Data in supplement for a research project exploring the potential effects of trait plasticity and maternal effects on a rare (Lupinus nipomensis) and common (Lupinus bicolor) annual lupine species. The seeds were collected by hand between 2016-12-01 and 2017-02-28 near UC Santa Barbara Greenhouses. Plants were grown in an initial cohort experiencing both well-watered and drought dry-down conditions at an average temperature of 21.1°C – 22.2°C. Seeds were then harvested to be grown in a F1 generation to test for the relative effect of maternal effect and trait plasticity. The study took place in greenhouses at the University of California Santa Barbara from 2016 - 2017. Different measures include vegetative traits, phenological events and reproductive traits.