Diminutive of crassus— thick, referring to the fleshy leaves and branches.
Small, soft-wooded shrubs, annual herbs or aquatic plants. Leaves opposite, united at the base, not deciduous. Flower clusters branching. Flowers 3-5-parted, usually with leafy bracts. Sepals shortly united at the base, fleshy, often of unequal size. Petals shortly united at the base if at all, spreading or tube-like, the apices bent back. Stamens in 1 whorl. Carpels free, each with 1-few ovules.
Grown mostly as curiosities and once very popular, often found in rockeries and sometimes remaining in or spreading from old gardens.Many more species than those described may be found.The genus Tillaea L. is sometimes segregated from Crassula.
About 170-200 species from temperate regions, the centre of distribution being in southern Africa. Australia has 8 endemic species.
Stem or leaf cuttings.
Opposite leaves more or less fused at the base; stamens in 1 whorl.
Higgins (1964), Toelken (1977, 1985).
Source: (2002). Crassulaceae. In: . Horticultural Flora of South-eastern Australia. Volume 3. Flowering plants. Dicotyledons. Part 2. The identification of garden and cultivated plants. University of New South Wales Press.
The exact identity of this cultivar is uncertain, possibly c. arborescens subsp. undulatifolia. Low, robust shrub with oval, glaucous leaves.
Possibly a hybrid between c. sussanae and c. barklyi.
A hybrid between c. rupestris subsp. marnieriana and c. perfoliata var. falcata.
A hybrid between c. barbata and possibly c. orbiculata.
A hybrid possibly between c. perfoliata var. falcata and c. rupestris.
A hybrid between c. rupestris subsp. marnieriana and, probably, c. rupestris subsp. rupestris.