- Latin synonym: Phedimus aizoon
- Family: Stonecrop Family – Crassulaceae
- Growing form: Perennial herb. Rootstock thin.
- Height: 20–40 cm (8–16 in.). Stem erect, bristly, reddish brown base.
- Flower: Corolla regular (actinomorphic), yellow, approx. 2 cm wide; petals five, 7–9 mm (0.28–0.35 in.) long. Sepals 5, different lengths, blunt. Stamens 10. Gynoecium with separate leaves, pistils 5. Inflorescence a dense cyme around leaves.
- Leaves: Alternate, stalkless. Blade lanceolate, wedge-shaped base, usually with serrated margin, flat, fleshy, glabrous.
- Fruit: Cluster of 5 many-seeded, basally united follicles.
- Habitat: Rocks, walls, roadsides. Ornamental, sometimes wild.
- Flowering time: June–July.
Eight native species of stonecrop grow wild in Finland, and a whole lot more have been brought here as garden ornamentals. Many of these still survive in the place they were planted even though the house might have rotted and the foundations are all covered in moss. Rootstock that is planted in a garden can survive for decades or even centuries, forming its own stand of clones, inching its way out the plot and onto nearby rocky outcrops, waste lands and so on.
Aizoon stonecrop is native to eastern Siberia. It has long been cultivated in Finnish gardens for its handsome dark yellow inflorescence and has sometimes escaped to grow on its own in dry, sandy places. It is rarely planted nowadays, even though it is one of the most impressive ornamental stonecrops. Its rigidly erect stems should not be cut in the autumn because they often stand out beautifully in winter with their orange infructescences.
Hybrid Stonecrop & Kamschatca Stonecrop
Sedum hybridum & Sedum kamtschaticum
(also Phedimus hybridus & Phedimus kamtschaticus)
Aizoon stonecrop’s close relative, hybrid stonecrop is in fact not a hybrid, although the species’ name would suggest otherwise. It grows ferally in Siberia and Mongolia, and slightly to the west of the Urals. It can easily be differentiated from other stonecrops that grow in Finland by its rather short, limp stems and yellow flowers. Another quite rare escape, Kamschatka stonecrop (orange stonecrop, Russian stonecrop resambles hybrid stonecrop and even in garden shops these species quite often have mixed names.