Large-scale ecological restoration efforts increasingly require large quantities of genetically diverse seeds adapted to a range of potential sites. To meet this demand, there is a growing emphasis on mixing multiple, regionally sourced source populations in production settings to produce large quantities of genetically diverse seeds. However, because few empirical studies are available, it is unclear how source population representation and genetic diversity shift through production and restoration use of mixed-source seed lots. We used neutral genetic markers and assays of variation in seed germination requirements to investigate how genetic diversity and source population representation shift following the use of a mixed-source seed lot to establish a seed production field and 10 restoration sites. Our mixed-source seed lot contained 19 source populations of the perennial forb, Penstemon pachyphyllus, from six mountain ranges in the Great Basin, U.S.A. We found that, while populations from all six mountain ranges used in the mixed-source seed lot were present in production and restoration sites, representation of each source mountain range shifted unpredictably. Populations from one mountain range were particularly overrepresented at the production site relative to its composition in the original seed mix. We also found that, despite using the same mixed-source seed lot for production and restoration sites, resulting source population composition varied greatly, suggesting that local conditions favored some populations over others. Significant among-population variation in seed germination requirements may, in part, explain shifts in source population representation in the production and restoration sites.

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First emerging at the end of the 20th century, community science (a.k.a. citizen science), utilizing volunteers and volunteer-contributed data, has become a major component of biological conservation worldwide. Interacting factors including limited funding, technology availability, and public interest present a unique opportunity for conservation scientists and practitioners to benefit from larger datasets with broader spatial and temporal reach than possible from professional researchers alone. In tandem with benefits to science, volunteers gain hands-on research experience, scientific knowledge, outdoor opportunities, and community. However, this approach is far from universally adopted, as some researchers question the accuracy and value of community science data and entrusting volunteers with sensitive data, such as rare plant locations. We assessed community science projects that conduct rare plant monitoring to examine the value of community science in plant conservation. We identified projects through research and targeted outreach. Through digital surveys of project managers and volunteers, we collected qualitative and quantitative data addressing the efficacy of projects in regard to a number of predictor variables (e.g., staffing, funding, program size, data management, volunteer training, and demographics) and metrics of success (e.g., number of volunteers engaged, monitoring assignments, and publications). We reported the qualities of successful plant conservation community science projects to encourage the establishment of new projects, the improvement of existing ones, and the maximum application of volunteer-contributed rare plant monitoring datasets. We propose the establishment of a community science rare plant monitoring network to facilitate sharing ideas, strategies, and tools for project success.