Contains 4 accepted taxa overall.

Characteristics
Linaria Mill.
TOADFLAX
The three species here native to Florida are sometimes segregated into the genus Nuttallanthus. Recent studies have found Linaria to be monophyletic with the inclusion of Nuttallanthus (Fernández-Mazuecos et al. 2013; Vargas et al. 2014).
Classification
LAMIALES
Linaria
Citation
LINARIA Miller, Gard. Dict. Abr., ed. 4. 1754.
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TYPE: Linaria vulgaris Miller Lectotypified by Britton & A. Brown, Ill. Fl. N. U.S., ed. 2. 3: 176. 1913.
Species
Scientific Name Common Name Herbarium Specimens Status Photos
Linaria canadensis CANADIAN TOADFLAX Native
Linaria floridana APALACHICOLA TOADFLAX Native
Linaria maroccana MOROCCAN TOADFLAX Not Native
Linaria texana TEXAS TOADFLAX Native
[Family identification key]
1.  Corolla lower and upper lip subequal or one slightly longer; filaments usually hairy proximally; fruit 9-12 mm long
1.  Corolla lower lip greatly exceeding upper lip; filaments glabrous; fruit 2-5 mm long; seeds prismatic with longitudinal ridges
2
2.  Pedicel densely to sparsely glandular-pubescent (hairs to 0.3 mm long), 6-14 mm long in fruit, 2-10 times longer than calyx; corolla spur 0.1-0.5 mm long, shorter than calyx
2.  Pedicel glabrous to sparsely glandular-pubescent, in fruit (hairs to 0.1 mm long), 1.8-7(9) mm long in fruit, 0.8-2 times as long as calyx; corolla spur 2-11 mm long, subequal to longer than calyx
3
3.  Corolla (5)8-14 mm long (including spur), spur 2-7 mm long; seed edges sharply anged, faces smoot to obscurely tuberculate
3.  Corolla (11)14-22 mm long (including spur), spur 4.5-11 mm long; seed edges rounded to obscurely angled or dentate, faces densely tuberculate
Genus Synonyms
Synonym Full Citation Basionym Type
Nuttallanthus Nuttallanthus D. A. Sutton, Revis. Tribe Antirrh. 455. 1988. TYPE: Nuttallanthus canadensis (Linnaeus) D. A. Sutton (Antirrhinum canadense Linnaeus)