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Floral symmetry

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Peloria or a peloric flower is the aberration in which a plant that normally produces zygomorphic flowers produces actinomorphic flowers instead. This aberration can be developmental, or it can have a genetic basis: the CYCLOIDEA gene controls floral symmetry. Peloric
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flowers. Sub-networks of plants with zygomorphic flowers share greater connectance, greater asymmetry and lower coextinction robustness for both the plants and the visitor species. Plant taxa with zygomorphic flowers can have a greater risk of
2259: 198:). Some authors prefer the term monosymmetry or bilateral symmetry. The asymmetry allows pollen to be deposited in specific locations on pollinating insects and this specificity can result in evolution of new species. 106:("star shaped", "radial"), meaning they can be divided into three or more identical sectors which are related to each other by rotation about the center of the flower. Typically, each sector might contain one 110:
or one petal and one sepal and so on. It may or may not be possible to divide the flower into symmetrical halves by the same number of longitudinal planes passing through the axis:
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Globally and within individual networks, zygomorphic flowers are a minority. Plants with zygomorphic flowers have smaller number of visitor species compared to those with
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Neal P. R.; Dafni A.; Giurfa M. (1998). "Floral symmetry and its role in plant-pollinator systems: terminology, distribution, and hypotheses".
1954: 1804: 311:("gloxinia") have been bred to have peloric flowers as they are larger and showier than the normally zygomorphic flowers of this species. 182:, shape) flowers can be divided by only a single plane into two mirror-image halves, much like a yoke or a person's face. Examples are 1620: 154: 242:
Actinomorphic flowers are a basal angiosperm character; zygomorphic flowers are a derived character that has evolved many times.
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A few plant species have flowers lacking any symmetry, and therefore having a "handedness". Examples:
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is an example of a flower without such mirror planes. Actinomorphic flowers are also called
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How Long Is the Coast of Britain? Statistical Self-Similarity and Fractional Dimension
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plants have been produced by knocking out this gene. Many modern cultivars of
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Some familiar and seemingly actinomorphic so-called flowers, such as those of
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Floral diagrams: an aid to understanding flower morphology and evolution
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or regular flowers. Other examples of actinomorphic flowers are the
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Endress, P. K. (February 2001). "Evolution of floral symmetry".
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at all, typically because their parts are spirally arranged.
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The Variation of Animals and Plants Under Domestication
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The Variation of Animals and Plants Under Domestication
