Name: from the Latin "imbrex" meaning partially overlapping.
Genus: ± 25 species.
Region: Mexico; Peru, United States, Guatemala.
Habitat: frost tolerant; prefers full sun.
BotanyHerb; succulent; clump-forming; 5 to 10 cm tall.
Flowers: white; petals fused at base, form a tube.
Inflorescence: a spike, raceme or thyrse.