Nuttallanthus canadensis |
Nuttallanthus floridanus |
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blue toadflax, Canada toadflax, linaire du Canada, old field toadflax |
Apalachicola toadflax, Florida toadflax |
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Fertile stems | 1–4(–7), simple, rarely distally branched, 11–70 cm. |
1–5, simple, sometimes distally branched, 9–45 cm. |
Leaves | blades of sterile-stem leaves narrowly elliptic to obovate, 2–12 × 0.5–3 mm, blades of fertile-stem leaves linear, 5–43 × 0.5–2.2 mm. |
blades of sterile-stem leaves elliptic to obovate, 1–6 × 0.5–2.8 mm, blades of fertile-stem leaves linear, 5–32 × 0.4–0.9(–1.4) mm. |
Racemes | 1–18 cm; bracts narrowly oblanceolate or lanceolate to narrowly elliptic, 1.1–3 mm. |
1–11 cm; bracts narrowly lanceolate to narrowly elliptic, 1–3.5(–5) mm. |
Pedicels | erect, 1.8–5.5 mm in fruit, sparsely glandular-pubescent, sometimes glabrous, hairs to 0.1 mm. |
ascending, sometimes erect, 6–14 mm in fruit, sparsely to densely glandular-pubescent, hairs to 0.3 mm. |
Flowers | calyx lobes linear-lanceolate to narrowly ovate, 2.1–3.5 × 0.4–1 mm, proximally sparsely glandular-pubescent, sometimes glabrous; corolla white to blue, 8–14 mm, spurs straight or curved, 2–7 mm, abaxial lip 2–4.5 mm, adaxial 1.2–2(–3) mm. |
calyx lobes lanceolate, 1.3–2.8 × 0.3–0.7 mm, sparsely to densely glandular-pubescent; corolla blue, 5–9 mm, spurs straight, 0.1–0.5 mm, abaxial lip 3–4.5 mm, adaxial 1–3.4 mm. |
Capsules | oblong-ovoid, 2.6–3.9 × 2.6–3.3 mm. |
oblong-globular, 2–3.7 × 1.8–3 mm. |
Seeds | black or gray, 0.3–0.5 mm, edges sharp, faces obscurely tuberculate. |
black, 0.3–0.5 mm, edges rounded, faces obscurely tuberculate. |
2n | = 12. |
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Nuttallanthus canadensis |
Nuttallanthus floridanus |
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Phenology | Flowering Feb–Jul(–Sep). | Flowering Mar–Apr. |
Habitat | Sandy prairies, woodlands, roadsides, fallow fields, disturbed sites. | Sandy woodlands, scrublands, sandhills, coastal dunes. |
Elevation | 0–300 m. (0–1000 ft.) | 0–100 m. (0–300 ft.) |
Distribution |
AL; AR; CA; CT; DC; DE; FL; GA; IA; IL; IN; KS; LA; MA; MD; ME; MI; MN; MO; MS; MT; NC; ND; NE; NH; NJ; NY; OH; OK; PA; RI; SC; SD; TN; TX; VA; VT; WA; WI; WV; BC; NB; NS; ON; PE; QC [Introduced in e Europe (Russia)]
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AL; FL; GA; MS
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Discussion | Nuttallanthus canadensis and N. texanus are sympatric through much of their ranges. In Texas, where they sometimes occur in mixed populations, R. Kral (1955) observed that N. canadensis bloomed and set fruit earlier than did N. texanus. (Discussion copyrighted by Flora of North America; reprinted with permission.) |
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Source | FNA vol. 17, p. 41. | FNA vol. 17, p. 41. |
Parent taxa | Plantaginaceae > Nuttallanthus | Plantaginaceae > Nuttallanthus |
Sibling taxa | ||
Synonyms | Antirrhinum canadense, Linaria canadensis | Linaria floridana |
Name authority | (Linnaeus) D. A. Sutton: Revis. Antirrhineae, 457. (1988) | (Chapman) D. A. Sutton: Revis. Antirrhineae, 461. (1988) |
Web links |
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