163:. Ground orchid with typical zygomorphic floral anatomy 333:, showed that his results were largely in line with 421: 2301: 546:Keeble, Frederick; Pellew, C; Jones, WN (1910). 625: 48:(radially symmetric) flower on the same plant 1948: 699: 174:shaped", "bilateral" – from the Greek ζυγόν, 1805:International Association for Plant Taxonomy 1955: 1941: 706: 692: 477:. Cambridge University Press. p. 19. 598:, Cambridge: Cambridge University Press, 470: 447: 395: 1749:International Code of Nomenclature (ICN) 474:Morphology of Flowers and Inflorescences 284: 153: 83: 66:Uncommonly, flowers may have no axis of 29: 501:Losos, J.B.; Mason, K.A.; Singer, S.R. 186:and the flowers of most members of the 14: 2302: 1962: 611: 591: 530: 515: 505:(8th ed.). New York: McGraw Hill. 496: 494: 422:Yoder JB, Gomez G, Carlson CJ (2020). 379: 1936: 687: 621:. Vol. II. London: John Murray. 2241:The Chemical Basis of Morphogenesis 491: 396:Zimmerman, Erin (26 October 2020). 24: 592:Craene, Louis P. Ronse De (2010), 568:10.1111/j.1469-8137.1910.tb05554.x 25: 2321: 1754:ICN for Cultivated Plants (ICNCP) 2063: 1917: 1916: 669:10.1146/annurev.ecolsys.29.1.345 269:head, capitulum, or pseudanthium 73: 585: 539: 524: 509: 464: 415: 237: 149: 55:describes whether, and how, a 13: 1: 640:10.1016/S1369-5266(00)00140-0 367: 1795:History of plant systematics 1382:Thorns, spines, and prickles 217: 98:in actinomorphic arrangement 7: 340: 44:or mirror-symmetric), and 10: 2326: 1611:Alternation of generations 713: 278: 274: 77: 2271: 2221:D'Arcy Wentworth Thompson 2164: 2072: 2061: 1970: 1912: 1860: 1824: 1761:Cultivated plant taxonomy 1724:Biological classification 1714: 1587: 1503: 1399: 1349: 1074: 1004: 947: 909: 883: 819: 739: 721: 471:Weberling, Focko (1992). 1621:Evolutionary development 327:. Later research, using 1272:Hypanthium (Floral cup) 267:of the form known as a 257:), and most species of 1887:by author abbreviation 1811:Plant taxonomy systems 1729:Botanical nomenclature 628:Curr. Opin. Plant Biol 440:10.1098/rsbl.2020.0307 295: 164: 99: 49: 2055:Widmanstätten pattern 1894:Botanical expeditions 288: 225:Valeriana officinalis 157: 87: 78:Further information: 33: 1626:Evolutionary history 1616:Double fertilization 1468:Cellular respiration 317:explored peloria in 116:radially symmetrical 59:, in particular its 2289:Mathematics and art 2279:Pattern recognition 2249:Aristid Lindenmayer 845:Non-vascular plants 357:Symmetry in biology 178:, yoke, and μορφή, 2227:On Growth and Form 2127:Logarithmic spiral 1964:Patterns in nature 1350:Surface structures 1145:Flower development 657:Annu Rev Ecol Syst 550:Digitalis purpurea 347:Patterns in nature 330:Digitalis purpurea 308:Sinningia speciosa 296: 291:Digitalis purpurea 212:pollinator decline 165: 100: 50: 2297: 2296: 2254:Benoît Mandelbrot 2154:Self-organization 2090:Natural selection 2080:Pattern formation 1930: 1929: 1569:Herbaceous plants 1395: 1394: 102:Most flowers are 16:(Redirected from 2317: 2310:Plant morphology 2105:Sexual selection 2067: 1957: 1950: 1943: 1934: 1933: 1920: 1919: 1899:Individual trees 1574:Secondary growth 1545:Succulent plants 1533:Prostrate shrubs 1416:Apical dominance 1401:Plant physiology 1362:Epicuticular wax 907: 906: 900: 891:Plant morphology 708: 701: 694: 685: 684: 680: 651: 622: 608: 580: 579: 543: 537: 528: 522: 513: 507: 506: 498: 489: 488: 468: 462: 461: 451: 419: 413: 412: 410: 408: 393: 387: 377: 192:Scrophulariaceae 160:Satyrium carneum 27:Shape of flowers 21: 2325: 2324: 2320: 2319: 2318: 2316: 2315: 2314: 2300: 2299: 2298: 2293: 2267: 2160: 2068: 2059: 1966: 1961: 1931: 1926: 1908: 1877:Botanical terms 1870: 1856: 1820: 1766:Citrus taxonomy 1744:Author citation 1710: 1604: 1583: 1505: 1499: 1495:Turgor pressure 1403: 1391: 1345: 1160:Floral symmetry 1078: 1070: 1000: 989:Vascular bundle 984:Vascular tissue 943: 903: 894: 893: 879: 850:Vascular plants 815: 811:Plant pathology 735: 717: 712: 613:Darwin, Charles 606: 588: 583: 556:New Phytologist 544: 540: 529: 525: 514: 510: 499: 492: 485: 469: 465: 434:(9): 20200307. 