Contains 6 accepted taxa overall.

Characteristics
Gratiola L.
HEDGEHYSSOP
The genus Sophronanthe is sister to Gratiola s.s. (Estes 2008; Estes & Small 2008). Sophronanthe (leaves papillose and revolute-margined with septate trichomes, sepals unequal, thecae parallel to filaments) has been segregated from Gratiola (leaves not papillose nor revolute without septate trichomes, discoid-dilated anther connectives, thecae perpendicular to filaments) to allow for more easily defined genera morphologically (Estes 2008). Contrarily, based on analysis of seeds, Ahedor & Elisens (2015) preferred recognizing Gratiola s.l. to include Sophronanthe.
Classification
LAMIALES
Gratiola
Citation
GRATIOLA Linnaeus, Sp. Pl. 17. 1753.
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TYPE: Gratiola officinalis Linnaeus Lectotypified by Britotn & A. Brown, Ill. Fl. N. U.S., ed. 2. 3: 194. 1913.
Species
Scientific Name Common Name Herbarium Specimens Status Photos
Gratiola aurea GOLDEN HEDGEHYSSOP Native OBL (NWPL)
Gratiola brevifolia STICKY HEDGEHYSSOP Native FACW (NWPL) FACW (DEP)
Gratiola floridana FLORIDA HEDGEHYSSOP Native OBL (NWPL) FACW (DEP)
Gratiola ramosa BRANCHED HEDGEHYSSOP Native FACW (NWPL) T (WAP) FACW (DEP)
Gratiola virginiana ROUNDFRUIT HEDGEHYSSOP Native OBL (NWPL) FACW (DEP)
Gratiola viscidula SHORT'S HEDGEHYSSOP Native OBL (NWPL)
[Family identification key]
1.  Leaves with (3)5-10(12) pairs of conspicuous teeth
1.  Leaves entire or with 1-4(5) pairs of low blunt teeth
2
2.  Bracteoles subtending calyx 0(1)
2.  Bracteoles subtending calyx (1)2
3
3.  Pedicels 20-45(55) mm long; corolla 14-25 mm long
3.  Pedicels 5-25(30) mm long; corolla 8-15 mm long
4
4.  Corolla usually longer than the pedicel
4.  Corolla usually shorter than the pedicel
5
5.  Pedicels densely glandular-puberulent to glandular-pubescent; corolla lobes white
5.  Pedicels sparsely glandular-puberulent; corolla lobes yellow (rarely white)
Genus Synonyms
Synonym Full Citation Basionym Type
Amphianthus Amphianthus Torrey, Ann. Lyceum Nat. Hist. New York 4(1): 82. 1837. Amphianthus pusillus Torr.
Fonkia Fonkia Philippi, Linnaea 30: 198. 1859. TYPE: Fonkia uliginosa Philippi
Nibora Nibora Rafinesque, Fl. Ludov. 36. 1817. TYPE: Nibora aquatica Rafinesque