{"id":2344,"date":"2025-06-30T07:24:34","date_gmt":"2025-06-30T07:24:34","guid":{"rendered":"https:\/\/www.zuurstofplanten.net\/?page_id=2344"},"modified":"2025-06-30T07:24:39","modified_gmt":"2025-06-30T07:24:39","slug":"alligator-vlag-thalia-dealbata","status":"publish","type":"page","link":"https:\/\/www.zuurstofplanten.net\/en\/moerasplanten\/alligator-vlag-thalia-dealbata\/","title":{"rendered":"Alligator flag (Thalia dealbata)"},"content":{"rendered":"<div data-elementor-type=\"wp-page\" data-elementor-id=\"2344\" class=\"elementor elementor-2344\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6961262 e-flex e-con-boxed e-con e-parent\" data-id=\"6961262\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0ee7c1d elementor-widget elementor-widget-heading\" data-id=\"0ee7c1d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Alligator flag (Thalia dealbata)<\/h1>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d87d3d7 elementor-widget elementor-widget-breadcrumbs\" data-id=\"d87d3d7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"breadcrumbs.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<p id=\"breadcrumbs\"><span><span><a href=\"https:\/\/www.zuurstofplanten.net\/en\/\">Home<\/a><\/span><\/span><\/p>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1692d18 elementor-widget elementor-widget-text-editor\" data-id=\"1692d18\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><strong>TL;DR<\/strong> | <span style=\"font-weight: 400;\">Alligator flag (Thalia dealbata) is an exotic-looking marsh plant with purple flower clusters and decorative blue-green foliage. This graceful species is hardy and perfect for pond edges and marsh zones. This species can grow up to 150 cm tall and usually flowers between July and September. With its sturdy structure and striking appearance, Thalia dealbata is a low-maintenance plant that immediately attracts attention in natural ponds. Order Thalia dealbata easily via <strong><a href=\"https:\/\/vijvermeester.nl\/thalia-dealbata.html?utm_source=affiliate&amp;utm_medium=partner&amp;utm_campaign=zuurstofplanten_net&amp;utm_content=thalia-dealbata\">our partner Vijvermeester.co.uk<\/a><\/strong><\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-f8956d8 e-flex e-con-boxed e-con e-parent\" data-id=\"f8956d8\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8ca09eb elementor-widget elementor-widget-heading\" data-id=\"8ca09eb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Thalia dealbata (Alligator flag) | Exotic Marsh Plant with Purple Flowering<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-a9d5a1b e-grid e-con-full e-con e-child\" data-id=\"a9d5a1b\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-83dfd34 elementor-widget elementor-widget-text-editor\" data-id=\"83dfd34\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Thalia dealbata, better known as Alligator flag, is a striking aquatic plant native to the swamps of the southeastern United States. This plant impresses with its stately leaves, striking flowers and graceful growth habit. Although its exotic appearance suggests otherwise, Thalia dealbata is surprisingly hardy and well suited to the Dutch climate. Suitable for use along pond edges, in wet areas or as a free-standing plant in a spacious water trough or planter.<\/span><\/p><p>Order easily via our partner: <a href=\"https:\/\/vijvermeester.nl\/thalia-dealbata.html?utm_source=affiliate&amp;utm_medium=partner&amp;utm_campaign=zuurstofplanten_net&amp;utm_content=thalia-dealbata\"><strong>Thalia dealbata <\/strong><strong>ordering from Vijvermeester<\/strong><strong>.<\/strong><strong>\u00a0<\/strong><\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ab1e7f0 elementor-cta--skin-classic elementor-animated-content elementor-bg-transform elementor-bg-transform-zoom-in elementor-widget elementor-widget-call-to-action\" data-id=\"ab1e7f0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"call-to-action.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<a class=\"elementor-cta\" href=\"https:\/\/vijvermeester.nl\/thalia-dealbata.html?utm_source=affiliate&#038;utm_medium=partner&#038;utm_campaign=zuurstofplanten_net&#038;utm_content=thalia-dealbata\" rel=\"nofollow\">\n\t\t\t\t\t<div class=\"elementor-cta__bg-wrapper\">\n\t\t\t\t<div class=\"elementor-cta__bg elementor-bg\" style=\"background-image: url(https:\/\/www.zuurstofplanten.net\/wp-content\/uploads\/2025\/06\/Alligator-vlag-Thalia-dealbata-768x1024.jpg);\" role=\"img\" aria-label=\"Alligator flag (Thalia dealbata)\"><\/div>\n\t\t\t\t<div class=\"elementor-cta__bg-overlay\"><\/div>\n\t\t\t<\/div>\n\t\t\t\t\t\t\t<div class=\"elementor-cta__content\">\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<h2 class=\"elementor-cta__title elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tBuy Thalia dealbata?