{"id":6994,"date":"2017-04-06T10:35:14","date_gmt":"2017-04-06T08:35:14","guid":{"rendered":"https:\/\/afabego.fr\/?page_id=6994"},"modified":"2022-01-31T23:48:06","modified_gmt":"2022-01-31T22:48:06","slug":"les-feuilles","status":"publish","type":"page","link":"https:\/\/afabego.fr\/en\/culture\/un-peu-de-botanique\/les-feuilles\/","title":{"rendered":"A little botany: Leaves"},"content":{"rendered":"<div class=\"vc_row wpb_row vc_row-fluid\">\n            \t\t\t\t\t\t\t<div class=\"gf-container container\">\n\t\t\t\t\t\t\t\t<div class=\"wpb_column vc_column_container vc_col-sm-12\"><div class=\"vc_column-inner\"><div class=\"wpb_wrapper\">\n\t<div class=\"wpb_text_column wpb_content_element\" >\n\t\t<div class=\"wpb_wrapper\">\n\t\t\t<h3>Leaf characters that determine which section a Begonia belongs to:<\/h3>\n<h3>Arrangement<\/h3>\n<h4>Alternate leaves<\/h4>\n<p>The most common case in the genus <em>Begonia.<\/em><\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-foliosa.jpg\"><em>B. foliosa<\/em><\/a>\u00a0Kunth \/ section<em>\u00a0Lepsia<\/em>\u00a0\/ Colombia, Venezuela, Ecuador: alternate leaves<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Opposite leaves<\/h4>\n<p>Rarer in the genus <em>Begonia.<\/em><\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-subthorpioides.jpg\"><em>B. sibthorpioides<\/em><\/a>\u00a0Ridley \/ section\u00a0<em>Heeringia<\/em>\u00a0\/ Malaysia \u2013 Thailand: the upper leaves of this\u00a0<em>Begonia<\/em>\u00a0are opposite<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Distichous leaves, close together<\/h4>\n<p>Arranged in two vertical rows in the same plane; this character is most often found on creeping plants.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-thelmae.jpg\"><em>B. thelmae<\/em><\/a>\u00a0L.B. Smith &amp; D.C. Wasshausen \/ section undetermined \/ Brazil: distichous leaves<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Whorled leaves<\/h4>\n<p>Inserted at the same level, in a circle, in the same horizontal plane: found on acaulescent (stemless) plants.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-adenopoda.jpg\"><em>B. adenopoda<\/em><\/a>\u00a0Lemaire \/ section\u00a0<em>Lauchea<\/em>\u00a0\/ Myanmar: plant with whorled leaves<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Number<\/h3>\n<h4>1 or 2 leaves<\/h4>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-sambiranensis.jpg\"><em>B. sambiranensis<\/em><\/a>\u00a0Humbert \/ section\u00a0<em>Quadrilobaria<\/em>\u00a0\/ Madagascar: single-leaved plant<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>More than 2 leaves<\/h4>\n<p>Most begonias.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-minutifolia.jpg\"><em>B. minutifolia<\/em><\/a>\u00a0N. Hall\u00e9 \/ section\u00a0<em>Filicibegonia<\/em>\u00a0\/ Gabon (endemic): numerous leaves<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Position in relation to the petiole<\/h3>\n<h4>Straight leaves<\/h4>\n<p>When the main vein is exactly in line with the petiole.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-molleri.jpg\"><em>B. molleri<\/em><\/a>\u00a0Warburg \/ section\u00a0<em>Tetraphila<\/em>\u00a0\/ S\u00e3o Tom\u00e9: straight leaf, the main vein is in line with the petiole<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Oblique leaves<\/h4>\n<p>When the main vein makes an angle of about 45\u00b0 with the petiole.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-sinuata.jpg\"><em>B. sinuata<\/em><\/a>\u00a0Wallich \/ section\u00a0<em>Parvibegonia<\/em> \/ Malaysia: oblique leaf, the petiole makes a 45\u00b0 angle with the main vein<\/li>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-horticola.jpg\"><em>B. horticola<\/em><\/a>\u00a0Irmscher \/ section\u00a0<em>Tetraphila<\/em>\u00a0\/ Central Africa: oblique leaf, the petiole makes a 45\u00b0 angle with the main vein<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Transverse leaves<\/h4>\n<p>When the main vein is at (or nearly at) a right angle to the petiole.