Contains 2 accepted taxa overall.

Characteristics
Trichostema L.
BLUECURLS
Classification
LAMIALES
Trichostema
Citation
TRICHOSTEMA Linnaeus, Sp. Pl. 598. 1753.
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TYPE: Trichostema dichotomum Linnaeus Lectotypified by Britton & A. Brown, Ill. Fl. N. U.S., ed. 2. 3: 104. 1913.
Distribution Map Present

This species have been reported in the counties highlighted.

Species
Scientific Name Common Name Herbarium Specimens Status Photos
Trichostema dichotomum FORKED BLUECURLS Native UPL (NWPL)
Trichostema setaceum NARROWLEAF BLUECURLS Native
Identification Key
1.  Longest stem hairs 3-8 cells long, the stem nodes with hairs primarily spreading, rarely downwardly or upwardly curled; leaves widest towards the base or near the middle, not linear; longer style branch 1-2 times as long as the shorter one (Trichostema dichotomum s.lat.)
2
1.  Longest stem hairs usually 1-2 cells long, occasionally 3 cells long, the stem nodes with hairs primarily downwardly curved to appressed, rarely spreading or upwardly curled; leaves widest near the middle or towards the apex, or linear; longer style branch 2-6(9) times as long as the shorter
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2.  Plant annual, branching primarily from the middle to upper part of the plant; mid-stem hairs spreading, occasionally downwardly or upwardly curled, node hairs spreading, rarely upwardly curved, longest hairs 5-8 cells long; nutlet appearing wrinkled, the ridges distinct, steep-sided; panhandle and peninsula south to Manatee and Brevard counties
2.  Plant short-lived perennial, branching throughout the plant; mid-stem hairs downwardly curved, occasionally spreading, lthe node hairs spreading, rarely downwardly curved, longest hairs 3-6 cells long; nutlet relatively smooth, the ridges low and shallow sided
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3.  Older plants compact, to 1 m tall; largest leaves 1.5-3.5 cm long, 0.5-1.3 cm wide, 2.4-3.6 times as long as wide; coastal, calcareous substrates, Pasco and Flagler south to Monroe mainland and Miami-Dade counties
3.  Older plants leggy, to 1.25 m tall; largest leaves 2.7-5.5 cm long, 0.7-1.8 cm wide, 2.9-4.4 times as long as wide; panhandle and peninsula south to Collier and Martin counties, not restricted to calcareous substrates
4.  Annual, branches few to none, often branching primarily in the middle and upper part of the plant; largest leaves 1.8-5 cm long, 1.5-25 times as long as wide; somewhat widespread (Trichostema setaceum s.lat.)
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4.  Suffrutescent perennial, branching primarily near the base or throughout; largest leaves 1-2.5 cm long, 1.5-9 times as long as wide; restricted to the Florida Peninsula (Trichostema suffrutescens s.lat.)
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5.  Largest leaves 1.8-3.5 cm long, 1.5-9 times long as wide; Franklin Co.
5.  Largest leaves 2-5 cm long, 5-25 times long as wide; panhandle and peninsula south to Pasco and Volusia Cos.
6.  Largest leaves 3-9 times long as wide; nutlet strongly wrinkled or pockmarked, the ridges prominent and stocky
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6.  Largest leaves 1.5-4.5 times long as wide; nutlet smooth to slightly wrinkled, the ridges faint to somewhat prominent
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7.  Stem and node hairs primarily downwardly curved; largest leaves typically 1.5-2.5 cm long, 3.5-9 times long as wide; Brevard and Hillsborough south to Lee and Broward counties
7.  Stem and node hairs primarily spreading to upwardly curved; largest leaves typically 1.1-1.9 cm long, 3-5 times long as wide; Alachua, Citrus, Gilchrist, Hernando, Levy, Marion, and Pasco counties
8.  Plant branching throughout; flowering Oct-Jan; Martin and perhaps Palm Beach counties
8.  Plant branching primarily near the base; flowering Jun-Dec; central Florida counties
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9.  Plant more robust, to 1 m tall, differently scented; fruiting calyx 5.2-6.2 mm long; Polk, Highlands, Osceola, and potentially Hardee, Lake, and Orange counties
9.  Plant less robust, to 0.6 m tall, differently scented; fruiting calyx 4.7-6.0 mm long; Clay, Lake, Marion, Orange, Putnam, and Seminole counties
Genus Synonyms
Synonym Full Citation Basionym Type
Isanthus Isanthus Michaux, Fl. Bor.-Amer. 2: 3, t. 30. 1803. TYPE: Isanthus coeruleus Michaux