Sedella pentandra, commonly known as Mt. Hamilton mock stonecrop, is an annual succulent herb native to the rocky outcrops and serpentine soils of the Central Coast Ranges, as well as some areas of the Central Valley and the California coastline. It is a diminutive plant, rarely exceeding 3 inches in height, with small, fleshy leaves and clusters of tiny, star-shaped flowers with yellowish petals that bloom in the spring. The plant’s low stature and modest flower display make it less conspicuous, yet it adds a unique texture and interest to rock gardens and alpine collections.

Mt. Hamilton mock stonecrop thrives in well-drained, rocky or sandy soils, typically those derived from sandstone or serpentine. It is drought-tolerant, requiring minimal water once established, and prefers full sun to partial shade. In cultivation, it is valued for its adaptability to challenging soil conditions and its ability to fill crevices in rock walls or garden paths. While not widely used, it can serve as a ground cover in xeriscapes or native plant gardens. Its succulent nature makes it resistant to many pests, but it can be sensitive to overwatering and root rot.CC BY-SA 4.0