When the seed of a plant germinates, that first leaf or set of leaves to unfold is called a cotyledon. Cotyledons are developed by the embryo of the seed and are sometimes called seed-leaves. They contain stored food reserves from the seed, used to keep the seedling fed until the next set of leaves, considered the "true leaves," appears. Once the second set of true leaves sprouts, the plant will begin photosynthesis. The cotyledons will wither and disappear soon after the true leaves start to grow.
|Posted by Baja_Costero (Baja California - Zone 11b) on Jan 16, 2019 8:41 PM
This fairly old succulent genus is characterized by opposite leaves on relatively short stems, with terminal inflorescences bearing 5-part flowers that are hanging and tubular. From Southern Africa (10 species from South Africa), up to Arabia.
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