Sedum lanceolatum aka Spearleaf Stonecrop

Sedum lanceolatum belongs to Crassulaceae, the stonecrop family. This evergreen perennial lives for years and keeps its leaves. People call it spearleaf stonecrop or subalpine stonecrop. It comes from western North America. Its range runs from Alaska into the western and west-central United States. It also grows in Yukon and Alberta in Canada. It grows on rocks and gravel in open, exposed sites. These sites range from sea level to the subalpine zone, below the tree line. Kew also links it to subalpine or subarctic climates.

This small plant reaches about 0.7 feet [0.2 metres] tall. It keeps its leaves all year and does not creep. Plants within the species can differ a great deal in form. Yellow flowers appear from July to August. Each flower has both male and female organs. Insects pollinate the flowers. Plants can also set seed through self-fertilisation, using their own pollen. Seeds ripen from August to September, after the summer bloom.

In gardens, give it sun and soil that drains well. Plants For A Future says it cannot grow in shade. It accepts sand, loam, and clay if the soil drains well. It prefers rich soil but grows in most soils. It can grow in slightly acid or slightly alkaline soil. Neutral soil suits it too. The soil may be dry or moist. Plants withstand drought once they have settled in. They cope with strong winds, but not sea winds. PFAF lists USDA zones 5–9. It also lists hardiness to at least 5°F [−15°C].

Its small size suits beds, and it can grow on walls. PFAF lists walls that face east, south, or west. Grow new plants from seed or split existing plants. Sow seeds on the soil surface in spring under glass. Give them sun and soil that drains well. Do not let the seedbed dry out. Move seedlings into their own pots when large enough to handle. Those that grow slowly may need shelter through their first winter. Split plants during the growing season. Spring or early summer is best.

You can eat the leaves raw or cooked. Use care with food use: large portions can upset the stomach. PFAF gives the plant a low rating for use as food. It records past use as a laxative, to help pass stools. It also records an infusion, a steeped drink, taken after childbirth. These are past uses, not proven treatments. PFAF reports no weed potential for this species.