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-formosana.jpg\"><em>B. formosana<\/em><\/a>\u00a0Masamune \/ section\u00a0<em>Platycentrum<\/em>\u00a0\/ Taiwan: transverse leaf, the petiole is perpendicular to the blade<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Symmetry<\/h3>\n<h4>Symmetrical blade<\/h4>\n<p>Rare in the genus <em>Begonia.<\/em><\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-horticola-2.jpg\"><em>B. horticola<\/em>\u00a0<\/a>Irmscher \/ section\u00a0<em>Tetraphila<\/em>\u00a0\/ Congo \u2013 Zaire \u2013 Uganda: almost symmetrical blade<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Asymmetrical blade<\/h4>\n<p>This is the most common case.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-silletensis.jpg\"><em>B. silletensis<\/em><\/a>\u00a0CB Clarke subsp.\u00a0<em>mengyangensis<\/em>\u00a0Tebbitt \/ section<em>\u00a0Sphenanthera<\/em>\u00a0\/ China: strongly asymmetrical blade<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Peltate or not<\/h3>\n<h4>Peltate leaf<\/h4>\n<p>The petiole is attached within the blade.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-microsperma.jpg\"><em>B. microsperma<\/em>\u00a0<\/a>Warburg \/ section\u00a0<em>Loasibegonia<\/em>\u00a0\/ Cameroon: peltate leaf<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Non-peltate leaf<\/h4>\n<p>The petiole is attached at the edge of the blade.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-garagarana.jpg\"><em>B. garagarana<\/em><\/a>\u00a0C de Candolle \/ section\u00a0<em>Gireoudia<\/em>\u00a0\/ Panama: non-peltate leaf<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Divisions<\/h3>\n<h4>Simple or entire leaf<\/h4>\n<p>The leaf has no divisions.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-mariannensis.jpg\"><em>B. mariannensis<\/em>\u00a0<\/a>\u00a0Wasshausen &amp; McClellan \/ section<em>\u00a0Knesebeckia<\/em>\u00a0\/ West Indies (Trinidad) \/ entire leaf<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Palmately lobed leaf<\/h4>\n<p>It is divided radially into lobes (divisions not exceeding half the blade), arranged like the fingers of a hand<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-sp.-Chine.jpg\">B. China sp.<\/a>\u00a0\/ section\u00a0<em>Diploclinium<\/em>\u00a0\/ China: palmately lobed leaves<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Palmatifid leaf<\/h4>\n<p>The same, but the divisions reach halfway into the blade \/ a rare character in the genus <em>Begonia.<\/em><\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"ttp:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-antsiranensis.jpg\"><em>B. antsiranensis<\/em><\/a>\u00a0Aymonin &amp; Bosser \/ section\u00a0<em>Quadrilobaria<\/em>\u00a0\/ Madagascar (endemic): palmatifid blade<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Palmatisect leaf<\/h4>\n<p>The divisions reach almost to the base of the blade.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-diadema.jpg\"><em>B. diadema<\/em><\/a>\u00a0Linden \/ section\u00a0<em>Platycentrum<\/em>\u00a0\/ Malaysia \u2013 Borneo: palmatisect leaf<\/li>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-mananjebensis.jpg\"><em>B. mananjebensis<\/em><\/a>\u00a0Humbert \/ section\u00a0<em>Quadrilobaria<\/em>\u00a0\/ Madagascar: palmatisect leaf<\/li>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-pedatifida.jpg\"><em>B. pedatifida<\/em><\/a>\u00a0L\u00e9veill\u00e9 \/ section\u00a0<em>Platycentrum<\/em>\u00a0\/ China: palmatisect leaf<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Pinnatifid leaf<\/h4>\n<p>Not palmate but pinnate (leaflets arranged like the barbs of a feather on either side of the rachis); the divisions do not reach the midrib.