Justicia americana, the American water-willow, is a herbaceous, aquatic flowering plant in the family Acanthaceae native to North America. It is the hardiest species in the genus Justicia, the other members of which being largely tropical and subtropical, and it is able to survive as far north as USDA zone 4. It is common throughout its range.
The grows partially submerged in still or flowing water, reaching up to 40 cm (16 in) tall from a creeping rhizome. The leaves are 10 cm (3.9 in), opposite, sessile, linear or lanceolate, and slightly crenulated. The flowers are bicolored, borne in opposite arrangement on spikes 3 cm (1.2 in) long coming off a peduncle 10 cm (3.9 in) long. Color ranges from white to pale lavender with the upper corolla lip pale violet or white, arching over the lower lip mottled in dark purple. The lateral lobes are unadorned or slightly blushed. The anthers are purplish-red rather than the usual yellow. Flowering is from May to October.[1] The fruit of this plant is a small brown capsule.
The creeping rhizome allows Justicia americana to form large colonies on or near the shorelines of still or slow waters in lakes and rivers, and on rocky riffles and shoals in faster flowing rivers. Its rhizomes and roots provide important spawning sites for many fish species and habitat for invertebrates.
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Justicia americana, the American water-willow, is a herbaceous, aquatic flowering plant in the family Acanthaceae native to North America. It is the hardiest species in the genus Justicia, the other members of which being largely tropical and subtropical, and it is able to survive as far north as USDA zone 4. It is common throughout its range.
The grows partially submerged in still or flowing water, reaching up to 40 cm (16 in) tall from a creeping rhizome. The leaves are 10 cm (3.9 in), opposite, sessile, linear or lanceolate, and slightly crenulated. The flowers are bicolored, borne in opposite arrangement on spikes 3 cm (1.2 in) long coming off a peduncle 10 cm (3.9 in) long. Color ranges from white to pale lavender with the upper corolla lip pale violet or white, arching over the lower lip mottled in dark purple. The lateral lobes are unadorned or slightly blushed. The anthers are purplish-red rather than the usual yellow. Flowering is from May to October. The fruit of this plant is a small brown capsule.
The creeping rhizome allows Justicia americana to form large colonies on or near the shorelines of still or slow waters in lakes and rivers, and on rocky riffles and shoals in faster flowing rivers. Its rhizomes and roots provide important spawning sites for many fish species and habitat for invertebrates.
Justicia in typical habitat
Justicia americana es una especie de planta acuática perteneciente a la familia de las acantáceas. Es nativa de Norteamérica.
Es la más resistente de las especies del género Justicia; los demás miembros son mayormente tropicales y subtropicales, y es capaz de sobrevivir hasta en el norte de EE. UU. La planta crece parcialmente sumergida en el agua que fluye; alcanza hasta 40 cm de altura a partir de un rizoma. Las hojas son de 10 cm de largo, sésiles, lineares o lanceoladas, ligeramente onduladas, y las flores son de dos colores, de blanco a lila pálido, con la corola violeta. El fruto de esta planta es una pequeña cápsula de color marrón.[1]
El rizoma rastrero le permite formar grandes colonias en o cerca de las costas de aguas tranquilas o en los lagos y ríos lentos, y en los rápidos rocosos y bancos de arena en los ríos que fluyen más rápido. Sus rizomas y raíces proporcionan importantes lugares de desove para muchas especies de peces y el hábitat de los invertebrados.[2][3]
Justicia americana fue descrita por (L.) Vahl y publicada en Symbolae Botanicae, . . . 2: 15. 1791.[4]
Justicia: nombre genérico otorgado en honor de James Justice (1730-1763), horticultor escocés.[5]
americana: epíteto geográfico que alude a su localización en América.
Justicia americana es una especie de planta acuática perteneciente a la familia de las acantáceas. Es nativa de Norteamérica.
La carmantine d'Amérique (Justicia americana) est une espèce de plantes herbacées à fleurs de la famille des Acanthaceae.
Selon Tropicos (4 février 2015)[2] (Attention liste brute contenant possiblement des synonymes) :
La carmantine d'Amérique (Justicia americana) est une espèce de plantes herbacées à fleurs de la famille des Acanthaceae.
Justicia americana là một loài thực vật có hoa trong họ Ô rô. Loài này được Vahl mô tả khoa học đầu tiên.[1]
Phương tiện liên quan tới Justicia americana tại Wikimedia Commons
Justicia americana là một loài thực vật có hoa trong họ Ô rô. Loài này được Vahl mô tả khoa học đầu tiên.
