What's the difference between liveforever and sempervivum?

Liveforever

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Definition:

Example Sentences:

Sempervivum

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Definition:

• (n.) A genus of fleshy-leaved plants, of which the houseleek (Sempervivum tectorum) is the commonest species.

Example Sentences:

• (1) Mulch newly planted trees and shrubs after a good watering, and choose new plants adapted to drought, such as grey-foliaged plants, sages, lavenders, santolina, or those with fat leaves which store water, such as sedums and sempervivums.