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-aspleniifolia.jpg\"><em>B. aspleniifolia<\/em><\/a>\u00a0Hooker f. \/ section\u00a0<em>Filicibegonia<\/em>\u00a0\/ endemic to Gabon: pinnatisect blade: pinnatifid, with divisions exceeding half the blade<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Bipinnatifid or even more divided leaf<\/h4>\n<p>When the pinnatifid divisions are themselves pinnatifid.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-bipinnatifida.jpg\"><em>B. bipinnatifida<\/em><\/a>\u00a0JJ Smith \/ section\u00a0<em>Petermannia<\/em>\u00a0\/ New Guinea: bipinnatifid leaf<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Compound leaf<\/h4>\n<p>The blade is divided into several leaflets, each with its own petiole; a rare character in the genus <em>Begonia.<\/em><\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-hemsleyana.jpg\"><em>B. hemsleyana<\/em><\/a>\u00a0J.D. Hooker \/ section<em>\u00a0Platycentrum<\/em>\u00a0\/ China: palmately compound leaf<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Filiform leaf<\/h4>\n<p>The blade is segmented.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-sp.-Madagascar-1.jpg\">B. sp. Madagascar<\/a>\u00a0\/ section\u00a0<em>Erminea<\/em>\u00a0\/ endemic to Madagascar: filiform leaf in twice-divided segments<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Veins<\/h3>\n<h4>Palmate veins<\/h4>\n<p>Arranged like the fingers of a hand.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-sericoneura.jpg\"><em>B. sericoneura<\/em><\/a>\u00a0Liebmann \/ section\u00a0<em>Gireoudia<\/em>\u00a0\/ Central America: palmate veins<\/li>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-beccarii.jpg\"><em>B. beccarii<\/em><\/a>\u00a0Warburg \/ section\u00a0<em>Diploclinium<\/em>\u00a0\/ Malaysia (Borneo: Sarawak): palmate veins<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Palmate-pinnate veins<\/h4>\n<p>The first veins are palmate and the following ones pinnate along the main vein.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-humilis.jpg\"><em>B. humilis<\/em><\/a>\u00a0Dryander \/ section\u00a0<em>Doratometra<\/em>\u00a0\/ From the West Indies to Peru and Brazil: palmate-pinnate veins<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Pinnate veins<\/h4>\n<p>The veins are arranged like the barbs of a feather.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-auriculata.jpg\"><em>B. auriculata<\/em><\/a>\u00a0JD Hooker \/ section\u00a0<em>Filicibegonia<\/em> \/ Gabon: pinnate veins<\/li>\n<li><em>B. ulmifolia<\/em>\u00a0Willdenow \/ section\u00a0<em>Donaldia<\/em>\u00a0\/ Guiana Shield: pinnate veins<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Indumentum<\/h3>\n<p>(Characters not visible to the naked eye)<\/p>\n<ul>\n<li>Presence on the leaves of more or less circular or star-shaped \u201cscales\u201d called <strong>trichomes<\/strong>\u00a0: plants of sections\u00a0<em>Baccabegonia<\/em>,\u00a0<em>Squamibegonia<\/em> and Tetraphila and a few species of section Loasibegonia.<\/li>\n<li>Presence of star-shaped \u201chairs\u201d: on a few Asian and South American species of sections <em>Knesebeckia<\/em>\u00a0and\u00a0<em>Pritzelia.<\/em><\/li>\n<\/ul>\n<h3>Characters that do not determine membership of a section:<\/h3>\n<h3>Petiole<\/h3>\n<h4>No petiole<\/h4>\n<p>Sessile leaves.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-polygonoides.jpg\"><em>B. polygonoides<\/em><\/a>\u00a0JD Hooker \/ section\u00a0<em>Tetraphila<\/em>\u00a0\/ Tropical Africa: almost sessile leaves<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Glabrous or hairy<\/h4>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-picturata.jpg\"><em>B. picturata<\/em><\/a>\u00a0Y. Liu, S-M Ku &amp; Ch-I Peng \/ section Coelocentrum \/ China (Guangxi): densely hairy petiole<\/li>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-roxburghii.jpg\"><em>B. roxburghii<\/em><\/a>\u00a0A. de Candolle \/ section Sphenanthera \/ India \u2013 Myanmar: glabrous petiole<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Shape of the blade<\/h3>\n<h4>Cordate<\/h4>\n<p>Heart-shaped.