permineralized floras - progymnosperms
selin.toledo@humboldt.edu
Research interests: Bryophytes - systematics and fossil record
adolfinasavoretti@gmail.com
Research interests: Hydropteridalean ferns - Marsileaceae: fossil and extant
sja255@humboldt.edu
Research interests: Early Devonian permineralized floras - euphyllophytes
mab1084@humboldt.edu
Research interests: Devonian microconchid encrusters
snd208@humboldt.edu
Research interests: Histological microtechnique, anatomy, Cupressaceae seed cones
sre127@humboldt.edu
Research interests: Early Devonian permineralized floras - woody plants
crh433@humboldt.edu
Research interests: Early Devonian permineralized floras - woody plants & rhyniophytes
kcp2760@humboldt.edu
jab171@humboldt.edu
PhD student at the Richard Gilder Graduate School, American Museum of Natural History
abronson@amnh.org
jkb56@humboldt.edu
jac112@humboldt.edu
PhD student at the University of California - Davis, Department of Plant Sciences, in Maciej Zwieniecki's lab
alanaroseo@gmail.com
MSc student at San Francisco State University, Department of Biology, soon to enter the PhD program in Biological Sciences at the University of Pittsburgh
ncullen@mail.sfsu.edu
madattola@yahoo.com
Consultant biologist/environmental engineer – CalTrans
erf104@humboldt.edu
Forestry and Fire Ecologist – Kalispel Natural Resources Department
lucas.t.henderson@gmail.com
Entering the PhD program in Plant Breeding and Genetics at Oregon State University
lhoffman@humboldt.edu
Watershed Steward / Americorps – California Department of Fish & Wildlife
krl211@humboldt.edu
PhD student at the University of Michigan, Department of Earth & Environmental Sciences, in Selena Smith's lab
matsunagakelly@gmail.com
P G & E
shaunarmcdonald@gmail.com
Working toward a teaching credential
hcn25@humboldt.edu
ao121@humboldt.edu
PhD student at Cornell University, School of Integrative Plant Science
arp275@cornell.edu
gws15@humboldt.edu
PhD student at the University of Colorado, Department of Ecology and Evolutionary Biology
christopher.steenbock@gmail.com
PhD student at the University of Florida, School of Natural Resources and Environment
r.winslow.tate@gmail.com
USDA - forest ecology
cru10@humboldt.edu
Dennis K. Walker AwardHumboldt State University, Dept. of Biological Sciences
Kelly Pfeiler
Patricia O. McConkey Outstanding Graduate Student AwardHumboldt State University
Alexander Bippus
GSA Research AwardGeological Society of America
Selin Toledo
Maynard Moseley AwardBest student paperBotanical Society of America, Paleobotanical and Developmental & Structural Sections
Maya Bickner
Kenneth E. & Annie Caster Student Research AwardPaleontological Society
Kelly Pfeiler & Shayda Abidi
Mid-American Paleontology Society Outstanding Student Research AwardPaleontological Society
Crystal Hofer
BSA Undergraduate Research AwardBotanical Society of America
Kelly Pfeiler
IAPT Research AwardInternational Association of Plant Taxonomists
Adolfina Savoretti
Rumble Botany AwardHumboldt State University, Dept. of Biological Sciences
Selin Toledo
Dennis K. Walker AwardHumboldt State University, Dept. of Biological Sciences
Alaina Petlewski
Graduate Research FellowshipNational Science Foundation
Alexander Bippus
Maynard Moseley AwardBest student paperBotanical Society of America, Paleobotanical and Developmental & Structural Sections
Alexander Bippus
Alistair & Judith McCrone Graduate FellowshipHumboldt State University
Alexander Bippus
Graduate Student Research AwardBotanical Society of America
Adolfina Savoretti & Alexander Bippus
Stephen J. Gould Student Research AwardPaleontological Society
Selin Toledo
Kenneth E. & Annie Caster Student Research AwardPaleontological Society
Adolfina Savoretti
G. Arthur Cooper Student Research AwardPaleontological Society
Alexander Bippus
GSA Research AwardGeological Society of America
Selin Toledo
ASPT Research AwardAmerican Society of Plant Taxonomists
Adolfina Savoretti
Gregory M. Jennings Graduate Botany AwardHumboldt State University, Dept. of Biological Sciences
Alexander Bippus
Dennis K. Walker AwardHumboldt State University, Dept. of Biological Sciences
Emma Fryer
