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The Crassulaceae, or orpine family, is a family of dicotyledons. They store water in their succulent leaves. They are found worldwide, but mostly occur in the Northern Hemisphere and southern Africa, typically in dry and/or cold areas where water may be scarce. The family includes about 1,400 species in 33 genera.

Sempervivum heuffelii (syn. Jovibarba heuffelii)

No member of this family is an important crop plant, but many are popular for horticulture; many members have a bizarre intriguing appearance, and are quite hardy, typically needing only minimal care. Familiar species include the Jade plant or "money tree", Crassula ovata.

Classification within the family is difficult because many of the species hybridize readily, both in the wild and in cultivation. Some older classifications included the Crassulaceae in the Rosales, but newer schemes treat them in the order Saxifragales.

CAM photosynthesis (Crassulacean Acid Metabolism) is named after the family, because the pathway was first discovered in crassulacean plants.

Genera

• Adromischus
• Aeonium
• Aichryson
• Cotyledon
• Crassula
• Dudleya
• Echeveria
• Graptopetalum
• Greenovia
• Hylotelephium
  

  

  Flowering Sempervivum hirta subsp. hirta (syn. Jovibarba globiferum subsp. hirtum)
• Hypagophytum
• Jovibarba
• Kalanchoe
• Lenophyllum
• Monanthes
• Orostachys
• Pachyphytum
• Perrierosedum
• Phedimus
• Pistorinia
• Prometheum
• Pseudosedum
• Rhodiola
• Rosularia
  

  

  Sempervivum sobolifera (syn. Jovibarba globiferum subsp. globiferum), Hen and chicks
• Sedum
• Sempervivum
• Thompsonella
• Tylecodon
• Umbilicus
• Villadia

See also

• Alabaster plant

References

• Urs Eggli , ed. Illustrated Handbook of Succulent Plants: Crassulaceae (Springer, 2003) ISBN 3-540-41965-9