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Dyer's
Woad (Isatis tinctoria L.)
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Growth
Habit:
Biennial or perennial up to 3 ft. tall. Spreads
by seed. Rosette formed 1st year, flowering stem elongates 2nd
year.
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Leaves: Basal rosette leaves are
long with soft fine hairs. Stem
leaves alternate, have short basal lobes clasping the stem and
without hair.
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Stems: Woody, upper portion is
branched.
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Flowers: Small, yellow, 4 petals
1/8-inch across.
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Seeds: Plant has many, slightly
pear-shaped, winged, black
seed ponds 1/2" long that hang like ornaments. Each pod
contains one seed.
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Other: Formerly cultivated in Europe as a source of blue dye.
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