Umbel

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For the computer science ontology, see UMBEL.

An umbel is an inflorescence which consists of a number of short flower stalks (called pedicels) which spread from a common point, somewhat like umbrella ribs. 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[citation needed] or umbellets.[1] A small umbel is called an umbellule.ref name= Beentje/> 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; and onion (Allium) in the family Alliaceae.

An umbel is a type of indeterminate inflorescence.[1][2] A compressed cyme, which is a determinate inflorescence, is called umbelliform if it resembles an umbel.

Gallery[edit]

References[edit]

  1. ^ a b Beentje, H.; Williamson, J. (2010). The Kew Plant Glossary: an Illustrated Dictionary of Plant Terms. Royal Botanic Gardens, Kew: Kew Publishing. 
  2. ^ Walters, D.R.; Keil, D.J. (1975). Vascular Plant Taxonomy. Dubuque: Kendall/Hunt Publishing Company. 

Further reading[edit]

  • Hinderer, Walter; Noé, Wolfgang; Seitz, Hanns Ulrich (1983). "Differentiation of metabolic pathways in the umbel of Daucus carota". Phytochemistry 22 (11): 2417–2420. doi:10.1016/0031-9422(83)80131-9. ISSN 0031-9422. 
  • Toben, H.-M.; Rudoph, K (1996). "Pseudomonas syringae pv. coriandricola, Incitant of Bacterial Umbel Blight and Seed Decay of Coriander (Coriandrum sativum L.) in Germany". Journal of Phytopathology 144 (4): 169–178. doi:10.1111/j.1439-0434.1996.tb01510.x. ISSN 0931-1785. 
  • Peterson, L. E.; Clark, R. J.; Menary, R. C. (1993). "Umbel Initiation and Stem Elongation in Fennel(Foeniculum vulgare)Initiated by Photoperiod". Journal of Essential Oil Research 5 (1): 37–43. doi:10.1080/10412905.1993.9698168. ISSN 1041-2905.