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Rubia (Latin, red; referring to the color of the dye extracted from the
root). Rubiaceae. Mostly hardy herbs, sometimes shrubby at base, of
little horticultural worth, but one, R. tinctorum, is of economic
value.
Plants frequently rather stiff, hispid, or aculeate: lvs. in whorls of
4-8 or very rarely opposite and stipulate, sessile or petioled,
lanceolate or obovate, rarely cordate: fls. small or minute, in
axillary or terminal cymes, 5-merous; involucre none; calyx-tube ovoid
or globose, limb lacking; corolla rotate or subcampanu- late; ovary
2-celled or through abortion 1-celled: fr. didymous, fleshy, 2- rarely
1-celled.—About 40 species, Medit. region, Trop, and S. Afr.f Temp.
Asia, Trop, and S. Temp. Amer. R. tinctorum is the dye-plant called
madder, the long, fleshy roots of which are ground to powder. Madder is
said to furnish a good green fodder if cut the second year when in
flower.
}}
Describe the plant here...
==Cultivation==
===Propagation===
===Pests and diseases===
==Varieties==
==Gallery==
<gallery perrow=5>
Image:Upload.png| photo 1
Image:Upload.png| photo 2
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</gallery>
==References==
<references/>
*[[Standard Cyclopedia of Horticulture]], by L. H. Bailey, MacMillan Co., 1963
<!--- xxxxx *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381 -->
<!--- xxxxx *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432 -->
<!--- xxxxx *Sunset National Garden Book. Sunset Books, Inc., 1997. ISBN 0376038608 -->
==External links==
*{{wplink}}
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