Crassulaceae

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  Crassula

  1a. Plants annual, aquatic or amphibious; flowers solitary in the axils of the leaves; perianth 3- or 4-merous; stamens 3 or 4 per flower (i.e., as many as the petals); leaves connate around the stem
• See list of 6 genera in 1b
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  1b. Plants perennial, terrestrial; flowers usually borne in cymes; perianth 4- to 16-merous; stamens usually 8–32 per flower (i.e., twice as many as the petals); leaves not connate around the stem
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    Sempervivum

    2a. Perianth mostly 12- to 16-merous; stamens mostly 24–32 per flower; leaves in crowded, basal rosettes; plants monocarpic
  • See list of 5 genera in 2b
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    2b. Perianth mostly 4- or 5-merous; stamens mostly 8 or 10 per flower; leaves borne on a stem; plants polycarpic
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      Sedum

      3a. Leaf blades entire, often very thick (i.e., elliptic, semi-circular, or terete in cross-section) [Fig. 599]; leaves alternate, opposite, or whorled; plants forming mats by means of creeping stems (not mat-forming in S. hispanicum)
    • See list of 4 genera in 3b
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      3b. Leaf blades toothed (sometimes inconspicuously so), broad and flat [Figs. 596,597,598]; leaves alternate (opposite in Phedimus spurius); plants with upright stems, sometimes basally decumbent in age (mat-forming by creeping stems in Phedimus spurius)
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        Rhodiola

        4a. Flowers 4-merous (rarely 5-merous), unisexual; reproductive stems produced from the axils of brown, scale-like leaves on a partly subterranean rootstock
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        4b. Flowers 5-merous [Fig. 596], bisexual (sometimes with defective and missing parts in Hylotelephium erythrostictum); reproductive stems produced from underground, tuberous roots or arising from creeping, horizontal stems
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          5a. Plants forming mats by creeping, horizontal stems; roots not tuberous; 
leaves opposite
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            Aizopsis

            6a. Petals yellow, spreading from base [Fig. 596] (in part)
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            Phedimus

            6b. Petals pink to pink-purple, erect to ascending at the base and spreading above [Fig. 598]
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          5b. Plants not forming mats; roots tuberous, carrot-shaped; leaves alternate, opposite, whorled, or sometimes varied on a single plant
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            Hylotelephium

            7a. Ovaries and follicles narrowly tapering at base, stipitate, lacking an adaxial outgrowth; petals red-purple to purple or white
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            Aizopsis

            7b. Ovaries and follicles not tapering at base, sessile, with an adaxial outgrowith; petals yellow (in part)

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 Show photos of:   Each photo represents one genus in this family.