The stamen (plural stamina or stamens, from Latin stamen meaning "thread of the warp") is the male organ of a flower. Amaryllis is a monotypic (only one species Genus of plant also known as the Belladonna Lily or naked ladies. Pollen is a fine to coarse powder consisting of microgametophytes ( pollen grains) which produce the male Gametes (sperm cells of Plural is a Grammatical number, typically referring to more than one of the Referent in the real world Latin ( lingua Latīna, laˈtiːna is an Italic language, historically spoken in Latium and Ancient Rome. In Weaving, the warp is the set of lengthwise Yarns through which the Weft is woven In Biology, an organ ( Latin: organum, "instrument tool" from Greek όργανον - organon "organ instrument A flower, also known as a bloom or Blossom, is the reproductive structure found in Flowering plants (plants of the division Magnoliophyta, also Each stamen generally has a stalk called the filament (from Latin filum, meaning "thread"), and, on top of the filament, an anther (from Ancient Greek anthera, feminine of antheros "flowery," from anthos "flower"), and pollen sacs, called microsporangia. The Ancient Greek language is the historical stage in the development of the Hellenic language family spanning the Archaic (c Pollen is a fine to coarse powder consisting of microgametophytes ( pollen grains) which produce the male Gametes (sperm cells of A sporangium (pl sporangia) is a Plant or fungal structure producing and containing Spores Sporangia occur in angiosperms, The development of the microsporangia and the contained haploid gametophytes, (called pollen-grains) is closely comparable with that of the microsporangia in gymnosperms or heterosporous ferns. "Haplo" redirects here For the fictional character see The Death Gate Cycle. In Plants and Algae that undergo Alternation of generations, a gametophyte is the multicellular structure or phase that is Haploid, containing Pollen is a fine to coarse powder consisting of microgametophytes ( pollen grains) which produce the male Gametes (sperm cells of Gymnosperm (Gymnospermae are a group of Spermatophyte seed-bearing Plants with Ovules on the edge or blade of an open Sporophyll, which are A fern is any one of a group of about 20000 Species of Plants classified in the phylum or division Pteridophyta, also known as Filicophyta The pollen is set free by the opening (dehiscence) of the anther, generally by means of longitudinal slits, but sometimes by pores, as in the heath family (Ericaceae), or by valves, as in the barberry family (Berberidaceae). Erica is a Genus of over 700 species of Flowering plants in the family Ericaceae; two English common names both shared with some other closely The Plant family Ericaceae (also called the heath family or ericaceous plants) are mostly lime -hating ( Calcifuge) Berberis ( Bér-be-ris, barberry, pepperidge bush) a Genus of about 450-500 species of Deciduous and Evergreen Berberidaceae is a family of 15 genera Flowering plants commonly called the barberry family It is then dropped, or carried by some external agent — wind, water or some member of the animal kingdom — onto the receptive surface of the carpel of the same or another flower, which is thus pollinated. In biological Taxonomy, a kingdom or regnum is a Taxonomic rank in either (historically the highest rank or (in the new three-domain system A gynoecium (from Ancient Greek gyne, "woman" is the Female reproductive part of a Flower. Pollination in angiosperms and Gymnosperms is the process that transfers pollen grains, which contain the male Gametes (sperm to where the female
Typical flowers have six stamens inside a perianth (the petals and sepals together), arranged in a whorl around the carpel (pistil). A petal (from Ancient Greek petalon "leaf" "thin plate" regarded as a highly modified leaf is one member or part of the corolla A sepal (from Latin separatus "separate" + petalum "petal" is a part of the flower of Angiosperms or flower plants But in some species there are many more than six present in a flower (see, for example, the spider tree flower, below). Collectively, the stamens are called an androecium (from Greek andros oikia: man's house). Greek (el ελληνική γλώσσα or simply el ελληνικά — "Hellenic" is an Indo-European language, spoken today by 15-22 million people mainly They are positioned just below the gynoecium. A gynoecium (from Ancient Greek gyne, "woman" is the Female reproductive part of a Flower. The anthers are bilocular, i. e. they have two locules. Each locule contains a microsporangium. The tissue between the locules and the cells is called the connective.