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-aliceclarkiae.jpg\"><em>B. aliceclarckiae<\/em><\/a>\u00a0Ziesenhenne \/ section\u00a0<em>Weibachia<\/em>\u00a0\/ Mexico: cordate blade<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Auriculate<\/h4>\n<p>Has an \u201cauricle\u201d (small ear) on the wider side of the blade, at its base.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-sp.-nov.-Gabon.jpg\">Gabon sp. nov<\/a>\u00a0\/ asymmetrical blade, with a well-formed auricle on one side of the base and cordate on the other<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Obtuse at the base or apex<\/h4>\n<p>Rounded at the tip or base.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><em>B. kisuluana<\/em>\u00a0B\u00fcttner \/ section<em>\u00a0Tetraphila<\/em>\u00a0\/ from Nigeria to Angola: leaves obtuse at the apex<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Lanceolate<\/h4>\n<p>Lance-shaped (widest part at the base).<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-henrilaportei.jpg\"><em>B. henrilaportei<\/em><\/a>\u00a0Scherberich &amp; Duruisseau \/ section\u00a0<em>Quadrilobaria<\/em>\u00a0\/ Madagascar: linear-lanceolate blade, almost symmetrical, with pinnate veins, incised.<\/li>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-komoensis.jpg\"><em>B. komoensis<\/em><\/a>\u00a0Irmscher \/ section\u00a0<em>Tetraphila<\/em>\u00a0\/ Equatorial Africa: lanceolate blade<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Cuneate base<\/h4>\n<p>Wedge- or triangle-shaped.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-maynensis.jpg\"><em>B. maynensis<\/em><\/a>\u00a0A de Candolle \/ section\u00a0<em>Knesebeckia<\/em>\u00a0\/ Ecuador \u2013 Peru: lanceolate blade with a cuneate base<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Circular or subcircular<\/h4>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-atroglandulosa.jpg\"><em>B. atroglandulosa<\/em><\/a>\u00a0 Sosef \/ section\u00a0<em>Loasibegonia<\/em>\u00a0\/ endemic to Gabon: almost circular blade<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Falcate<\/h4>\n<p>Sickle-shaped.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-poculifera.jpg\"><em>B. poculifera<\/em><\/a>\u00a0JD Hooker \/ section\u00a0<em>Squamibegonia<\/em>\u00a0\/ Tropical Africa: falcate blade<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Surface of the blade<\/h3>\n<h4>Glabrous<\/h4>\n<p>Smooth blade, without hairs.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-loranthoides-subsp.-loranthoides.jpg\"><em>B. loranthoides<\/em>\u00a0var.\u00a0<em>loranthoides\u00a0<\/em><\/a>JD Hooker \u00a0\/ section\u00a0<em>Tetraphila<\/em>\u00a0\/ Equatorial Africa: upper surface of the blade glabrous and smooth<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Pubescent or hirsute<\/h4>\n<p>Blade with dense or sparse hairs, short or long, spine-like (spiculiform or spiculate), in various colours.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-sizemoreae.jpg\"><em>B. sizemoreae<\/em><\/a>\u00a0R. Kiew \/ section\u00a0<em>Platycentrum<\/em>\u00a0\/ Vietnam: upper surface of the blade with large white hairs<\/li>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-limprichtii.jpg\"><em>B. limprichtii<\/em><\/a>\u00a0Irmscher \/ section\u00a0<em>Platycentrum<\/em>\u00a0\/ China: hairy blade<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Bullate<\/h4>\n<p>Blistered surface.