Sedum acre is a perennial herb, creeping, evergreen, mat-forming.
Leaves very small, to 0.6 cm, closely overlapping, thick fleshy, pale, usually whitish-green, oval, blunt.
Flowers yellow, star-shaped, petals to 1 cm long, narrow, in small clusters at ends of stems, June-July.
Fruit capsules to 0.5 cm, beaked.
Wetland status: NL.
Frequency in NYC: Very infrequently escaped from cultivation.
Habitat: Usually into dry, open soil.