{"id":1521,"date":"2026-05-14T16:14:01","date_gmt":"2026-05-14T07:14:01","guid":{"rendered":"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/?p=1521"},"modified":"2026-05-14T16:25:38","modified_gmt":"2026-05-14T07:25:38","slug":"%e3%83%87%e3%83%93%e3%83%ab%e3%82%ba%e3%83%8f%e3%83%b3%e3%83%89%e3%83%84%e3%83%aa%e3%83%bc%e3%81%ae%e5%a5%87%e5%a6%99%e3%81%aa%e9%9b%84%e3%81%9a%e3%81%84-the-bizarre-stamens-of-the-devils-ha","status":"publish","type":"post","link":"http:\/\/www.nibb.ac.jp\/plantdic\/blog\/?p=1521","title":{"rendered":"\u30c7\u30d3\u30eb\u30ba\u30cf\u30f3\u30c9\u30c4\u30ea\u30fc\u306e\u5947\u5999\u306a\u96c4\u305a\u3044  The bizarre stamens of the devil\u2019s hand tree"},"content":{"rendered":"\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/1_Fremontodendron_Chiranthodendron.jpeg\"><img decoding=\"async\" loading=\"lazy\" width=\"1600\" height=\"1200\" src=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/1_Fremontodendron_Chiranthodendron.jpeg\" alt=\"\" class=\"wp-image-1523\"\/><\/a><figcaption class=\"wp-element-caption\"><em>Fremontodendron californicum<\/em>: photo by_garyashby, https:\/\/www.inaturalist.org\/observations\/652481152, CC BY-NC<br><em>Chiranthodendron pentadactylon<\/em>-1: photo by Erick Noe Tapia Banda, https:\/\/www.inaturalist.org\/observations\/17300607, CC BY-NC<\/figcaption><\/figure>\n\n\n\n<p>\u30d5\u30ec\u30e2\u30f3\u30c8\u30c7\u30f3\u30c9\u30ed\u30f3\u5c5e <em>Fremontodendron<\/em> \u3068\u30ad\u30e9\u30f3\u30c8\u30c7\u30f3\u30c9\u30ed\u30f3\u5c5e <em>Chiranthodendron<\/em> \u306f\u59c9\u59b9\u7fa4\u95a2\u4fc2\u306b\u3042\u308a\u3001\u30d5\u30ec\u30e2\u30f3\u30c8\u30c7\u30f3\u30c9\u30ed\u30f3\u9023 <em>Fremontodendreae<\/em> \u3092\u69cb\u6210\u3059\u308b\uff08Baum et al. 2004\uff09\u3002\u3053\u306e\u7cfb\u7d71\u7fa4\u306f\u3001\u30a2\u30aa\u30a4\u4e9c\u79d1 <em>Malvoideae<\/em> \u304a\u3088\u3073\u30d1\u30f3\u30e4\u4e9c\u79d1 <em>Bombacoideae<\/em> \u3068\u5358\u7cfb\u7d71\u7fa4\u3092\u5f62\u6210\u3059\u308b\u304c\u3001\uff13\u8005\u9593\u306e\u7cfb\u7d71\u95a2\u4fc2\u306f\u5341\u5206\u306b\u306f\u89e3\u660e\u3055\u308c\u3066\u3044\u306a\u3044\uff08Baum et al. 2004; Colli-Silva et al. 2025\uff09\u3002\u30d5\u30ec\u30e2\u30f3\u30c8\u30c7\u30f3\u30c9\u30ed\u30f3\u5c5e\u306e\u96c4\u305a\u3044\u306f\u653e\u5c04\u76f8\u79f0\u3067\u3042\u308b\u306e\u306b\u5bfe\u3057\u3001\u30ad\u30e9\u30f3\u30c8\u30c7\u30f3\u30c9\u30ed\u30f3\u5c5e\u306e\u96c4\u305a\u3044\u306f\u5de6\u53f3\u76f8\u79f0\u3067\u3001\u624b\u306e\u3088\u3046\u306a\u5f62\u614b\u3092\u793a\u3059\u305f\u3081\u3001\u5b66\u540d\u306e<em>Chiranthodendron<\/em>\u306f\u624b\u306e\u3088\u3046\u306a\u82b1\u3092\u3064\u3051\u308b\u6728\u306e\u610f\u5473\u3067\u3001\u30c7\u30d3\u30eb\u30ba\u30cf\u30f3\u30c9\u30c4\u30ea\u30fc\u201cdevil\u2019s hand tree\u201d \u3068\u547c\u3070\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>The genera <em>Fremontodendron<\/em> and <em>Chiranthodendron<\/em> are sister groups and together constitute the tribe <em>Fremontodendreae<\/em> (Baum et al. 2004). This clade forms a monophyletic group with the subfamilies <em>Malvoideae<\/em> and <em>Bombacoideae<\/em>, although the phylogenetic relationships among these three lineages remain unresolved (Baum et al. 2004; Colli-Silva et al. 2025). Whereas the stamens of <em>Fremontodendron<\/em> are radially symmetrical, those of <em>Chiranthodendron<\/em> are bilaterally symmetrical and resemble a hand, giving rise to the common name \u201cdevil\u2019s hand tree.\u201d<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/2_Fremontodendron_Chiranthodendron.jpeg\"><img decoding=\"async\" loading=\"lazy\" width=\"1600\" height=\"1200\" src=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/2_Fremontodendron_Chiranthodendron.jpeg\" alt=\"\" class=\"wp-image-1525\"\/><\/a><figcaption class=\"wp-element-caption\">Hybrid between Fremontodendron and Chiranthodendron<\/figcaption><\/figure>\n\n\n\n<p>\u30d5\u30ec\u30e2\u30f3\u30c8\u30c7\u30f3\u30c9\u30ed\u30f3\u5c5e<em>Fremontodendron<\/em> \u306f\uff13\u7a2e\u304b\u3089\u306a\u308a\u3001\u30a2\u30e1\u30ea\u30ab\u5408\u8846\u56fd\u306e\u30ab\u30ea\u30d5\u30a9\u30eb\u30cb\u30a2\u5dde\u304a\u3088\u3073\u30a2\u30ea\u30be\u30ca\u5dde\u3001\u306a\u3089\u3073\u306b\u30e1\u30ad\u30b7\u30b3\u306e\u30d0\u30cf\u30fb\u30ab\u30ea\u30d5\u30a9\u30eb\u30cb\u30a2\u306b\u5206\u5e03\u3059\u308b\uff08Kelman 1991\uff09\u3002\u30c7\u30d3\u30eb\u30ba\u30cf\u30f3\u30c9\u30c4\u30ea\u30fc \u3068\u4ea4\u96d1\u3057\uff08Bayer and Kubitzki 2003\uff09\u3001\u5199\u771f\u306e\u3088\u3046\u306b\u30ac\u30af\u7247\u304c\u4e21\u5c5e\u306e\u4e2d\u9593\u7684\u306a\u8272\u3092\u5448\u3057\u3001\u5de6\u53f3\u76f8\u79f0\u306e\u96c4\u305a\u3044\u3092\u5f62\u6210\u3059\u308b\u3002<\/p>\n\n\n\n<p><em>Fremontodendron<\/em> consists of three species distributed in California and Arizona in the United States and in Baja California, Mexico (Kelman 1991). It hybridizes with <em>Chiranthodendron<\/em> (Bayer and Kubitzki 2003), producing flowers in which the sepals show intermediate coloration between the two genera, as shown in the photograph, and the stamens become bilaterally symmetrical.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/3_Chiranthodendron.jpeg\"><img decoding=\"async\" loading=\"lazy\" width=\"1600\" height=\"1200\" src=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/3_Chiranthodendron.jpeg\" alt=\"\" class=\"wp-image-1526\"\/><\/a><figcaption class=\"wp-element-caption\">\u30c7\u30d3\u30eb\u30ba\u30cf\u30f3\u30c9\u30c4\u30ea\u30fc\u306e\u81ea\u751f\u5730&nbsp; The natural habitat of <em>Chiranthodendron pentadactylon<\/em><\/figcaption><\/figure>\n\n\n\n<p>\u30ad\u30e9\u30f3\u30c8\u30c7\u30f3\u30c9\u30ed\u30f3\u5c5e\u306f\u3001\u30c7\u30d3\u30eb\u30ba\u30cf\u30f3\u30c9\u30c4\u30ea\u30fc<em>C. pentadactylon<\/em> \uff11\u7a2e\u304b\u3089\u306a\u308a\u3001\u30e1\u30ad\u30b7\u30b3\u5357\u90e8\u304b\u3089\u30b0\u30a2\u30c6\u30de\u30e9\u306b\u304b\u3051\u3066\u306e\u96f2\u9727\u6797\u306a\u3069\u306b\u70b9\u5728\u3057\u3066\u5206\u5e03\u3057\u3066\u3044\u308b\uff08Hern\u00e1ndez-Langford