In
botany, an umbel is an
inflorescence that consists of a number of short
flower stalks (called
pedicels) that spread from a common point, somewhat like umbrella ribs. The word was coined in botanical usage 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[2] or umbellets.[3] A small umbel is called an umbellule.[3] The arrangement of the inflorescence in umbels is referred to as umbellate, or occasionally subumbellate (almost umbellate).
An umbel is a type of
indeterminate inflorescence.[3][4]
A compressed
cyme, which is a determinate inflorescence, is called umbelliform if it resembles an umbel.
Gallery
Compound umbel of a hemlock-parsley, Conioselinum pacificum (Apiaceae)
Compound umbel of a wild carrot, Daucus carota (Apiaceae)
^Menglan She; Fading Pu; Zehui Pan; Mark Watson; John F. M. Cannon; Ingrid Holmes-Smith; Eugene V. Kljuykov; Loy R. Phillippe; Michael G. Pimenov.
"Apiaceae Lindley". Flora of China. Vol. 14. Retrieved 15 January 2019 – via eFloras.org,
Missouri Botanical Garden, St. Louis, MO &
Harvard University Herbaria, Cambridge, MA.
^
abcBeentje, H.; Williamson, J. (2010). The Kew Plant Glossary: an Illustrated Dictionary of Plant Terms. Royal Botanic Gardens, Kew: Kew Publishing.
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.
ISSN0031-9422.
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.
ISSN0931-1785.
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.
ISSN1041-2905.