Petalostemum

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Standard Cyclopedia of Horticulture

Petalostemum (Greek for petal and stamen, alluding to the way in which these organs are joined). Sometimes spelled Petalostemon. By By some authors, the species have been referred to Kuhnistera. Leguminbsx. American herbs, mostly western, with long'or deep perennial roots, sometimes planted for ornament. Leaves glandular, alternate; blades unequally pin- nately compound; lfts. often broadest above the middle and involute: fls. perfect, in short or elongated spikes; calyx-teeth nearly equal, rather broad, shorter than the tube; corolla white, pink, purple, or violet; petals on long slender claws; standard oblong or obcordate; wings and keel-petal similar, their claws adnate to the sheath of the stamen-tube almost to its summit; stamens 5, monadelphous, alternate with the petals; ovary sessile, 2-ovuled; style subulate: pod included in the calyx, mostly dehiscent, l-2-8eeded. Distinguished from its close relative Dalea by having only 5 stamens instead of 9-10 as in that genus.—About 27 species. These low bushy plants with fine-cut lvs. and bearing a constant succession of showy spikes of fls. are very attractive, and well adapted for borders and rock- gardens. CH The above text is from the Standard Cyclopedia of Horticulture. It may be out of date, but still contains valuable and interesting information which can be incorporated into the remainder of the article. Click on "Collapse" in the header to hide this text.

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References

• Standard Cyclopedia of Horticulture, by L. H. Bailey, MacMillan Co., 1963

External links

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