F.R. Meredith Botany ScholarshipHumboldt State University, Dept. of Biological Sciences
Alaina Petlewski
Sterling Sam AwardHumboldt State University, Dept. of Biological Sciences
Kara Frampton
GSA Research AwardGeological Society of America
Jessica Chu
Patricia O. McConkey Outstanding Graduate Student AwardHumboldt State University
Kelly Matsunaga
BSA Undergraduate Research AwardBotanical Society of America
Alexander Bippus
Young Botanist AwardBotanical Society of America
Kolby Lundgren & Christa Unger
Vernon I Cheadle Travel AwardBotanical Society of America
Jessica Chu
Rumble Botany AwardHumboldt State University, Dept. of Biological Sciences
Kelly Matsunaga
Dennis K Walker AwardHumboldt State University, Dept. of Biological Sciences
Kolby Lundgren
F.R. Meredith Botany ScholarshipHumboldt State University, Dept. of Biological Sciences
Kelly Pfeiler
Sterling Sam AwardHumboldt State University, Dept. of Biological Sciences
Ashley Ortiz
Isabel Cookson AwardBest student paperBotanical Society of America, Paleobotanical Section
Kelly Matsunaga
GSA Research AwardGeological Society of America
Kelly Matsunaga
James M. and Thomas J.M. Schopf Student Research AwardPaleontological Society
Kelly Matsunaga
Young Botanist AwardBotanical Society of America
Allison Bronson & Jamie Burnett
F.R. Meredith Botany ScholarshipHumboldt State University, Dept. of Biological Sciences
Alexander Bippus
University of ChicagoNSF Reserch Experience for Undergraduates (Malamy Lab)
Alexander Bippus
Alaska SeaLife Center InternshipSeward, Alaska
Nevin Cullen
Graduate Student Research AwardBotanical Society of America
Kelly Matsunaga
Young Botanist AwardBotanical Society of America
Laurel Hoffman
Vernon I. Cheadle Travel AwardBotanical Society of America
Kelly Matsunaga
American Musuem of Natural HistoryNSF Reserch Experience for Undergraduates (Maisey Lab)
Allison Bronson
Academic Excellence and Achievement AwardCollege of Natural Resources and Sciences, Humboldt State University
Christopher Steenbock
Academic Excellence and Achievement AwardBest Undergraduate Research Project, Humboldt State University
Alexander Bippus & Maria Friedman
Academic Excellence and Achievement AwardBest Professional Publication, Humboldt State University
Allison Bronson
Academic Excellence and Achievement AwardBest Professional Presentation, Humboldt State University
Christa Unger
Gregory M. Jennings Graduate Botany AwardHumboldt State University, Dept. of Biological Sciences
Kelly Matsunaga & Glenn Shelton
Dennis K. Walker AwardHumboldt State University, Dept. of Biological Sciences
Christopher Steenbock
Sterling Sam AwardHumboldt State University, Dept. of Biological Sciences
Christa Unger
Maynard Moseley AwardBest student paperBotanical Society of America, Paleobotanical and Developmental & Structural Sections
Alexander Bippus and Maria Friedman
Young Botanist AwardBotanical Society of America
Kelly Matsunaga, Glenn Shelton, and Christopher Steenbock
Academic Excellence and Achievement AwardBest undergraduate research project, Humboldt State University
Kelly Matsunaga
Vernon I. Cheadle Travel AwardBotanical Society of America
Allison Bronson
Sterling Sam AwardHumboldt State University, Dept. of Biological Sciences
Christopher Steenbock
Academic Excellence and Achievement AwardBest professional publication, Humboldt State University
Christopher Steenbock
Triarch Botanical Images Travel AwardFirst Place, Botanical Society of America
Glenn Shelton
Developmental & Structural Section Travel Award Botanical Society of America
Kelly Matsunaga
Young Botanist AwardBotanical Society of America
Lucas Henderson
Eureka Sequoia Garden Club AwardPromising Botany Student
Christopher Steenbock
Katherine Esau AwardBest student paperBotanical Society of America, Developmental & Structural Section
Alana Chin (Oldham)
Young Botanist AwardBotanical Society of America
Shauna McDonald
Young Botanist AwardBotanical Society of America
Richard Tate
Young Botanist AwardBotanical Society of America
Alana Chin
Structure, function, reproduction, ecology, interactions and phylogenetic relationships of plant, fungal and protist groups.
