| 词条 | Umbel | ||||
| 释义 |
An umbel is an inflorescence that consists of a number of short flower stalks (called pedicels) which spread from a common point, somewhat like umbrella ribs. The word was coined in botany in the 1590s, from Latin umbella "parasol, sunshade".[1] 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.[2] A small umbel is called an umbellule.[2] The arrangement of the inflorescence in umbels is referred to as umbellate, or occasionally subumbellate (almost umbellate). Umbels are a characteristic of plants such as carrot, parsley, dill, and fennel in the family Apiaceae; ivy, Aralia and Fatsia in the family Araliaceae; onion (Allium) in the family Alliaceae. An umbel is a type of indeterminate inflorescence.[2][3] A compressed cyme, which is a determinate inflorescence, is called umbelliform if it resembles an umbel. GalleryReferences1. ^umbel etymology 2. ^1 2 {{cite book |author1=Beentje, H. |author2=Williamson, J. |year=2010 |title=The Kew Plant Glossary: an Illustrated Dictionary of Plant Terms |publisher=Kew Publishing |location=Royal Botanic Gardens, Kew }} 3. ^{{cite book |author1=Walters, D.R. |author2=Keil, D.J. |year=1975 |title=Vascular Plant Taxonomy |publisher=Kendall/Hunt Publishing Company |location=Dubuque }} }} Further reading
2 : Apiales|Plant morphology |
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