et al. 2020\uff09\u3002RAD-seq\u89e3\u6790\u306b\u3088\u308a\u3001\u96c6\u56e3\u9593\u306e\u907a\u4f1d\u7684\u5206\u5316\u304c\u5927\u304d\u3044\u3053\u3068\u304c\u793a\u3055\u308c\u3066\u304a\u308a\u3001\u304b\u3064\u3066\u306f\u3088\u308a\u5e83\u7bc4\u56f2\u306b\u5206\u5e03\u3057\u3066\u3044\u305f\u7a2e\u304c\u3001\u7b2c\u56db\u7d00\u306e\u6c17\u5019\u5909\u52d5\u3092\u7d4c\u3066\u3001\u5404\u5730\u306b\u5c0f\u898f\u6a21\u306a\u907a\u5b58\u96c6\u56e3\u3068\u3057\u3066\u6b8b\u5b58\u3057\u305f\u3068\u63a8\u5b9a\u3055\u308c\u3066\u3044\u308b\uff08Hern\u00e1ndez-Langford et al. 2020\uff09\u3002\u5199\u771f\u306f\u3001\u30e1\u30ad\u30b7\u30b3\u5357\u90e8\u30aa\u30a2\u30cf\u30ab\u5dde\u897f\u90e8\u306e\u6a19\u9ad8\u7d042550 m\u306b\u4f4d\u7f6e\u3059\u308b\u96f2\u9727\u6797\u306e\u81ea\u751f\u5730\u3002<\/p>\n\n\n\n<p>The genus <em>Chiranthodendron<\/em> consists of a single species, <em>C. pentadactylon<\/em>, which is distributed discontinuously in cloud forests and related habitats from southern Mexico to Guatemala (Hern\u00e1ndez-Langford et al. 2020). RAD-seq analyses revealed strong genetic differentiation among populations, suggesting that the species was formerly more widespread and that small relict populations persisted in scattered localities following Quaternary climatic changes (Hern\u00e1ndez-Langford et al. 2020). The photograph shows a natural population in a cloud forest at an elevation of approximately 2550 m in western Oaxaca, southern Mexico.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/4_Chiranthodendron.jpeg\"><img decoding=\"async\" loading=\"lazy\" width=\"1600\" height=\"1200\" src=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/4_Chiranthodendron.jpeg\" alt=\"\" class=\"wp-image-1527\"\/><\/a><figcaption class=\"wp-element-caption\">\u6c11\u5bb6\u306e\u5ead\u3067\u683d\u57f9\u3055\u308c\u3066\u3044\u308b\u30c7\u30d3\u30eb\u30ba\u30cf\u30f3\u30c9\u30c4\u30ea\u30fc<br><em>Chiranthodendron<\/em> grown in a private garden<\/figcaption><\/figure>\n\n\n\n<p>\u85ac\u7528\u306b\u5229\u7528\u3055\u308c\u308b\u305f\u3081\u304b\uff08Etkin 1994\uff09\u3001\u6c11\u5bb6\u306e\u5ead\u5148\u306b\u690d\u3048\u3089\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u3042\u308b\u3002\u5199\u771f\u306f\u3001\u81ea\u751f\u5730\u304b\u3089\u7d041 km\u96e2\u308c\u305f\u6c11\u5bb6\u306e\u5ead\u5148\u306b\u690d\u3048\u3089\u308c\u3066\u3044\u305f\u500b\u4f53\u3002\u91ce\u751f\u3067\u306f40 m\u306b\u9054\u3059\u308b\u3053\u3068\u3082\u3042\u308b\u304c\uff08Toledo 1975\uff09\u3001\u3053\u306e\u6728\u306f\u9ad8\u3055\u7d0415 m\u3060\u3063\u305f\u3002<\/p>\n\n\n\n<p>Possibly because it is used medicinally (Etkin 1994), it is sometimes planted in the gardens of private houses. The photograph shows an individual growing in the garden of a house located approximately 1 km from the natural population. Although this species can reach 40 m in height in the wild (Toledo 1975), this tree was approximately 15 m tall.