View source for Jussieua

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Jussieua (Bernard de Jussieu, 1699-1777, who laid the foundations of a modern natural system of the vegetable kingdom). Also written Jussieua. Onagraceae. Primrose Willow. This genus includes one or two herbs that are more or less cultivated, one at least as a water plant.

Herbs, shrubs or even tree-like plants, with alternate usually entire but sometimes serrate mostly narrow lvs., and sometimes more or less showy axillary or solitary white or yellow fls.: calyx tubular with 4-6 acute persistent lobes; petals 4-6, spreading, inserted on margin of the disk; stamens 8-12 in 2 rows, inserted with the petals; ovary 4-5-celled, style simple, stigma 4-6-lobed: fr. a terete, angled or costate, dehiscent, many-seeded caps.—Species about 50, widely distributed in temperate and warm regions, but most abundant in S. Amer.; some are native in the U. S.

The horticultural interest in this genus, in this country, centers about the plant known in the trade as J. longifolia, a summer-flowering aquatic herb, and differing somewhat from the botanical description given below. The stems of young seedlings are four- winged, and a specimen before the writer of a plant of the previous season is five-winged. The main root of these old plants may be tuber-like, 3 inches long, 1/2inch thick, or 8 to 10 inches long and more slender. Also the lower leaves, at least, are opposite.—J. longifolia is best treated as a tender annual. The seed may be sown in fall or spring in shallow water, using seed-pans or pots, as with other flower seeds. Cover the seed, which is very fine, with finely sifted soil, place the pot or seed-pan in water, but do not submerge until the second day, when the seed will be thoroughly soaked and will not float on the surface of the water. When the plants attain a few leaves they should be potted, singly, into thumb-pots, and later into 3-inch pots, and from these planted into their summer quarters. It is not absolutely necessary to keep these plants always submerged in water after potting. The plants will do well on a bench, which should be covered with sand or ashes and the plants kept well watered. (Wm. Tricker.)

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==Gallery==

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==References==
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*[[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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