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botanical name:
Linaria dalmatica
Linaria dalmatica © Deeproot Plant Base
common name:  Dalmatian Toadflax, Broadleaf Toadflax
synonyms:  Linaria genistifolia ssp.dalmatica
family:  Scrophulariaceae
characteristics: perennial
height: 1.00m
width: 0.60m
growth rate: medium
growth habit: erect
leaf colour: green
flower colour: yellow
fruit colour: brown & green
stem/bark: green
main season: Summer
aspect: full sun
conditions: dry soil, moist soil, sandy soil
preferred soil pH: any
minimum temp: -29°C
USDA zone: 5 to 9
Upright, branching perennial with a deep taproot and spreading lateral roots. Alternate oval to lance-shaped, glaucous green leaves, which are sessile or stem-clasping. Loose racemes in summer of spurred, yellow flowers, sometimes with orange tinting, up to 5cm long. Capsules containing up to 200 seeds follow.

Light, well drained, preferably sandy soil, in full sun. Will thrive in quite dry conditions.
Tends to be short lived, but propagates readily and may become invasive.

From seed, will usually self seed freely. Also from budded sections of horizontal roots.

other notes:
Native to Southern Italy, the Balkans and Romania. Also naturalised in parts of North America were it is regarded as a problematic weed..
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