Plant structure and development – descriptive anatomy and molecular mechanisms; emphasis on seed plants and angiosperms.
Organismal biology, phylogeny and evolution of vascular plants; phylogenetics – theory and applications.
Fossil record of plant, fungal and protist groups; fossil formation, chronostratigraphy and implications for evolution and phylogeny; lab techniques.
Scientific research is a way of life, not a job (although the luckier of us get paid to do it). It may or may not be your way of life and that’s just fine, either way. If it is, it will always bring excitement, novelty and accomplishment in your life (although data collecting is admittedly often monotonous and sometimes tedious) and will keep you happy. If it isn’t your way of life, it will just seem tedious and dreary and you should look for something better to do that will make you happy.
Graduate and undergraduate students are conducting research in my lab. Many of these students present their results at national and international meetings and quite a few have published in journals such as the American Journal of Botany and the International Journal of Plant Sciences.
Projects usually involve anatomic and morphological characterization of fossil and extant plants; comparative morphology, anatomy and development; extensive surveys of the primary literature on plant anatomy, morphology, systematics, and fossil record; taxonomic treatments. Sometimes we organize field trips to collect fossils.
Students learn and employ techniques for processing fossil plant material (cellulose acetate peel technique, rock thin sectioning, degagement), as well as fresh material (microtechnique – paraffin embedding, microtome sectioning, staining); digital image capture and processing; morphometric measurements. They also pick up bits and pieces of geology (petrology, sedimentology, stratigraphy) and phylogenetics. Some use electron microscopy, some run exhaustive searches of the literature (online databases) on selected topics, and all students read a lot.
Many undergraduate students approach me about working on projects with me to build some research experience. If you are one of those students, please consider the following:
This is volunteer work. If you do it well and enough, it may earn you a strong letter of recommendation (for internships, graduate schools, awards, etc.), a line to strengthen your resume/curriculum vitae, and even the opportunity to give a presentation at a science meeting or a publication.
Look at the lab’s research page to see if you are interested in the research directions that we are addressing.
Your major, academic level or GPA matter less. What matters much more is your level of interest and commitment.
If you are unable to commit at least 2-3 hours per week to a research project on a consistent basis (that is, irrespective of exams, homework etc.), the effort is not worth your time (nor mine) since it won’t gather the momentum needed to produce meaningful data and results.
Willingness to learn, attention to detail, good organizational skills and reliability are essential requisites; additionally, a certain level of obsessive compulsion has never hurt anybody doing research. Conversely, lack of organization or attention to detail sooner or later lead to loss of painstakingly acquired data or destruction of unique research specimens and are unwelcome.
Serious research requires more than going through the moves of working with specimens and acquiring the raw data (a lab technician can do that). It requires thinking and reading on your own about your project, asking yourself and others questions about it, in short, making it a part (and an important one at that!) of your intellectual life.
This brings me to my view of undergraduate research:
I will gladly address inquiries into the possibility of conducting graduate studies under my direction. If you are a prospective graduate student, please consider the following:
Our program only offers the Master of Science/Master of Arts options.
You should contact the head of the graduate program for our department, Dr. Erik Jules, and the graduate coordinator, Ms. Elizabeth Weaver, to get information about the workings of the program, financial and other.
I usually draw graduate thesis projects from work that is developing the different directions of my research program. I am, nevertheless, open to the prospective graduate student’s original ideas as long as the research involved falls within the realm of my expertise.
I expect a few things from graduate students. In no particular order, these are:
To be curious, self-motivated and quickly become independent workers who actively seek my advice (as opposed to lab dwellers waiting for orders).
To have good organizational skills and excellent attention to detail; these are crucial in successfully addressing the tedium of data collection and management, as well as in presenting the results of research, orally or in writing.
To be or become well-trained in plant organismal biology, morphology, anatomy, development, and the fossil record.
To be proficient at searching the literature (available online or otherwise) and building comprehensive summaries of research findings and state-of-the-art knowledge in their particular direction of investigation and closely related fields.
Web design: C. M. Steenbock
Last updated: 5 April 2018