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purple toad flax

Dalmatian toadflax, dalmation toadflax, linaire á feuilles larges

Habit Perennials, from taproot, not reproducing vegetatively by stolons. Perennials, reproducing vegetatively by adventitious buds or stolons.
Fertile stems

erect or suberect, to 71(–140) cm;

sterile stems to 18 cm.

erect, 49–150 cm;

sterile stems to 15 cm.

Leaves

of fertile stems: blade oblanceolate to linear, usually flat, 5–45(–60) × 0.8–4(–8) mm, apex acute or subobtuse.

of fertile stems: blade ovate to lanceolate, flat, 10–65 × 3–31 mm, apex acute.

Racemes

1–117-flowered, dense;

bracts linear, 2–5(–5.5) × 0.3–1 mm.

1–35-flowered, lax or dense;

bracts ovate to lanceolate, 3–20 × 2–12 mm.

Pedicels

erect, 1–3 mm in flower, 2–4(–5) mm in fruit.

erect-patent to erect, 3–22 mm in flower, 4–32 mm in fruit.

Styles

simple;

stigma entire.

simple;

stigma entire.

Corollas

violet to purple, with yellow or lilac palate, 9–13(–17) mm;

tube 1.5–2.5 mm wide, spurs curved, 5–7(–9) mm, subequal to rest of corolla, abaxial lip sinus (0.6–)0.8–1.5(–2) mm, adaxial lip sinus 1 mm.

pale to bright yellow, (27–)28–49 mm;

tube 6–11 mm wide, spurs straight or curved, 11–30 mm, slightly shorter, subequal to, or longer than rest of corolla, abaxial lip sinus (1.8–)2–2.5 mm, adaxial lip sinus 2–3.5(–4) mm.

Calyx

lobes linear to linear-lanceolate, 1.5–3 × 0.5–1 mm in flower, 2–3.5 × 0.7–1.2 mm in fruit, apex acute or subacute.

lobes ovate to linear-lanceolate, (1.9–)3–9.5 × (0.9–)1–3.5 mm in flower, 4–10(–13) × 1.5–5 mm in fruit, apex acute.

Capsules

subglobular, 2.7–4 × 2.5–3.7 mm, glabrous;

loculi equal.

subglobular, 4–7 × 4–7 mm, glabrous;

loculi equal, rarely subequal.

Seeds

black or blackish brown, subtrigonous or ± tetrahedral, 0.8–1.2 × 0.6–1 mm, with longitudinal marginal ridges and anastomosed ridges or tubercles on faces;

wing absent.

brown, brown-gray, or black, subtrigonous or ± tetrahedral, 1–2 × 0.8–1.6 mm, with longitudinal obtuse marginal ridges and anastomosed obtuse or truncate ridges on faces;

wing absent.

2n

= 12 (Europe).

Linaria purpurea

Linaria dalmatica

Phenology Flowering Jun–Oct.
Habitat Disturbed places, railroad rights-of-way, beach foreshores.
Elevation 0–1900 m. (0–6200 ft.)
Distribution
from FNA
CA; OR; WA; BC; s Europe (Italy) [Introduced in North America; introduced also in s South America (Argentina), n Europe, Australia]
[WildflowerSearch map]
[BONAP county map]
from FNA
AZ; CA; CO; CT; ID; IL; IN; KS; MA; ME; MI; MN; MT; ND; NE; NH; NM; NV; OH; OK; OR; PA; RI; SC; SD; UT; VT; WA; WY; AB; BC; MB; NB; NF; NS; ON; QC; SK; YT; Europe; sw Asia [Introduced in North America; introduced also in s South America (Argentina), Australia]
[WildflowerSearch map]
[BONAP county map]
Discussion

Subspecies 2 (2 in the flora).

Linaria dalmatica was originally introduced into North America as an ornamental plant and is currently classified as a noxious weed in seven states in the United States and two Canadian provinces (https://plants.usda.gov/core/profile?symbol=LIDA).

Subspecies of Linaria dalmatica can be difficult to recognize because characteristics partly overlap and intermediate specimens may be found.

Linaria genistifolia and L. dalmatica are closely related, and the latter is sometimes treated as a subspecies of L. genistifolia by several authors. Although further research is required in this species complex (including L. grandiflora, among others), the author recognizes L. genistifolia and L. dalmatica as independent species. Nevertheless, published references to L. genistifolia could in fact correspond to L. dalmatica. In order to obtain a conclusive identification for either species, it is necessary to study flowering specimens.

(Discussion copyrighted by Flora of North America; reprinted with permission.)

Key
1. Pedicels 4–10(–13) mm in fruit; corollas (27–)28–38(–42) mm; spurs 11–24 mm, shorter, subequal to, or longer than rest of corolla.
subsp. dalmatica
1. Pedicels (7–)12–32 mm in fruit; corollas 30–49 mm; spurs 18–30 mm, subequal to or longer than rest of corolla.
subsp. macedonica
Source FNA vol. 17, p. 31. FNA vol. 17, p. 29.
Parent taxa Plantaginaceae > Linaria Plantaginaceae > Linaria
Sibling taxa
L. bipartita, L. dalmatica, L. genistifolia, L. grandiflora, L. maroccana, L. repens, L. spartea, L. triornithophora, L. vulgaris
L. bipartita, L. genistifolia, L. grandiflora, L. maroccana, L. purpurea, L. repens, L. spartea, L. triornithophora, L. vulgaris
Subordinate taxa
L. dalmatica subsp. dalmatica, L. dalmatica subsp. macedonica
Synonyms Antirrhinum purpureum Antirrhinum dalmaticum, L. genistifolia subsp. dalmatica
Name authority (Linnaeus) Miller: Gard. Dict. ed. 8, Linaria no. 5. (1768) (Linnaeus) Miller: Gard. Dict. ed. 8, Linaria no. 13. (1768)
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