Lupinus — 16 species

Lupinus is a diverse genus of annual and perennial flowering plants, from the sprawling Texas Bluebonnet (L. texensis) and Arroyo Lupine (L. succulentus) to the stately perennial Russell hybrids. They perform best in full sun with at least six hours of direct light and thrive in loose, well-drained, slightly acidic soil; once established, most species are drought tolerant and require little supplemental watering. Lupines fix atmospheric nitrogen, benefiting surrounding plants. All Lupinus species are toxic to cats and dogs — alkaloids including lupinine and sparteine can cause vomiting, tremors, and respiratory distress.