| Taxon | Crassula tillaea |
| group | Eudicots |
| Family | Crassulaceae |
| Family common name(s) | stonecrop; stone-crop; stonecrops; live-forever; live forever; liveforever; hen-and-chickens; hen and chickens; orpine; houseleek; houseleeks |
| Genus common name(s) | crassula; pygmyweed; pygmy-weed; pygmy weed; pygmy-stonecrop; pygmy stonecrop; pigmy-weed; pigmy weed; pigmyweed; pigmy-stonecrop; pigmy stonecrop |
| Species common name(s) | moss pygmyweed; moss pygmy-weed; moss pigmy-weed; moss pygmy weed; moss pygmy-stonecrop; mossy pygmyweed; mossy pigmyweed; mossy pigmy weed; mossy tillaea; mossy tillea; mossy stonecrop; Mediterranean pygmy-weed; Mediterranean pygmyweed; Mediterranean pygmy-weed; Mediterranean pygmy weed |
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| Common name(s) generally applied to other taxa or multiple taxa | common pygmyweed, common pigmyweed are applied to multiple Crassula taxa |
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| Notes | Mediterranean is a proper name, so upper case preferable |
| Synonymy: The Jepson Manual (1993), FNA, PLANTS, etc | Tillaea muscosa L. |
