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, 15:51, 19 March 2010
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Ipomoea learii, Paxt. Blue Dawn-flower. St. a very rapid grower, often 30-40 ft. long, somewhat shrubby at the base: lvs. 3-6 in. long, cordate, acute, mostly entire or slightly 3-lobed, variable: fls. borne in clusters of 12- 30, opening in succession; corolla 4-5 in. broad, bell- shaped, deep lilac, sometimes dark purple with five lighter plaits. Very beautiful. Aug.-Oct. Tropics of both hemispheres; widespread. B.M. 3928 (as Pharbitis lean). B.R. 27:56 (as Pharbitis lean).—A magnificent species for the warmhouse, but not usually satisfactory outside, at least in the N. One plant is on record as producing 60,000 fls. at the rate of 300 a day. When grown in the open the fls. are likely to be an unattractive coppery purple. Thoroughly naturalized in S. Calif., and a most useful plant for covering waste places, enbankments, and the like.
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