Dalmatian toadflax

Linaria dalmatica (L.) P. Mill.

Description from Invasive.org

Appearance
Linaria dalmatica is a short-lived, perennial herb that can grow 3.9 ft. (1.2 m) tall. The overall form of the plant is narrow and upright, with multiple stems growing from a single woody base.
Foliage
Leaves are pale green, waxy, and heart-shaped, about 1-3 in. (2.5-7.6 cm) long in length, that clasp the stem at the base.
Flowers
Flowering occurs in May-September, when bright yellow, snapdragon-like flowers develop. Flowers, including the spur, are 1.4-2 in. (3.5-5 cm) long and occur in racemes at the apex of the stems.
Fruit
Fruits are capsules that are 0.1-0.3 in. (3-7 mm) long. Each capsule contains numerous small, black-brown, ridged seeds.
Ecological Threat
Linaria dalmatica occurs in fields, pastures, roadsides and rangelands. It is native to Europe and was introduced into North America, as an ornamental, in the late 1800s.

Resources


Selected Images from Invasive.org

View All Images at Invasive.org


Plant(s)
Bob Nowierski, Montana State University, Bugwood.org
Additional Resolutions & Image Usage
Plant(s)
Susan Turner, British Columbia Ministry of Forests, Bugwood.org
Additional Resolutions & Image Usage
Foliage foliage.
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage
Foliage
Steve Dewey, Utah State University, Bugwood.org
Additional Resolutions & Image Usage
Infestation
Bob Nowierski, Montana State University, Bugwood.org
Additional Resolutions & Image Usage
Foliage foliage.
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage
Flower(s) flowering stem.
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage
Seed(s) Seeds in various positions. Note honeycombed surface and ridged edges.
D. Walters and C. Southwick, USDA, Bugwood.org
Additional Resolutions & Image Usage
Flower(s)
Bob Nowierski, Montana State University, Bugwood.org
Additional Resolutions & Image Usage
Foliage
Linda Wilson, University of Idaho, Bugwood.org
Additional Resolutions & Image Usage
Flower(s)
Bob Nowierski, Montana State University, Bugwood.org
Additional Resolutions & Image Usage
Flower(s) flowers.
Joseph M. DiTomaso, University of California - Davis, Bugwood.org
Additional Resolutions & Image Usage
Seed(s) Close-up of seed edge and surface.
D. Walters and C. Southwick, USDA, Bugwood.org
Additional Resolutions & Image Usage
Seed(s) Lateral view of three seeds. Ventral side facing left.
D. Walters and C. Southwick, USDA, Bugwood.org
Additional Resolutions & Image Usage
Seed(s) Seeds in various positions. Note honeycombed surface and ridged edges.
D. Walters and C. Southwick, USDA, Bugwood.org
Additional Resolutions & Image Usage
Seed(s) Ventral view of five seeds. Arrows point to flared hilum.
D. Walters and C. Southwick, USDA, Bugwood.org
Additional Resolutions & Image Usage
Seed(s) Lateral view of seed with ventral side facing left. Inset is ventral view showing flared hilum.
D. Walters and C. Southwick, USDA, Bugwood.org
Additional Resolutions & Image Usage

Distribution