Justicia americana

name = American Water-willow

image_width = 200px
image_caption = "Justicia americana"
regnum = Plantae
divisio = Magnoliophyta
classis = Magnoliopsida
ordo = Lamiales
familia = Acanthaceae
genus = "Justicia"
species = "J. americana"
binomial = "Justicia americana"
binomial_authority = L.

American Water-willow ("Justicia americana") is a herbaceous, aquatic flowering plant in the Acanthus family 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 plant grows partially submerged in still water, reaching up to 40 cm (1 ft. 4 in.) tall from a creeping rhizome. The leaves are 10 cm (4 in.), opposite, sessile, linear or lanceolate, and slightly crenelated. The flowers are born in opposite arrangement on spikes 3 cm (1 in.) long coming off a peduncle 10 cm (4 in.) long. Color ranges from white to pale lavender with the upper lip purple blushed and the lower lip mottled in dark purple. The lateral lobes are unadorned or slightly blushed. The anthers are dark rather than the usual yellow. Flowering is from May to October. [http://www.missouriplants.com/Whiteopp/Justicia_americana_page.html "Justicia americana" at MissouriPlants.com]

The creeping rhizome allows "J. americana" to form large colonies on or near the shorelines of still or slow waters.
[ [http://www.wildflower.org/plants/result.php?id_plant=JUAM] Native Plant database at wildflower.org] [Justicia americana (L.) Vahl
American water-willow, Water-willow
Acanthaceae (Acanthus Family)
USDA Native Status: Native to U.S.


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Look at other dictionaries:

  • Justicia americana —   Justicia americana …   Wikipedia Español

  • Justicia americana — ID 44051 Symbol Key JUAM Common Name American water willow Family Acanthaceae Category Dicot Division Magnoliophyta US Nativity Native to U.S. US/NA Plant Yes State Distribution AL, AR, DC, DE, FL, GA, IA, IL, IN, KS, KY, LA, MD, MI, MO, MS, NC,… …   USDA Plant Characteristics

  • Justicia americana (L.) Vahl — Symbol JUAM Common Name American water willow Botanical Family Acanthaceae …   Scientific plant list

  • Justicia americana (L.) Vahl var. subcoriacea Fernald — Symbol JUAM Synonym Symbol JUAMS Botanical Family Acanthaceae …   Scientific plant list

  • Justicia — Justicia …   Wikipédia en Français

  • Justicia (planta) — Saltar a navegación, búsqueda Para otros usos de este término, véase Justicia (desambiguación). ? Justicia …   Wikipedia Español

  • Justicia — Not to be confused with Justitia. For the ocean liner, see SS Justicia. Justicia Justicia carnea Scientific classification Kingdom …   Wikipedia

  • Justicia — Justic …   Wikipédia en Français

  • Justicia (género) — Para otros usos de este término, véase Justicia (desambiguación).   Justicia …   Wikipedia Español

  • Justicia carnea —   Justicia americana …   Wikipedia Español

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