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Tomentose leaves and flowers. Cotyledon tomentosa is a perennial evergreen shrub, which is a member of the Crassulaceae family of succulent flowering plants. [7] C. tomentosa has red, orange, or yellow bell-shaped flowers between July and September, [12] [7] and there are two recognized subspecies, subsp. tomentosa and subsp. ladismithiensis.
Together with Tylecodon, Kalanchoe and Adromischus, it forms a sister clade to the family's basal Crassula clade. [1] Until the 1960s, some 150 species were included in the genus Cotyledon, [4] but subsequently it was split into at least Adromischus, Dudleya, Rosularia, and Tylecodon, leaving probably less than two dozen species in Cotyledon. [5]
Dicotyledon plantlet Young castor oil plant showing its prominent two embryonic leaves (), which differ from the adult leaves. The dicotyledons, also known as dicots (or, more rarely, dicotyls), [2] are one of the two groups into which all the flowering plants (angiosperms) were formerly divided.
An illustration of Cotyledon farinosa from Jepson's A manual of the flowering plants of California (1923). Britton and Rose's new genus was not quickly accepted. Into the 1920s and 1930s, botanists such as Willis Lynn Jepson still retained Cotyledon farinosa , while others still used Echeveria, like Alwin Berger .
The eudicots or eudicotyledons are flowering plants that have two seed leaves (cotyledons) upon germination. [1] The term derives from dicotyledon (etymologically, eu = true; di = two; cotyledon = seed leaf). Historically, authors have used the terms tricolpates or non-magnoliid dicots.
Cotyledon from a Judas-tree (Cercis siliquastrum, a dicot) seedling Comparison of a monocot and dicot sprouting. The visible part of the monocot plant (left) is actually the first true leaf produced from the meristem; the cotyledon itself remains within the seed Schematic of epigeal vs hypogeal germination Peanut seeds split in half, showing the embryos with cotyledons and primordial root Two ...