In an immature, unopened flower bud, the filaments are still short. In Botany, a bud is an undeveloped or embryonic Shoot and normally occurs in the Axil of a Leaf or at the tip of the stem Their function is then to transport nutrients to the developing pollen. A nutrient is food or chemicals that an organism needs to live and grow or a substance used in an organism's metabolism which must be taken in from its environment They start to lengthen once the bud opens. The anther can be attached to the filament in two ways:
- basifixed : attached at its base to the filament; this gives rise to a longitudinal dehiscence (opening along its length to release pollen)
- versatile : attached at its center to the filament; pollen is then released through pores (poricidal dehiscence).
Stamens can be connate (fused or joined in the same whorl):
- monadelphous : fused into a single, compound structure
- diadelphous : joined partially into two androecial structures
- synantherous : only the anthers are connate (such as in the Asteraceae)
Stamens can also be adnate (fused or joined from more than one whorl):
- epipetalous : adnate to the corolla
- didynamous : occurring in two pairs of different length
- tetradynamos : occurring as a set of six filaments with two shorter ones
- exserted : extending beyond the corolla
- included : not extending from the corolla. The family Asteraceae or Compositae (known as the aster, daisy, or sunflower family) is the largest family of Flowering A petal (from Ancient Greek petalon "leaf" "thin plate" regarded as a highly modified leaf is one member or part of the corolla
Plant sexuality
In the typical flower (that is, the majority of flowering plant species) each flower has both a pistil and stamens. A gynoecium (from Ancient Greek gyne, "woman" is the Female reproductive part of a Flower. Bisexual plants are named hermaphrodites or perfect flowers. A hermaphrodite is an organism having both male and female reproductive organs
In some species, however, the flowers are unisexual with only either male or female parts (monoecious = on the same plant; dioecious = on different plants). Plant sexuality covers the wide variety of Sexual reproduction systems found across the Plant kingdom Plant sexuality covers the wide variety of Sexual reproduction systems found across the Plant kingdom A flower with only male reproductive parts is called androecious. A flower with only female reproductive parts is called gynoecious
A flower having only functional stamens is called a staminate flower.
An abortive or rudimentary stamen is called a staminodium, such as in Scrophularia nodosa. "Figwort" redirects here This is also used for some other plants see below.
The pistil and the stamens of orchids are fused into a column. A gynoecium (from Ancient Greek gyne, "woman" is the Female reproductive part of a Flower. The column, or technically the gynostemium, is a reproductive structure that can be found in several plant families Aristolochiaceae, Orchidaceae, and The top part of the column is formed by the anther. This is covered by an anther cap the anther cap coveres the anther.
Gallery
 Flower of the spider tree (Crateva religiosa) with its numerous conspicuous stamens |
 Flowers of wheat at anthesis showing stamens. The flowering tree Crateva religiosa (syn Crataeva religiosa, Crateva adansonii) is called the sacred garlic pear and temple plant Wheat ( Triticum spp is a worldwide cultivated grass from the Levant area of the Middle East. |
 Stamens of a daylily (Hemerocallis), thickly covered in pollen |
 Flowers of the "silk tree" (Albizia julibrissin) have many long thread-like stamens |
 Stamens of a passion flower (Passiflora caerulea) showing interesting symmetry |
References
- This article incorporates text from the Encyclopædia Britannica Eleventh Edition, a publication now in the public domain. Daylilies comprise the small Genus Hemerocallis of flowering plants in the family Hemerocallidaceae. This page is about the tree described by Antonio Durazzini. John Gilbert Baker used the same scientific name to refer to Prain's Albizia kalkora Passion flower ( Passiflora; syn Disemma Labill) is a Genus of about 500 Species of Flowering plants in The Blue Passion Flower ( Passiflora caerulea) also known as the Common Passion Flower, is a Vine native to southern Brazil and Argentina The Encyclopædia Britannica Eleventh Edition (1910–1911 is a 29-volume reference work that marked the beginning of the Encyclopædia Britannica The public domain is a range of abstract materials &ndash commonly referred to as Intellectual property &ndash which are not owned or controlled by anyone