August 2015 – Present
State College, PA

Graduate Assistant

Pennsylvania State University

Recent Publications

Intraspecific diversity arises from genetic and plastic responses to the environment. Immense natural history collections allow …

Background The presence of non-coding introns is a characteristic feature of most eukaryotic genes. While the size of the introns, …




Molecular Biology

Growing Plants

Recent & Upcoming Talks

A talk given at Evolution 2019 about natural variation in Arabidopsis phenology.




Work comparing Arabidopsis phenology in the lab to herbarium collections.

Phenotypic Change Documented in Herbaria Records

Modeling change in phenotype across time and space using Arabidopsis herbaria records.


Making plant biology and ecology accessible and enjoyable for the wider public is an important goal of my work. Some of my outreach efforts:

  • Pennsylvania Summer Academy for the Blind STEM Extension Weekend
  • Discovery Space floor volunteer
  • A Knitted History of Plant Evolution


I have served as a teaching assistant for the following courses at Penn State:

  • BIOL 110L: Basic Concepts and Biodiversity laboratory
  • BIOL 240W: Organismal Biology laboratory


  • vldeleo@psu.edu
  • 405d Life Sciences Building Pennsylvania State University 16802