Contains 2 accepted taxa overall.

Characteristics
Justicia L.
WATERWILLOW
Classification
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LAMIALES
Justicia
Citation
JUSTICIA Linnaeus, Sp. Pl. 15. 1753, nom. cons. propos.
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TYPE: Justicia hyssopifolia Linnaeus, typ. cons. propos.
Species
Scientific Name Common Name Herbarium Specimens Status Photos
Justicia americana American Water-willow
Justicia ovata Coastal Plain Water-willow, Loose-flower Water-willow
Identification Key
1.  Bracts enlarged, foliaceous and overlapping, concealing flower buds
1.  Bracts small, not foliaceous, not overlapping, not concealing flower buds
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2.  Corolla orange, 3.5-5 cm long
2.  Corolla white, pink, purple, to reddish, 0.8-3 cm long
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3.  Stem densely pubescent and glandular
3.  Stem glabrous to glabrate, eglandular
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4.  Inflorescence a dense capitate spike, internodes not visible or scarcely apparent
4.  Inflorescence an elongate spike or panicle, the internodes plainly apparent
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5.  Inflorescence usually a panicle, the proximal internodes longer than the adjacent calyx
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5.  Inflorescence a spike, the proximal internodes subequal to shorter than the adjacent calyx
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6.  Inflorescence branches verticillate to subverticillate; corolla 2-6 mm long; fruit 4-5 mm long
6.  Inflorescence branches opposite or alternate; corolla 8-9 mm long; fruit 7-8 mm long
7.  Leaves narrowly lanceolate; corolla purple, 15-30 mm long
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7.  Leaves lanceolate to ovate; corolla pale lavender to white, 8-13 mm long
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8.  Leaves chartaceous
8.  Leaves fleshy
9.  Leaves narrowly lanceolate; flowers usually secund
9.  Leaves lanceolate to ovate; flowers usually not secund
Genus Synonyms
Synonym Full Citation Basionym Type
No synonyms found.