Isatis

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 Isatis subsp. var. L.  
Isatis tinctoria
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Brassicaceae > Isatis var. L. ,


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Isatis (Í-sa-tis) is a genus of about 30 species of flowering plants in the family Brassicaceae, native to the Mediterranean region east to central Asia. The genus includes woad (Isatis tinctoria).


Standard Cyclopedia of Horticulture

Isatis (ancient name, of obscure meaning). Cruciferae. 'Herbs, for ornament and for dyeing.

Annual, biennial, perennial; erect, branching, glabrous or pubescent or rarely tomentose: lvs. undivided, the upper ones clasping and auricled: fls. small, yellow, many in lax racemes, without bracts; sepals and petals 4: pod large and mostly flat, pendulous, linear to oblong or obovate or even nearly circular, indehiscent, strong-ribbed on either side, 1-seeded, the stigma sessile; radicle mostly incumbent.—Species about 50, Eu., N. Afr.. Asia.

This genus includes the dyer's woad, I. tinctoria formerly cultivated for a blue dye but no longer advertised. Caesar relates that the ancient Britons used the wood for staining their bodies, and the word Britain itself comes from an old Celtic word meaning painted. Before indigo became common in Europe, the dyer's woad produced the chief blue coloring matter for woolen cloth. The introduction of indigo in the seventeenth century destroyed this important industry, not without opposition. Dioscorides and Pliny mention both the dyer's woad and indigo.

I. boissieridna Reichb. Annual, 12 in.: basal lvs. cuncate- oblong, toothed; upper lvs. entire, oblong: fls. yellow: pod pubescent, various. Turkestan.


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Isatis is the ancient name of Yazd , a city in Iran.

Cultivation

Propagation

Pests and diseases

Species

About 30 species, including:
Isatis boissieriana
Isatis glauca
Isatis tinctoria

Gallery

References

External links

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