Text-book of structural and physiological botany . characteristic, and different in formfrom the foliage-leaves which are subse-quently developed, and bear the name otseed-leaves or cotyledo7is. They are some-times thin and leaf-like, sometimes thick^embryo;^™/^ ^ud fleshy. The green colour which manywith reticulated cotylcdons assumc as soon as they rise testa (magnmed). -^ ... above the ground after germination is onlydeveloped under the influence of light; it is not foundwhile they are still enclosed in the testa. The thicker andmore fleshy cotyledons which often occupy the greater partof t
Text-book of structural and physiological botany . characteristic, and different in formfrom the foliage-leaves which are subse-quently developed, and bear the name otseed-leaves or cotyledo7is. They are some-times thin and leaf-like, sometimes thick^embryo;^™/^ ^ud fleshy. The green colour which manywith reticulated cotylcdons assumc as soon as they rise testa (magnmed). -^ ... above the ground after germination is onlydeveloped under the influence of light; it is not foundwhile they are still enclosed in the testa. The thicker andmore fleshy cotyledons which often occupy the greater partof the seed, as in Leguminosae, have scarcely anything incommon with the later foliage-leaves of the plant, andgenerally remain underground after germination. Dependenton the number of cotyledons, plants are divided primarilyinto Dicotyledones with two, Monocotyledones with onlyone, and Acotyledones [flowerless plants], without any. Alarger number of cotyledons than two is rare, and is peculiarto certain Coniferse (Fig. 335). In a few cases, as the. The External Form of Plants. 157
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Keywords: ., bookcentury1800, bookdecade1870, bookpublishernewyorkjwileysons