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-susaniae.jpg\"><em>B. susaniae<\/em><\/a>\u00a0Sosef \/ section<em>\u00a0Scutobegonia<\/em>\u00a0\/ Cameroon \u2013 Gabon: bullate blade, each \u201cblister\u201d bearing a spiculiform hair<\/li>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-bullatifolia.jpg\"><em>B. bullatifolia<\/em><\/a>\u00a0Kollmann \/ section\u00a0<em>Knesebeckia<\/em>\u00a0\/ Brazil (Esp\u00edrito Santo): bullate blade, without hairs<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3>Margin<\/h3>\n<h4>Entire<\/h4>\n<p>The margin has no incisions.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-erectocaulis.jpg\"><em>B. erectocaulis<\/em><\/a>\u00a0Sosef \/ section\u00a0<em>Scutobegonia<\/em>\u00a0\/ Gabon: entire margin<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Dentate<\/h4>\n<p>Margin cut into teeth that are more or less large and more or less regular; it is called serrate when finely toothed.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-augustinei.jpg\"><em>B. augustinei<\/em><\/a>\u00a0Hemsley \/ section\u00a0<em>Platycentrum<\/em>\u00a0\/ China: serrate margin, with a longer tooth where the veins reach the margin<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Crenate<\/h4>\n<p>Margin edged with rounded teeth.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-furfuracea.jpg\"><em>B. furfuracea<\/em><\/a>\u00a0JD Hooker \/ section\u00a0<em>Tetraphila<\/em>\u00a0\/ Cameroon \u2013 Bioko: leaf with a crenate margin<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h4>Ciliate<\/h4>\n<p>Margin with more or less long hairs.<\/p>\n<ul>\n<li style=\"list-style-type: none;\">\n<ul>\n<li><a href=\"https:\/\/afabego.fr\/wp-content\/uploads\/2017\/04\/B.-jingxiensis-var.-mashanica.jpg\"><em>B. jingxiensis<\/em><\/a>\u00a0D. Fang &amp; Y.G. Wei var.\u00a0<em>mashanica<\/em>\u00a0\/ section\u00a0<em>Diploclinium<\/em>\u00a0\/ China (Guangxi): ciliate margin<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Bibliography<\/h3>\n<ul>\n<li>The sections of<em>\u00a0Begonia<\/em>\u00a0\/ J. Doorenbos \u2013 M.S.M. Sosef \u2013 J.J.F.E. de Wilde<\/li>\n<li>Begonias of Peninsular Malaysia \/ Ruth Kiew<\/li>\n<li>\n<p align=\"LEFT\">BEGONIACEAE, Edition 2 \/ Part I : Annotated Species List \/ Jack Golding<\/p>\n<\/li>\n<\/ul>\n\n\t\t<\/div>\n\t<\/div>\n<\/div><\/div><\/div>\t\t\t\t\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>","protected":false},"excerpt":{"rendered":"Caract\u00e8res des feuilles d\u00e9terminants pour l\u2019appartenance d\u2019un Begonia \u00e0 une section : Disposition Feuilles alternes Cas le plus fr\u00e9quent dans le genre Begonia. B. foliosa\u00a0Kunth \/ section\u00a0Lepsia\u00a0\/ Colombie, V\u00e9n\u00e9zuela, \u00c9quateur : feuilles alternes Feuilles oppos\u00e9es Plus rare dans le genre Begonia. B. sibthorpioides\u00a0Ridley \/ section\u00a0Heeringia\u00a0\/ Malaisie \u2013 Tha\u00eflande : les feuilles sup\u00e9rieures de ce\u00a0Begonia\u00a0sont oppos\u00e9es [...]","protected":false},"author":2,"featured_media":0,"parent":5477,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-6994","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/afabego.fr\/en\/wp-json\/wp\/v2\/pages\/6994","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/afabego.fr\/en\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/afabego.fr\/en\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/afabego.fr\/en\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/afabego.fr\/en\/wp-json\/wp\/v2\/comments?post=6994"}],"version-history":[{"count":132,"href":"https:\/\/afabego.fr\/en\/wp-json\/wp\/v2\/pages\/6994\/revisions"}],"predecessor-version":[{"id":10642,"href":"https:\/\/afabego.fr\/en\/wp-json\/wp\/v2\/pages\/6994\/revisions\/10642"}],"up":[{"embeddable":true,"href":"https:\/\/afabego.fr\/en\/wp-json\/wp\/v2\/pages\/5477"}],"wp:attachment":[{"href":"https:\/\/afabego.fr\/en\/wp-json\/wp\/v2\/media?parent=6994"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}