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/5_Chiranthodendron.jpeg\"><img decoding=\"async\" loading=\"lazy\" width=\"1600\" height=\"1200\" src=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/5_Chiranthodendron.jpeg\" alt=\"\" class=\"wp-image-1528\"\/><\/a><figcaption class=\"wp-element-caption\"><strong>\u30c7\u30d3\u30eb\u30ba\u30cf\u30f3\u30c9\u30c4\u30ea\u30fc\u306e\u82b1\u306e\u69cb\u9020<br>Flower structure of <\/strong><em><strong>Chiranthodendron<\/strong><\/em><br><em>Chiranthodendron pentadactylon<\/em>: Photo by Miguel Garc\u00eda Cruz, https:\/\/www.inaturalist.org\/photos\/109313600, CC BY-NC<\/figcaption><\/figure>\n\n\n\n<p>\u30c7\u30d3\u30eb\u30ba\u30cf\u30f3\u30c9\u30c4\u30ea\u30fc\u306e\u82b1\u306f\u3001\u6570\u679a\u306e\u5c0f\u82de\u8449\u306b\u5305\u307e\u308c\u3001\u539a\u304f\u786c\u8cea\u306a\uff15\u679a\u306e\u30ac\u30af\u7247\u3092\u5f62\u6210\u3059\u308b\uff08Bayer and Kubitzki 2003\uff09\u3002\u30ac\u30af\u7247\u306e\u5916\u5074\uff08\u80cc\u5074\uff09\u306f\u8336\u8272\u306e\u77ed\u6bdb\u3067\u8986\u308f\u308c\u3001\u5185\u5074\u306f\u8d64\u8272\u3067\u3001\u57fa\u90e8\u306b\u306f\u5927\u304d\u306a\u9ec4\u8272\u306e\u871c\u817a\u304c\u3042\u308b\u3002\uff15\u672c\u306e\u96c4\u305a\u3044\uff08\u5199\u771f\u306e\uff0a\uff09\u306f\u57fa\u90e8\u3067\u7652\u5408\u3057\u3001\u305d\u308c\u305e\u308c\u7d30\u9577\u304f\u3001\u5148\u7aef\u306b\u5411\u304b\u3063\u3066\u7d30\u304f\u306a\u308b\u3002\u96c4\u305a\u3044\u7b52\u306f\u5de6\u53f3\u76f8\u79f0\u3067\u3001\u846f\u304c\u82b1\u306e\u4e0b\u5074\u306b\u5411\u304b\u3063\u3066\u958b\u88c2\u3059\u308b\u3088\u3046\u306b\u96c4\u305a\u3044\u304c\u3088\u3058\u308c\u3066\u3044\u308b\u3002\u96c4\u305a\u3044\u7b52\u306e\u4e2d\u592e\u304b\u3089\u96cc\u305a\u3044\u304c\u7a81\u51fa\u3057\u3001\u67f1\u982d\u306f\u846f\u306e\u4e0b\u5074\u3078\u4f38\u3073\u308b\u3002<\/p>\n\n\n\n<p>The flowers of <em>Chiranthodendron pentadactylon<\/em> are enclosed by several bracteoles and bear five thick, rigid sepals (Bayer and Kubitzki 2003). The outer (abaxial) surface of the sepals is covered with short brown hairs, whereas the inner surface is red and bears large yellow nectaries at the base. The five stamens are fused at the base, and each is elongated and tapers toward the apex. The staminal tube is bilaterally symmetrical, and the stamens are twisted so that the anthers dehisce toward the lower side of the flower. The pistil protrudes from the center of the staminal tube, and the stigma extends beneath the anthers.