{"id":12075,"date":"2020-11-10T10:07:26","date_gmt":"2020-11-10T10:07:26","guid":{"rendered":"https:\/\/www.northafricatrees.org\/species\/calligonum-calvescens-maire\/"},"modified":"2021-02-03T12:50:36","modified_gmt":"2021-02-03T12:50:36","slug":"calligonum-calvescens-maire","status":"publish","type":"species","link":"https:\/\/www.northafricatrees.org\/en\/species\/calligonum-calvescens-maire\/","title":{"rendered":"Calligonum calvescens Maire"},"content":{"rendered":"<p>Shrub up to 2.5 m in height, highly branched, sometimes tufted, with branches of the current year green, glaucescent during droughts, \u00b1 striated on the lower parts, slightly or not branched at all, solitary or geminate, flexuous, elongated (up to 40 cm in length); old branches with suberous bark, white and fissured, tortuous. Leaves ephemeral, subulate, 0.5-1 mm in length, purple green. Flowers in groups of 1-4, with pedicel articulated halfway below. Perianth attenuated at the base, with 4 green tepals and white margin, with a green thickening on the dorsal side, persistent and reflexed in the fruit. Stamens 10, anthers pink. Ovary with 4 purple styles and capitate stigmas. Achenes ochre, 7-8 \u00d7 3-3.5 mm, with 4 series of fragile, yellow-ochre hairs (up to 8 mm in length), usually 1-2 times dichotomous above halfway along their length; oblong-fusiform, subrostrate, with 4 narrow valleculae, glabrous and grey; wide naked ribs. Lateral hairs patent, winged at the base, with concrescent wings which form a \u00b1 continuous membranous crest. Seeds oblong.<\/p>\n","protected":false},"featured_media":0,"template":"","short_name":"Calligonum calvescens","name_html":"<strong>Calligonum calvescens<\/strong> Maire","short_description":"","common_names":"","other_name":"<em>Ara<\/em>.: Arich","flowering":"April to May.","fruiting":"1-2 months after Flowering.","habitat":"Dune slopes.","distribution":"SE part of the Oriental Grand Erg, in Algeria and Tunisia.","observations":"","conservation":"Rare species of a limited Distribution. It is not considered threatened, but further research is recommended. Currently, it has not been assessed at a global level in the <em>IUCN Red List of Threatened Species<\/em>. In Algeria it is included in the List of protected non cultivated flora (Executive Decree 12-03 on 4-Jan-2012).","genus":false,"images":false,"map_legend":"","kml":false,"zone_1":"[\" 9.569091800000001,30.2472046\",\" 9.8681872,30.416739\",\" 9.9536132,30.5338766\",\" 9.9934145,30.6980311\",\" 10.0003358,30.8606981\",\" 9.9715284,30.9621489\",\" 9.909667900000001,31.1211458\",\" 9.761648900000001,31.351245\",\" 9.6130371,31.5200201\",\" 9.4992888,31.5774725\",\" 9.357872199999999,31.6254667\",\" 9.2010498,31.6253212\",\" 9.064962100000001,31.5388005\",\" 8.9456177,31.3911576\",\" 8.926367000000001,31.2308729\",\" 8.929242800000001,31.0683301\",\" 8.934631400000001,30.5291449\",\" 8.989733100000001,30.0752145\",\" 9.013049499999999,30.0413683\",\" 9.050089099999999,30.0214896\",\" 9.105606099999999,30.010247\",\" 9.1462562,30.0233924\",\" 9.201347200000001,30.0543551\",\" 9.2360375,30.1054944\",\" 9.3329415,30.1572016\",\" 9.569091800000001,30.2472046\",\" \"]","zone_2":"","zone_3":"","zone_4":"","zone_5":"","zone_6":"","zone_7":"","zone_8":"","zone_9":"","zone_10":"","zone_11":"","zone_12":"","yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v15.6.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Calligonum calvescens Maire - North Africa Trees<\/title>\n<meta name=\"robots\" content=\"noindex, follow\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Calligonum calvescens Maire - North Africa Trees\" \/>\n<meta property=\"og:description\" content=\"Shrub up to 2.5 m in height, highly branched, sometimes tufted, with branches of the current year green, glaucescent during droughts, \u00b1 striated on the lower parts, slightly or not branched at all, solitary or geminate, flexuous, elongated (up to 40 cm in length); old branches with suberous bark, white and fissured, tortuous. 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