\t\t\t\t\t<\/h2>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__description elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t\tThalia dealbata is for sale through De Vijvermeester's webshop. Here you can find beautiful bunches of high quality.\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-cta__button-wrapper elementor-cta__content-item elementor-content-item\">\n\t\t\t\t\t<span class=\"elementor-cta__button elementor-button elementor-size-\">\n\t\t\t\t\t\tClick for the Vijvermeester's webshop\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-735d50b elementor-widget elementor-widget-heading\" data-id=\"735d50b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Features of Thalia dealbata<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2a7e3be elementor-widget elementor-widget-text-editor\" data-id=\"2a7e3be\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Thalia dealbata belongs to the family Marantaceae. The plant grows from a rhizome and develops firm, blue-green leaves resembling fins. Its upright petioles can grow up to 150 cm tall, adding an architectural element to the pond.<\/span><\/p><p><span style=\"font-weight: 400;\">In the summer months, the striking flowers appear on long stems. The inflorescence consists of small purple flowers arranged together in dense spikes. The compact flower clusters stand out beautifully against the plant's robust, blue-green foliage. Flowering usually occurs between July and September.<\/span><\/p><p><span style=\"font-weight: 400;\">The flowers of Thalia dealbata have a special pollination mechanism in which small insects are sometimes temporarily trapped inside the flower to promote pollination.<\/span><\/p><p><b>Key features at a glance:<\/b><\/p><ul><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Height: 100 - 150 cm<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Flowering time: July to September<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Flower colour: Purple<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Leaf colour: Blue-green<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Position: Sun<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Planting depth: 5 to 25 cm below the water surface (sometimes up to 40 cm in large, frost-free ponds)<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Hardy: Yes, down to about -7\u00b0C; in more severe frosts, additional protection or a deeper planting position is required<\/span><\/li><li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Evergreen: No<\/span><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6393227 elementor-widget elementor-widget-heading\" data-id=\"6393227\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Location and planting<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d5839b3 elementor-widget elementor-widget-text-editor\" data-id=\"d5839b3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Thalia dealbata does best in a sunny location with wet, nutrient-rich soil. It prefers to grow in the riparian zone of ponds, where the roots are in the water but the leaves protrude above the surface. The ideal planting depth is between 5 to 25 centimetres below the water surface. The Alligator flag also works well in a large tub or plant basket.<\/span><\/p><p><span style=\"font-weight: 400;\">When planting, it is important to provide a good soil layer at least 10 cm thick. Suitable materials include pond soil, clay, loam or pond substrate. Preferably use a pond basket with cover material such as lava pebbles to keep the plant in place.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d5114ec elementor-widget elementor-widget-heading\" data-id=\"d5114ec\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Growth and maintenance<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-0b13561 elementor-widget elementor-widget-text-editor\" data-id=\"0b13561\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Although Thalia dealbata has an exotic look, the plant requires little maintenance. Once autumn arrives, the visible parts of the plant disappear naturally. These can be cut off to prevent them from ending up in the water and adversely affecting water quality.<\/span><\/p><p><span style=\"font-weight: 400;\">The plant overwinters via its rhizome and re-sprouts in spring. Fertilisation is usually not necessary. In nutrient-rich ponds, the plant draws sufficient nutrients from its surroundings. Preferably do not use fertiliser near open pond water to prevent excessive algae formation.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fea9bc1 elementor-widget elementor-widget-heading\" data-id=\"fea9bc1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Application in the pond\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a11b108 elementor-widget elementor-widget-text-editor\" data-id=\"a11b108\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Thalia dealbata is an excellent choice for the ecological pond edge. With its height and robust stems, the plant offers structure and visual layering. Its broad leaf cover shields the water from direct sunlight, lowering the temperature and inhibiting algae growth. The flowers attract various insects, including butterflies and bees, contributing to biodiversity around the pond. In addition, the plant provides hiding places for frogs and other pond inhabitants.