428:Biology Letters 420: 416: 406: 404: 394: 390: 378: 374: 370: 343: 283: 277: 240: 220: 152: 82: 76: 53:Floral symmetry 28: 23: 22: 15: 12: 11: 5: 2323: 2313: 2312: 2295: 2294: 2292: 2291: 2286: 2281: 2275: 2273: 2269: 2268: 2266: 2265: 2264: 2263: 2251: 2246: 2245: 2244: 2232: 2231: 2230: 2218: 2216:Wilson Bentley 2213: 2211:Joseph Plateau 2208: 2203: 2198: 2197: 2196: 2184: 2179: 2174: 2168: 2166: 2162: 2161: 2159: 2158: 2157: 2156: 2151: 2149:Plateau's laws 2146: 2144:Fluid dynamics 2141: 2131: 2130: 2129: 2124: 2119: 2109: 2108: 2107: 2102: 2097: 2092: 2082: 2076: 2074: 2070: 2069: 2062: 2060: 2058: 2057: 2052: 2047: 2042: 2037: 2036: 2035: 2030: 2025: 2020: 2010: 2005: 2000: 1995: 1990: 1985: 1980: 1974: 1972: 1968: 1967: 1960: 1959: 1952: 1945: 1937: 1928: 1927: 1925: 1924: 1913: 1910: 1909: 1907: 1906: 1901: 1896: 1891: 1890: 1889: 1879: 1873: 1871: 1869: 1868: 1867:Related topics 1865: 1861: 1858: 1857: 1855: 1854: 1849: 1844: 1839: 1834: 1828: 1826: 1822: 1821: 1819: 1818: 1816:Taxonomic rank 1813: 1808: 1802: 1797: 1792: 1791: 1790: 1789: 1788: 1783: 1778: 1768: 1758: 1757: 1756: 1751: 1746: 1741: 1736: 1734:Botanical name 1726: 1720: 1718: 1716:Plant taxonomy 1712: 1711: 1709: 1708: 1707: 1706: 1701: 1700: 1699: 1692:Megasporangium 1689: 1688: 1687: 1680:Microsporangia 1672: 1671: 1670: 1665: 1660: 1655: 1645: 1640: 1635: 1634: 1633: 1623: 1618: 1613: 1607: 1605: 1603: 1602: 1597: 1591: 1585: 1584: 1582: 1581: 1576: 1571: 1566: 1565: 1564: 1563: 1562: 1552: 1547: 1542: 1541: 1540: 1535: 1525: 1520: 1518:Cushion plants 1509: 1507: 1501: 1500: 1498: 1497: 1492: 1487: 1482: 1477: 1472: 1471: 1470: 1465: 1455: 1453:Plant hormones 1450: 1445: 1444: 1443: 1436:Photosynthesis 1433: 1428: 1423: 1418: 1413: 1407: 1405: 1397: 1396: 1393: 1392: 1390: 1389: 1384: 1379: 1374: 1369: 1364: 1359: 1353: 1351: 1347: 1346: 1344: 1343: 1338: 1333: 1328: 1323: 1322: 1321: 1316: 1311: 1301: 1300: 1299: 1294: 1289: 1284: 1274: 1269: 1268: 1267: 1266: 1265: 1260: 1255: 1254: 1253: 1248: 1228: 1223: 1218: 1217: 1216: 1215: 1214: 1209: 1199: 1194: 1189: 1184: 1179: 1169: 1168: 1167: 1162: 1157: 1155:Floral formula 1152: 1150:Floral diagram 1147: 1142: 1132: 1131: 1130: 1125: 1120: 1119: 1118: 1113: 1103: 1093: 1088: 1082: 1080: 1079:(incl. Flower) 1072: 1071: 1069: 1068: 1067: 1066: 1061: 1056: 1055: 1054: 1049: 1039: 1029: 1024: 1019: 1014: 1008: 1006: 1002: 1001: 999: 998: 993: 992: 991: 981: 979:Storage organs 976: 971: 970: 969: 959: 953: 951: 945: 944: 942: 941: 936: 931: 926: 921: 915: 913: 904: 902: 901: 887: 881: 880: 878: 877: 872: 867: 865:Spermatophytes 862: 857: 852: 847: 842: 837: 835:Archaeplastida 832: 826: 824: 817: 816: 814: 813: 808: 803: 798: 797: 796: 789:Phytogeography 786: 784:Phytochemistry 781: 776: 771: 766: 761: 756: 751: 745: 743: 741:Subdisciplines 737: 736: 734: 733: 728: 722: 719: 718: 711: 710: 703: 696: 688: 682: 681: 652: 623: 609: 604: 587: 584: 582: 581: 562:(1–2): 68–77. 538: 523: 508: 490: 483: 463: 414: 388: 371: 369: 366: 365: 364: 362:Whorl (botany) 359: 354: 349: 342: 339: 315:Charles Darwin 279:Main article: 276: 273: 239: 236: 219: 216: 151: 148: 75: 72: 26: 9: 6: 4: 3: 2: 2322: 2311: 2308: 2307: 2305: 2290: 2287: 2285: 2282: 2280: 2277: 2276: 2274: 2270: 2262: 2261: 2257: 2256: 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Retrieved 401: 391: 375: 328: 322: 318: 313: 306: 300: 297: 289: 258: 244: 241: 231:Canna indica 229: 224: 221: 200: 196:Gesneriaceae 179: 175: 167: 166: 158: 137: 123: 103: 101: 88: 65: 52: 51: 35: 2235:Alan Turing 2193:Liber Abaci 2112:Mathematics 2018:in crystals 2008:Soap bubble 2003:Phyllotaxis 1663:Pollen tube 1658:Pollinators 1648:Pollination 1643:Germination 1458:Respiration 1441:Chlorophyll 1287:Pedicellate 1221:Gametophyte 1140:Aestivation 1091:Antheridium 1086:Archegonium 934:Plasmodesma 911:Plant cells 774:Paleobotany 769:Ethnobotany 754:Astrobotany 663:: 345–373. 