"In botany, an umbel is an inflorescence that consists of a number of short flower stalks (called pedicels) which spread from a common point, somewhat like ...
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umbrella ribs. The word was coined in botanical usage in the 1590s, from Latin umbella "parasol, sunshade". The arrangement can vary from being flat-topped to almost spherical. Umbels can be simple or compound. The secondary umbels of compound umbels are known as umbellules or umbellets. A small umbel is called an umbellule. The arrangement of the inflorescence in umbels is referred to as umbellate, or occasionally subumbellate (almost umbellate)." - (en.wikipedia.org 06.05.2022)