Raceme
A raceme (/reɪˈsiːm, rə-/) or racemoid is an unbranched, indeterminate type of inflorescence bearing flowers having short floral stalks along the shoots that bear the flowers. The oldest flowers grow close to the base and new flowers are produced as the shoot grows in height, with no predetermined growth limit. Examples of racemes occur on mustard (genus Brassica), radish (genus Raphanus), and orchid (genus Phalaenopsis) plants.
Definition
A raceme or racemoid is an unbranched,
Spike
A
Catkin
An ament or catkin is very similar to a spike or raceme "but with subtending bracts so conspicuous as to conceal the flowers until pollination, as in the pussy–willow, alder, [and] birch...". These are sometimes called amentaceous plants.[4]
Spadix
A
Examples
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Raceme
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Spike
-
Catkin
-
Spadix
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Tightly packed raceme of Xeronema callistemon, with prominent red stamens
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Every radiating unit in this inflorescence of a Cyperus sedge is a spikelet composed of small flowers (florets) arranged in two ranks.
Etymology
From classical Latin, a racemus is a cluster of grapes.[5]
See also
References
- ISBN 978-0-7872-2108-9.
- ^ ISBN 978-0-8203-2455-5.
- ^ ISBN 978-1-259-06430-2.
- ^ a b Gilman, Daniel Coit., ed. (1907). The new international encyclopædia. Vol. 10. Peck, Harry Thurston; Colby, Frank Moore. New York: Dodd, Mead and Company. p. 618.
- ^ Oxford English Dictionary. Raceme 2. Bot. A type of inflorescence in which the flowers are arranged on short, nearly equal, lateral pedicels, at equal distances along a single elongated axis