Definify.com
Webster 1913 Edition
Portulaca
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Porˊtu-la′ca
,Noun.
[L., purslane.]
(Bot.)
A genus of polypetalous plants; also, any plant of the genus.
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Portulaca oleracea
is the common purslane. Portulaca grandiflora
is a South American herb, widely cultivated for its showy crimson, scarlet, yellow, or white, ephemeral blossoms.