Nuttallanthus canadensis

Fertile stems 1–4(–7), simple, rarely distally branched, 11–70 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. Racemes 1–18 cm; bracts narrowly oblanceolate or lanceolate to narrowly elliptic, 1.1–3 mm. Pedicels erect, 1.8–5.5 mm in fruit, sparsely glandular-pubescent, sometimes glabrous, hairs to 0.1 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. Capsules oblong-ovoid, 2.6–3.9 × 2.6–3.3 mm. Seeds black or gray, 0.3–0.5 mm, edges sharp, faces obscurely tuberculate. 2n = 12.

Phenology: Flowering Feb–Jul(–Sep).
Habitat: Sandy prairies, woodlands, roadsides, fallow fields, disturbed sites.
Elevation: 0–300 m.

Distribution

• Generated Map
• Legacy Map

B.C., N.B., N.S., Ont., P.E.I., Que., Ala., Ark., Calif., Conn., Del., D.C., Fla., Ga., Ill., Ind., Iowa, Kans., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Mont., Nebr., N.H., N.J., N.Y., N.C., N.Dak., Ohio, Okla., Pa., R.I., S.C., S.Dak., Tenn., Tex., Vt., Va., Wash., W.Va., Wis., introduced in e Europe (Russia).

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.

Selected References

None.

Lower Taxa

None.