Crassula tillaea

{{Short description|Species of succulent}}

{{speciesbox

|name = Mossy stonecrop

|image = Crassula tillaea.jpg

|status= LC

|status_system = IUCN3.1

|status_ref = {{cite iucn |author=Lansdown, R.V. |author2=Rhazi, L. |author3=Grillas, P. |author4=Rhazi, M. |author5=Flanagan, D. |date=2013 |title=Crassula tillaea |volume=2013 |page=e.T164302A13542044 |doi=10.2305/IUCN.UK.2013-1.RLTS.T164302A13542044.en |access-date=18 November 2021}}

|genus = Crassula

|species = tillaea

|authority = Lester-Garland

|synonyms = Crassula mucosa
Tillaea mucosa

}}

Crassula tillaea is a succulent plant known by its common names mossy stonecrop{{BSBI 2007 |accessdate=2014-10-17 }} and moss pygmyweed. It is a small fleshy plant growing only a few centimeters in height. It is green when new and gradually turns orange and then deep red when mature. It has tiny triangular pointed leaves only a few millimeters long. A tiny flower or pair of flowers grows between each oppositely-arranged pair of leaves; the flowers are about two millimeters in length and width. The fruit is a minute follicle containing one or two seeds. This plant is native to Eurasia, particularly the Mediterranean Basin, but is known in other regions as an introduced species.