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/6_Chiranthodendron.jpeg\"><img decoding=\"async\" loading=\"lazy\" width=\"1600\" height=\"1200\" src=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/6_Chiranthodendron.jpeg\" alt=\"\" class=\"wp-image-1529\"\/><\/a><figcaption class=\"wp-element-caption\"><strong>\u30c7\u30d3\u30eb\u30ba\u30cf\u30f3\u30c9\u30c4\u30ea\u30fc\u306e\u857e\u306e\u5916\u89b3\u3068\u5185\u90e8\u306e\u69d8\u5b50<\/strong><br><strong>External and internal structure of a <em>Chiranthodendron<\/em> flower bud<\/strong><\/figcaption><\/figure>\n\n\n\n<p>\u6307\u306e\u3088\u3046\u306b\u4f38\u3073\u308b\u96c4\u305a\u3044\u306f\u3001\u857e\u306e\u4e2d\u3067\u306f\u3052\u3093\u3053\u3064\u72b6\u306b\u4e38\u307e\u3063\u3066\u304a\u308a\u3001\u958b\u82b1\u306b\u4f34\u3063\u3066\u5916\u5074\u3078\u4f38\u9577\u3059\u308b\u3002<\/p>\n\n\n\n<p>The finger-like stamens are curled into a fist-like shape within the flower bud and elongate outward as the flower opens.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/7_Chiranthodendron.jpeg\"><img decoding=\"async\" loading=\"lazy\" width=\"1600\" height=\"1200\" src=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/7_Chiranthodendron.jpeg\" alt=\"\" class=\"wp-image-1530\"\/><\/a><figcaption class=\"wp-element-caption\"><strong>\u30c7\u30d3\u30eb\u30ba\u30cf\u30f3\u30c9\u30c4\u30ea\u30fc\u306e\u679c\u5b9f\u306e\u5916\u89b3<\/strong><br><strong>Fruit of <em>Chiranthodendron<\/em><\/strong><\/figcaption><\/figure>\n\n\n\n<p>\u786c\u304f\u539a\u3044\u5b50\u623f\u58c1\u304b\u3089\u306a\u308b\u679c\u5b9f\u306f\u3001\u5927\u4eba\u306e\u624b\u3067\u3088\u3046\u3084\u304f\u63e1\u308c\u308b\u307b\u3069\u306e\u5927\u304d\u3055\u306b\u306a\u308a\u3001\u305d\u306e\u5185\u90e8\u306b\u306f\u591a\u6570\u306e\u7a2e\u5b50\u304c\u5165\u3063\u3066\u3044\u308b\u3002<\/p>\n\n\n\n<p>The fruit, composed of a hard and thick ovary wall, becomes large enough to be barely grasped by an adult hand and contains numerous seeds inside.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/8_Chiranthodendron.jpeg\"><img decoding=\"async\" loading=\"lazy\" width=\"1600\" height=\"1200\" src=\"https:\/\/www.nibb.ac.jp\/plantdic\/blog\/wp-content\/uploads\/2026\/05\/8_Chiranthodendron.jpeg\" alt=\"\" class=\"wp-image-1531\"\/><\/a><figcaption class=\"wp-element-caption\"><strong>\u30c7\u30d3\u30eb\u30ba\u30cf\u30f3\u30c9\u30c4\u30ea\u30fc\u306e\u9001\u7c89\u8005<\/strong><br><strong>Pollinators of <em>Chiranthodendron<\/em><\/strong><br><em>Chiranthodendron pentadactylon<\/em>-1: Photo by Sam Wilson, https:\/\/www.inaturalist.org\/photos\/251585038, CC BY-NC<br><em>Chiranthodendron pentadactylon<\/em>-2: Photo by Bernardino Villa B, https:\/\/www.inaturalist.org\/photos\/28370926, CC BY<\/figcaption><\/figure>\n\n\n\n<p>\u30c7\u30d3\u30eb\u30ba\u30cf\u30f3\u30c9\u30c4\u30ea\u30fc\u306f\u3001\u306a\u305c\u3053\u306e\u3088\u3046\u306a\u5947\u5999\u306a\u5f62\u306e\u96c4\u305a\u3044\u3092\u3082\u3064\u306e\u3060\u308d\u3046\u304b\u3002\u8d64\u8272\u3067\u9811\u4e08\u306a\u30ac\u30af\u7247\u3068\u5927\u304d\u306a\u871c\u817a\u3092\u3082\u3064\u3053\u3068\u304b\u3089\u3001\u9ce5\u5a92\u82b1\u3067\u3042\u308b\u3053\u3068\u304c\u4e88\u60f3\u3055\u308c\u308b\u3002\u5b9f\u969b\u3001\u30e1\u30ad\u30b7\u30b3\u5357\u90e8\u30b2\u30ec\u30fc\u30ed\u5dde\u3067\u306e\u91ce\u5916\u89b3\u5bdf\u3067\u306f\u3001\u30e0\u30af\u30c9\u30ea\u30e2\u30c9\u30ad\u985e\uff08\u30a4\u30af\u30ec\u30eb\u30b9\u5c5e <em>Icterus<\/em>\uff09\u3084\u30a2\u30e1\u30ea\u30ab\u30e0\u30b7\u30af\u30a4\u985e\uff08\u30a2\u30e1\u30ea\u30ab\u30e0\u30b7\u30af\u30a4\u79d1 <em>Parulidae<\/em>\uff09\u306a\u3069\u306e\u6b62\u307e\u308a\u6728\u6027\u306e\u4e2d\u578b\u9ce5\u985e\u304c\u8a2a\u82b1\u3059\u308b\u3053\u3068\u304c\u89b3\u5bdf\u3055\u308c\u3066\u3044\u308b\uff08Toledo 1975\uff09\u3002\u307e\u305f\u3001\u30cf\u30c1\u30c9\u30ea\u985e\u3082\u30db\u30d0\u30ea\u30f3\u30b0\u3067\u306f\u306a\u304f\u3001\u82b1\u306b\u6b62\u307e\u3063\u3066\u5438\u871c\u3059\u308b\u69d8\u5b50\u304c\u89b3\u5bdf\u3055\u308c\u3066\u3044\u308b\uff08Toledo 1975\uff09\u3002\uff15\u672c\u306e\u722a\u72b6\u306e\u96c4\u305a\u3044\u306f\u3001\u9001\u7c89\u8005\u3067\u3042\u308b\u9ce5\u3092\u7279\u5b9a\u306e\u65b9\u5411\u304b\u3089\u82b1\u3078\u4fb5\u5165\u3055\u305b\u3001\u9001\u7c89\u8005\u306e\u7279\u5b9a\u90e8\u4f4d\u306b\u82b1\u7c89\u3092\u4ed8\u7740\u3055\u305b\u308b\u3053\u3068\u3067\u3001\u52b9\u7387\u7684\u306a\u9001\u7c89\u3092\u5b9f\u73fe\u3057\u3066\u3044\u308b\u53ef\u80fd\u6027\u304c\u3042\u308b\u3068\u8003\u3048\u3089\u308c\u3066\u3044\u308b\uff08Toledo 1975\uff09\u3002\u96c4\u305a\u3044\u306e\u4e0b\u5074\u306b\u306f\u7a7a\u9593\u304c\u3042\u308b\u305f\u3081\u3001\u9ce5\u304c\u305d\u306e\u4e0b\u5074\u304b\u3089\u4fb5\u5165\u3057\u3001\u982d\u90e8\u3084\u80cc\u5074\u306b\u82b1\u7c89\u304c\u4ed8\u7740\u3059\u308b\u53ef\u80fd\u6027\u304c\u8003\u3048\u3089\u308c\u308b\u304c\u3001\u305d\u306e\u69d8\u5b50\u3092\u76f4\u63a5\u89b3\u5bdf\u3057\u305f\u5831\u544a\u306f\u898b\u3064\u304b\u3089\u306a\u304b\u3063\u305f\u3002<\/p>\n\n\n\n<p>Why does the devil\u2019s hand tree possess such unusually shaped stamens? The presence of large nectaries and red, rigid sepals suggests that the flowers are bird-pollinated. Indeed, field observations in Guerrero, southern Mexico, have recorded visits by perching medium-sized birds such as orioles (<em>Icterus<\/em>) and New World warblers (Parulidae) (Toledo 1975). Hummingbirds have also been observed feeding from the flowers while perched rather than hovering (Toledo 1975). The five claw-like stamens are thought to function by guiding avian pollinators to enter the flower from a particular direction and by placing pollen on specific parts of the pollinator\u2019s body, thereby increasing pollination efficiency (Toledo 1975). Because a space is present beneath the stamens, birds may enter from below and receive pollen on the head or dorsal side of the body; however, no direct observational report of this behavior could be found.<\/p>\n\n\n\n<p><strong>\u53c2\u8003\u6587\u732e  References<\/strong><\/p>\n\n\n\n<p>Baum, D.A., Smith, S.D.W., Yen, A., Alverson, W.S., Nyffeler, R., Whitlock, B.A., and Oldham, R.L. (2004). Phylogenetic relationships of Malvatheca (Bombacoideae and Malvoideae; Malvaceae sensu lato) as inferred from plastid DNA sequences. Am. J. Bot. <em>91<\/em>, 1863\u20131871. https:\/\/doi.org\/10.3732\/AJB.91.11.1863;WGROUP:STRING:PUBLICATION.