FIGURE 2 in Notes on the nomenclature and taxonomy of Chiastophyllum and Umbilicus oppositifolius (≡Cotyledon oppositifolia, ≡Chiastophyllum oppositifolium) (Crassulaceae subfam. Sempervivoideae)

FIGURE 2. The leaves of most species of Umbilicus, such as U. rupestris (Salisbury 1796: 307) Dandy (1948: 611) shown here as a lithophyte on a rock wall in central Portugal near the town of Serra de Santo António, are peltate, more or less round in outline, and have a navel-like depression in the centre (for which the genus was named). Photograph: Gideon F. Smith.