Kallstroemia
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Kallstroemia
Kallstroemia grandiflora
Scientific classification
Kingdom: Plantae Division: Magnoliophyta Class: Magnoliopsida Order: Zygophyllales Family: Zygophyllaceae Genus: Kallstroemia Scop.

Kallstroemia is a genus of plants in the family Zygophyllaceae, the caltrop family, with about 17 species.^[1] They are native to tropical and warm temperate regions of the Americas. The flower and fruit morphology is similar to Tribulus. The convex fruits separate into about 10 nutlets each with one seed. The genus is named after A. Kallstroem who lived in the 18th century.

Species include:

• Kallstroemia californica - California caltrop
• Kallstroemia grandiflora - Arizona poppy
• Kallstroemia hirsutissima - hairy caltrop
• Kallstroemia maxima - big caltrop
• Kallstroemia parviflora - warty caltrop
• Kallstroemia perennans - perennial caltrop
• Kallstroemia pubescens - Caribbean caltrop

References

• USDA Plants Profile: North American Species
• Kearny, T. H., R. H. Peebles et al. (1960) Arizona Flora. University of California Press, Berkeley, CA. ISBN 0-520-00637-2

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