View source for Dahlia excelsa

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Dahlia excelsa, Benth. (D. arborea, Regel). Height to 20 ft. or more: sts. several from same base, usually unbranched,  glaucous, marked with horizontal rings made by the stem-clasping base of the petioles as the lower Lvs. fall away, becoming woody for several feet in mild climates: Lvs. bipinnate, as much as 2½ ft. long, 2 ft. wide; Ifts. as many as 25, ovate, those of the upper Lvs. often contracted at the base, acuminate, toothed, pale green beneath, with a few short scattered hairs or none: fls. 4½ in. across, dilute purple, crimson-pink. G.C. II. 19:80; III. 27:85.—This species was described from a cult, plant with 8 rays in a single row, but with considerably elongated disk-fls. It was almost an anemone-fld. type, and all the florets were sterile. D. arborea has never been sufficiently described as a botanical species, but plants have been cult, for many years under this name. Var. anemonaeflora, Hort. Disk of lilac or yellow tubular florete; rays flat.
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==Cultivation==
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===Propagation===
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===Pests and diseases===
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==Species==
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==Gallery==
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==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==
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