Plants knowledge
Spermatophytes
Spermatophytes are divided into gymnosperms and angiosperms. The name Angiosperms comes from the Greek words: angeion, “vase”, and sperm, “seeds”. This name means that the seeds of these plants are not “naked”, but encased in a specific structure, the ovary, that protects them from the external environment. The differences between Angiosperms and Gymnosperms are generally very clear .
The most important ones are:
• the Angiosperms include many wood or shrub species as well as many herbaceous species (unlike Gymnosperms);
• the cotyledons (i.e. the apparatuses that store food to feed the plant embryo) in Gymnosperms and few in Angiosperms (normally, one in monocotyledons sand two in dicotyledons);
• finally, in Gymnosperms the leaves are generally small and thin (needle- or scale-shaped leaves), while in Angiosperm they are more or less large and generally have an expanded lamina and reticulated or parallel ribs.
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