\u00a0<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-52e8dbc elementor-widget elementor-widget-heading\" data-id=\"52e8dbc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Frequently asked questions about Thalia dealbata<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2539856 elementor-widget elementor-widget-text-editor\" data-id=\"2539856\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Arrowweed fits perfectly into ponds designed with ecology in mind and a natural look. Preferably place the plant in a pond basket or directly in the bottom in a place where the leaves can protrude well above the water.<\/span><\/p><p><span style=\"font-weight: 400;\">Thanks to its graceful appearance and long flowering period, Arrowweed is also an attractive addition in ornamental ponds with marsh zones or riparian edges.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-901ed64 elementor-widget elementor-widget-heading\" data-id=\"901ed64\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Is Thalia dealbata hardy in the Netherlands?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-23d78b9 elementor-widget elementor-widget-text-editor\" data-id=\"23d78b9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Yes, this plant is completely hardy, if properly rooted before the frost period.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-44bea93 elementor-widget elementor-widget-heading\" data-id=\"44bea93\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What should I pay attention to when planting?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-304728b elementor-widget elementor-widget-text-editor\" data-id=\"304728b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Provide nutrient-rich, wet soil and plenty of sunlight.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-60a99dc elementor-widget elementor-widget-heading\" data-id=\"60a99dc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Should I prune Thalia dealbata?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-393d4c3 elementor-widget elementor-widget-text-editor\" data-id=\"393d4c3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Only in autumn to remove dead parts.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fce9ba4 elementor-widget elementor-widget-heading\" data-id=\"fce9ba4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Buy Thalia dealbata<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d375901 elementor-widget elementor-widget-image\" data-id=\"d375901\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"225\" height=\"300\" src=\"https:\/\/www.zuurstofplanten.net\/wp-content\/uploads\/2025\/06\/Alligator-vlag-Thalia-dealbata-225x300.jpg\" class=\"attachment-medium size-medium wp-image-2346\" alt=\"Alligator vlag (Thalia dealbata)\" srcset=\"https:\/\/www.zuurstofplanten.net\/wp-content\/uploads\/2025\/06\/Alligator-vlag-Thalia-dealbata-225x300.jpg 225w, https:\/\/www.zuurstofplanten.net\/wp-content\/uploads\/2025\/06\/Alligator-vlag-Thalia-dealbata-768x1024.jpg 768w, https:\/\/www.zuurstofplanten.net\/wp-content\/uploads\/2025\/06\/Alligator-vlag-Thalia-dealbata-9x12.jpg 9w, https:\/\/www.zuurstofplanten.net\/wp-content\/uploads\/2025\/06\/Alligator-vlag-Thalia-dealbata.jpg 900w\" sizes=\"(max-width: 225px) 100vw, 225px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5d3e0ae elementor-widget elementor-widget-text-editor\" data-id=\"5d3e0ae\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"font-weight: 400;\">Blood Sorrel can be ordered through our sales 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This graceful species is hardy and perfect for pond edges and marsh zones. This species can grow up to 150 cm tall and usually flowers between July and September. Due to its sturdy structure and striking appearance [...]<\/p>","protected":false},"author":5,"featured_media":0,"parent":637,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"elementor_header_footer","meta":{"_acf_changed":false,"iawp_total_views":212,"footnotes":""},"class_list":["post-2344","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Alligator vlag (Thalia dealbata) - Zuurstofplanten.net<\/title>\n<meta name=\"description\" content=\"Thalia dealbata (de Alligator vlag) is een sterke oeverplant met opvallende paarse bloei en sierlijk blauwgroen blad.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.zuurstofplanten.net\/en\/moerasplanten\/alligator-vlag-thalia-dealbata\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Alligator vlag (Thalia dealbata) - 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