The genus Sedum (sensu lato) is a large and diverse grouping of species. Various molecular studies since 1995 have indicated that many of these species would be better placed within segregate genera - a treatment that is not universally recognized. We have chosen to follow the Flora of China[
] and Flora of N. America[
] in recognizing these new genera. When the nomenclatural, biogeographic, and morphological data has become available for many other groupings within Sedum, it is likely that more new genera will be established - to date we have transferred a number of species to the genera Hylotelephium. Phedimus and Rhodeola[
Cotyledon brittoniana Fedde
Cotyledon mendocinoana Fedde
Echeveria gormanii A.Nelson & J.F.Macbr.
Gormania laxa Britton
Sedum heckneri M.Peck
Common Name: Roseflower Stonecrop
Sedum laxum is a stout, evergreen, perennial plant; it produces a cluster of stems up to 30cm tall[
The plant is harvested from the wild for local use as a food. It is sometimes grown as an ornamental in gardens.
All species in the genus Sedum (including the closely allied genera such as Hylotelephium and Phedimus) have more or less edible leaves and young flowering stems, though they are not always totally desireable with several species having bitter, acrid or peppery flavours!
However, the plants contain various alkaloids including sedine and sedamine. These can sometimes cause gastric upsets, usually of a mild nature[
]. This is most likely to happen with species that have yellow flowers, though eating large quantities of any species could be problematic[
Western N. America - Oregon, California
Serpentine bluffs; at elevations from 30 - 140 metres[
|Cultivation Status||Ornamental, Wild
Sedum laxum is a moderately cold-hardy plant, tolerating temperatures down to around -15°c when dormant[
Most Sedum species will grow best if given a moist, but well-drained, fairly fertile soil in a sunny position[
]. Many of the species will do well in quite dry positions, in poor soils and in light shade - see notes on the plant's habitat for ideas about this[
]. Most species are somewhat to very drought tolerant[
This species has pink flowers. All members of this genus are said to have edible leaves, though those species that have yellow flowers can cause stomach upsets if they are eaten in quantity[
The plant is unusual in forming offsets in axils of rosette leaves rather than on a rootstock or creeping stem[
Species in this genus are often specially targeted by slugs[
Plants in this genus seem to be immune to the predations of rabbits[
Leaves - raw[
]. Traditionally, the leaves were rolled in the palm of hand together with salt grass (Distichlis spicata) leaves and stems then eaten[
We have seen no specific reports on medicinal uses for this species, but Sedum species (including Hylotelephium and Phedimus) generally contain various medicinally active compounds including alkaloids, tannins, cyanogenic compounds and, in particular, a range of flavanoids with anti-inflammatory and pain relieving properties. Many Sedum species are used medicinally to treat pain and inflammation - in addition a poultice made from the crushed, succulent leaves and young stems can be applied topically to cuts, wounds, burns and various skin disorders[
Seed - surface sow in spring in well-drained soil in a sunny position in a greenhouse. Do not allow the soil to dry out. Prick out the seedlings into individual pots when they are large enough to handle. If sufficient growth is made, it is possible to plant them out during the summer, otherwise keep them in a cold-frame or greenhouse for their first winter and plant them out in early summer of the following year[
Division is very easy and can be carried out at almost any time in the growing season, though is probably best done in spring or early summer. Larger divisions can be planted out direct into their permanent positions. We have found it best to pot up the smaller divisions and grow them on in a lightly shaded position in a cold frame, planting them out once they are well established in the summer.
Offsets that are produced in the leaf axils[