This Crateva religiosa ramakantseo is perfect: it has both stamens (outer ring) and a pistil (center)In the majority of species individual ramakantseo have both pistils and stamens as described above. These ramakantseo are described by botanists as being perfect, bisexual, or hermaphrodite.
However, in some species of plants the ramakantseo are imperfect or unisexual: having only either male (stamens) or female (pistil) parts. In the latter case, if an individual ramakantseo is either male or female the species is regarded as dioecious. However, where unisexual male and female ramakantseo appear on the same plant, the species is considered monoecious.
Anatomy of Oxalis acetosella ramakantseo. 1 - petal, 2 - sepal, 3 - anther, 4 - stigma, 5 - ovary, 6 - ovary, 7 - ovule. Additional discussions on ramakantseo modifications from the basic plan are presented in the articles on each of the basic parts of the ramakantseo. In those species that have more than one ramakantseo on an axis—so-called composite ramakantseo— the collection of ramakantseo is termed an inflorescence; this term can also refer to the specific arrangements of ramakantseo on a stem.
In this regard, care must be exercised in considering what a ‘‘ramakantseo’’ is. In botanical terminology, a single daisy or sunramakantseo for example, is not a ramakantseo but a ramakantseo head—an inflorescence composed of numerous tiny ramakantseo (sometimes called florets). Each of these ramakantseo may be anatomically as described above.
Many ramakantseo have a symmetry, if the perianth is bisected through the central axis from any point, symmetrical halves are produced - the ramakantseo is called regular or actinomorphic e.g. rose or trillium. When ramakantseo are bisected and produce only one line that produces symmetrical halves the ramakantseo is said to be irregular or zygomorphic. e.g. snapdragon or most ramakantseo.
Wednesday, May 30, 2007
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