Assistant Professor at Oregon State University Botany and Plant Pathology. systematics, speciation, hybridization in flowering plants. Natural history via community science. Birder, Arkansan, he/him
Major #Botany2026 FOMO, but the drive MA->OR starts this week. So, sharing from afar: I’m recruiting grad students for my new lab at OSU! Info: www.mckenzie-lab.org . We're going to have FUN with systematics, speciation genomics, methods, natural history, and more in North Am angiosperms. Reach out!
excited to share a new preprint! We can describe the expected spectrum of genotype configuration counts under a given population selfing rate from Nordborg and Donnelly's partial-selfing model. Think SFS.... but including information about pairing within diploids: www.biorxiv.org/content/10.6...
This spectrum can be constructed from pretty much any population dataset of putatively unlinked SNPs. We think this flexibility will make the estimator convenient for surveying selfing rates across broad groups of diploid taxa (and seems extendable to other ploidies...)
we still want to work in more analysis before putting this in for peer review but wanted to go ahead and get the idea out there. I (and my -incredible- collaborators Felix and Robin) would be very happy to get feedback if you have it
BPP is hiring! come join us in @osubpp.bsky.social
The Department of Botany & Plant Pathology invites applications for a 12-month (0.75 FTE), tenure-track Assistant Professor position in extension plant pathology.
more at link below:
oregonstate.wd501.myworkdayjobs.com/OSU_Careers_...
🌿 Congratulations to Dr. Jenn Coughlan (Yale University), recipient of the 2026 BSA Emerging Leader Award! We're honored to recognize them as a rising star in our community. 👏
Learn more at www.botany.org (click Awards).
#BSA2026AwardsBlitz#IamaBotanist#PlantPeopleFTW
I’m excited to announce that we are looking for a Curatorial Associate to join our team and help lead the L. H. Bailey Hortorium Herbarium at Cornell University 🌿 Please help share with interested botanists!
jobs.hr.cornell.edu/us/en/job/WD...
New work out, and so happy to have it in a journal with wide, interdisciplinary readship!
I just presented on this at #Botany2026 and look forward to continuing research with this * very pretty * pathosystem in the coming years! I'm recruiting grad students for Fall 2027; be in touch!
From settler gardens to digital naturalists: human aesthetic preferences and land use changes facilitate the biogeographical expansion of a wild plant–virus interaction
📖 nph.onlinelibrary.wiley.com/doi/10.1002/...
by Lombardi et al.
@emlombardi.bsky.social
Image credit: Mia Brown-Seguin
Ok, BSA’s socials game is 🔥🔥🔥 I’m having huge FOMO missing out this year (life stuff, sigh), but I’m OVERJOYED to see the final face on this preview is former Coughlan lab undergrad- Quinn Evans- AND we just posted his honors thesis to BioRxiv earlier this week! Go Quinn, go!!!!! 🤩🤩🤩🤩🤩
We had to show you some more presentations from last night's poster session, but we're still sad we can't highlight them all! Be sure to stop by the #Botany2026 Exhibit Hall to check them out.
Follow along all week for updates from the conference 🌿
#plantpeopleFTW
Big #Botany2026 Monday for the lab: great posters by @botanicalbecks.bsky.social and Maria Aguilar (her 1st!) and awesome talk by new Burpee postdoc @devanijolman.bsky.social on her PhD work at ODU. #plantpeopleFTW
I'm looking for PhD student to join my lab at the University of Arkansas at Little Rock (Fall 2027)! If you're interested in evolutionary genomics, conservation genetics, or biogeography, please reach out.
I'll also be at #AOS2026 this week talking about sexual selection in small populations.
Are you passionate about #naturalhistory#collections? Apply for our open position for the Herbarium Collections Manager @utkherbarium.bsky.social. We will start evaluating applications on Aug 17, so get your application in now. #Botany2026#herbarium#jobs
So proud of this manuscript- lead by the fantastic @henryarenas.bsky.social with two undergraduates (Cage Cochran and Quinn Evans) each doing a Herculean effort during their honors theses, and Hongfei Chen helping out tremendously with lab work.
www.biorxiv.org/content/10.6...
Excited to share some positive updates: I successfully defended my dissertation, and have accepted a postdoctoral position starting this fall at University of Rochester. I'll be working with Mark Hibbins (@rejectresubmit.bsky.social).
A big thank you to everyone who has helped me on this journey!
#RADCamp Latin America 2026 was a great success! Big thanks to our sponsors, instructors, and participants. 16 participants came from all over Latin America to learn and generate RADseq data on their own samples, and to perform analyses using ipyrad2! radcamp.github.io/LatinAmerica...
Avocados come in 2 varieties - A-types start each day female and switch to male midday. B-types do the reverse. In work just published from the last chapter of my PhD, we show this system evolved 40+million yrs ago and is regulated by alleles of 1 transcription factor
www.pnas.org/doi/10.1073/...