531:Darwin 1868 518:, pp.  516:Darwin 1868 380:Craene 2010 352:Phyllotaxis 319:Antirrhinum 302:Antirrhinum 238:Differences 168:Zygomorphic 150:Zygomorphic 42:zygomorphic 2182:Empedocles 2177:Pythagoras 2095:Camouflage 2033:in biology 2028:in flowers 1998:Parastichy 1685:Microspore 1675:Sporangium 1653:Artificial 1341:Sporophyte 1336:Sporophyll 1331:Receptacle 1226:Gynandrium 1096:Androecium 1005:Vegetative 875:Angiosperm 870:Gymnosperm 764:Dendrology 533:, p.  407:30 October 402:Botany ONE 384:p. 25 368:References 255:Asteraceae 251:dandelions 208:extinction 139:Ranunculus 132:) and the 2284:Emergence 2187:Fibonacci 1882:Botanists 1800:Herbarium 1697:Megaspore 1595:Evolution 1538:Subshrubs 1506:and habit 1431:Nutrition 1426:Cellulose 1421:Bulk flow 1404:Materials 1367:Epidermis 1231:Gynoecium 1212:Endosperm 1207:Dispersal 1123:Staminode 1059:Sessility 1047:Cataphyll 967:Mesophyll 919:Cell wall 860:Lycophyte 840:Bryophyte 794:Geobotany 779:Phycology 335:Mendelian 218:Asymmetry 134:buttercup 130:Liliaceae 2304:Category 2013:Symmetry 1971:Patterns 1922:Category 1842:Forestry 1832:Agronomy 1825:Practice 1776:Cultivar 1771:Cultigen 1631:timeline 1523:Rosettes 1411:Aleurone 1387:Trichome 1304:Perianth 1116:Filament 974:Meristem 897:glossary 759:Bryology 648:11163173 615:(1868). 458:32871089 341:See also 337:theory. 281:Pelorism 188:Lamiales 112:oleander 80:Merosity 68:symmetry 61:perianth 40:flower ( 2272:Related 2139:Crystal 2134:Physics 2122:Fractal 2100:Mimicry 2085:Biology 1993:Meander 1600:Ecology 1357:Cuticle 1187:Capsule 1177:Anatomy 1128:Tapetum 1052:Petiole 1027:Rhizome 1022:Rhizoid 949:Tissues 939:Vacuole 929:Plastid 731:Outline 726:History 576:2427515 503:Biology 449:7532724 275:Peloria 247:daisies 210:due to 190:(e.g., 184:orchids 92:stricta 90:Wurmbea 46:peloric 34:Normal 2165:People 2073:Causes 1904:Plants 1807:(IAPT) 1560:Lianas 1528:Shrubs 1480:Starch 1372:Nectar 1292:Raceme 1258:Stigma 1246:Locule 1236:Carpel 1197:Pyrena 1135:Flower 1111:Anther 1106:Stamen 1101:Pollen 823:groups 715:Botany 677:221712 675:  646:  602:  574:  481:  456:  446:  260:Protea 180:morphe 125:Lilium 96:tepals 94:, its 57:flower 2172:Plato 1978:Crack 1864:Lists 1781:Group 1704:Spore 1638:Flora 1555:Vines 1550:Trees 1513:Habit 1485:Sugar 1377:Stoma 1319:Sepal 1314:Petal 1309:Tepal 1297:Umbel 1282:Bract 1263:Style 1251:Ovule 1241:Ovary 1182:Berry 1172:Fruit 1165:Whorl 1032:Shoot 830:Algae 821:Plant 673:JSTOR 572:JSTOR 520:33–34 176:zygon 108:tepal 2050:Wave 1988:Foam 1983:Dune 1786:Grex 1668:Self 1202:Seed 1064:Stem 1042:Leaf 1017:Root 1012:Bulb 996:Wood 957:Cork 855:Fern 644:PMID 600:ISBN 479:ISBN 454:PMID 409:2020 249:and 228:and 194:and 172:yoke 120:lily 1475:Sap 1192:Nut 1037:Bud 665:doi 636:doi 564:doi 444:PMC 436:doi 146:). 2306:: 671:. 661:29 659:. 642:. 630:. 570:. 558:. 554:. 552:)" 535:46 493:^ 452:. 442:. 432:16 430:. 426:. 400:. 382:, 271:. 234:. 214:. 170:(" 142:, 128:, 1956:e 1949:t 1942:v 899:) 895:( 707:e 700:t 693:v 679:. 667:: 650:. 638:: 632:4 578:. 566:: 560:9 487:. 460:. 438:: 411:. 386:. 253:( 136:( 122:( 20:)

Index

Actinomorphic

Streptocarpus
zygomorphic
peloric
flower
perianth
symmetry
Merosity

Wurmbea
tepals
tepal
oleander
radially symmetrical
lily
Lilium
Liliaceae
buttercup
Ranunculus
Ranunculaceae

Satyrium carneum
yoke
orchids
Lamiales
Scrophulariaceae
Gesneriaceae
actinomorphic
extinction

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