<\/p>\n\n\n\n<p>Bayer, C., and Kubitzki, K. (2003). Malvaceae. In The Families and Genera of Vascular Plants. (Volume eds.) K. Kubitzki and C. Bayer. Vol. V. Dicotyledons: Malvales, Capparales and Non-betalain Caryophyllales, K. Kubitzki, ed. (Springer), pp. 225\u2013311.<\/p>\n\n\n\n<p>Colli-Silva, M., P\u00e9rez-Escobar, O.A., Ferreira, C.D.M., Costa, M.T.R., Gerace, S., Coutinho, T.S., Yoshikawa, V.N., Antonio-Domingues, H., Hern\u00e1ndez-Guti\u00e9rrez, R., Bovini, M.G., et al. (2025). Taxonomy in the light of incongruence: An updated classification of Malvales and Malvaceae based on phylogenomic data. Taxon <em>74<\/em>, 361\u2013385. https:\/\/doi.org\/10.1002\/TAX.13300;ISSUE:ISSUE:DOI.<\/p>\n\n\n\n<p>Etkin, N.L. (1994). Eating on the Wild Side: The Pharmacologic, Ecologic and Social Implications of Using Noncultigens (Univ. Arizona Press).<\/p>\n\n\n\n<p>Hern\u00e1ndez-Langford, D.G., Siqueiros-Delgado, M.E., and Ru\u00edz-S\u00e1nchez, E. (2020). Nuclear phylogeography of the temperate tree species Chiranthodendron pentadactylon (Malvaceae): Quaternary relicts in Mesoamerican cloud forests. BMC Evol. Biol. <em>20<\/em>, 44-. https:\/\/doi.org\/10.1186\/S12862-020-01605-8\/FIGURES\/8. Kelman, W.M. (1991). A Revision of Fremontodendron (Sterculiaceae). Syst. Bot. <em>16<\/em>, 3\u201320. https:\/\/doi.org\/10.2307\/2418969.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u30d5\u30ec\u30e2\u30f3\u30c8\u30c7\u30f3\u30c9\u30ed\u30f3\u5c5e Fremontodendron \u3068\u30ad\u30e9\u30f3\u30c8\u30c7\u30f3\u30c9\u30ed\u30f3\u5c5e  &hellip; <a href=\"http:\/\/www.nibb.ac.jp\/plantdic\/blog\/?p=1521\">\u7d9a\u304d\u3092\u8aad\u3080 <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[103,158,77,182,205,170,1],"tags":[],"_links":{"self":[{"href":"http:\/\/www.nibb.ac.jp\/plantdic\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1521"}],"collection":[{"href":"http:\/\/www.nibb.ac.jp\/plantdic\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.nibb.ac.jp\/plantdic\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.nibb.ac.jp\/plantdic\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.nibb.ac.jp\/plantdic\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1521"}],"version-history":[{"count":3,"href":"http:\/\/www.nibb.ac.jp\/plantdic\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1521\/revisions"}],"predecessor-version":[{"id":1533,"href":"http:\/\/www.nibb.ac.jp\/plantdic\/blog\/index.php?rest_route=\/wp\/v2\/posts\/1521\/revisions\/1533"}],"wp:attachment":[{"href":"http:\/\/www.nibb.ac.jp\/plantdic\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1521"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.nibb.ac.jp\/plantdic\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1521"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.nibb.ac.jp\/plantdic\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1521"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}