"Three roles for background natural history in Ecology & Evolutionary Biology: (1) as spark (motivating research questions and hypothesis), (2) as scaffold (supporting the conduct of studies), and (3) as substrate (serving as raw material for new research)."
www.journals.uchicago.edu/doi/10.1086/...
Short but awesome trip to Mexico with a great team. Also, success: finding Monarda pringlei! It’s one of two red Monarda species (the other being the Appalachian species M didyma) and it is confined just to a tiny area in the mountains above Monterrey
I’m starting at Oregon State University this September as Herbarium Director and Assistant Professor in the Department of Botany and Plant Pathology. An absolute dream job and I am so grateful!
Looking to grow the lab soon and will update here. In the meantime please don’t hesitate to reach out!
Excited to share that I will be joining Florida State University as an Assistant Professor starting in January 2027!
I’m thrilled to build my lab at FSU in the Ecology & Evolution Division within the Department of Biological Science — stay tuned!
A huge thank you to my village for all the support!
Thrilled that our new review article on animal hybridization is now up on EcoEvoRxiv! 🎉 Working on this review with @mollyschumer.bsky.social was a blast, and it was such a wonderful opportunity to catch up on all the amazing work in animal hybridization over the last few years!
Excited to share this new pre-print from the fantastic @kelsiehunnicutt.bsky.social! Kelsie put together a thoughtful and thorough review on hybridization in animal evolution: ecoevorxiv.org/repository/v.... She tracks notable shifts in perspectives on the study of hybridization through time.
So cool to see our work highlighted here! Thanks @botany.one ! And, re: the question “were you one of the observers in our dataset,” besides in the paper supplement, there’s a full list of them here: github.com/pmckenz1/mon...
How Thousands of Phone Snapshots Solved a Flower Colour Mystery
www.botany.one/how-thousand...
Nearly 10,000 People Helped Confirm a Botanical Hunch. Were You One of Them?
#Botany#PlantScience
The United States National Herbarium is seeking a Lead Collections Manager! For complete requirements and application procedures, please visit USAJOBS (www.usajobs.gov/job/864499200). Applications and all supporting documentation must be received online by 1 May 2026.
We had fun partnering with the Oregon Stater magazine to share a little bit about Mycology at OSU!! Each fall our Mycology class has a fantastic time collecting and identifying fungi on our field trips 🍄 🍄 🍄
Herbarium Sheets Are Holding Secrets Their Makers Never Intended
www.botany.one/herbarium-sh...
When you mount a plant on a sheet, you capture more than botany. A new paper reveals the unexpected historical treasures hiding in herbaria, and why closing them is a mistake.
#Botany#PlantScience
My PhD paper on my beloved cycads and beetles on the cover of Science!!!
Check out how we studied thermal infrared as a pollination signal, from molecular mechanisms to the wonders of behavior...
science.org/doi/10.1126/...
Our greenhouse lights/fixtures need to be replaced. What light systems are newer university/commercial greenhouses using these days? Are we shifting to LEDs and away from high pressure sodium?
Spun off a lightweight python package “pedigraph-sim” for simulating meiosis on arbitrary pedigrees. It tracks how crossing over produces segments of local ancestry and contains convenience functions like exporting the tree sequence to tskit for analysis: github.com/pmckenz1/ped...
To me it pretty often feels tough to link patterns in coalescent-with-recombination tree sequences back to the mechanistic/biological process of crossing over. Made pedigraph-sim specifically to help make the relationship between meiotic recombination and the “tree sequence” super transparent
It works at super small scales - e.g. 10 diploids for 100 gens. This is the first pass, so still a bit clunky and feature-limited. I’m planning to incorporate polyploidy, interference, other map functions, etc and eventually improve performance
Only two more days to submit abstracts for the Bay Area PopGen conference! Registration still open for the low low price of $0. bapg-conference.github.io
map of overall (radial) avg flowering day across all species, made using PhenoVision-labeled iNat data. Trying to figure out if I should be surprised by this or questioning my data analysis... is the late flowering in the west Sierra Madre well known? Fwiw, corresponds to rainy season there.
the "lost" species Monarda mexicana is still out there! Known from just 2 historical collections (most recent from the 1950s). Imagine my joy in stumbling on a picture of it on @inaturalist.bsky.social !!! We've now documented the first known modern populations and revived the species name:
this one started from my living room with an 11:02pm email to colleagues of basically “check out this weird observation” and turned into a super rewarding international collaboration
Pediatric TGCT is ultrarare, and this study represents the largest analysis to date of 121 peds pts and a comparison to adult TGCT. It’s a meaningful milestone for me as a researcher and former peds pts.
📖 doi.org/10.1186/s13023-026-04231-7