Kallstroemia is a genus of flowering plant

Flowering plant

The flowering plants , also known as Angiospermae or Magnoliophyta, are the most diverse group of land plants. Angiosperms are seed-producing plants like the gymnosperms and can be distinguished from the gymnosperms by a series of synapomorphies...

s in the caltrop

Tribulus terrestris

Tribulus terrestris is a flowering plant in the family Zygophyllaceae, native to warm temperate and tropical regions of the Old World in southern Europe, southern Asia, throughout Africa, and Australia. It can thrive even in desert climates and poor soil...

 family, Zygophyllaceae

Zygophyllaceae

The Zygophyllaceae is a family of flowering plants that contains the bean-caper and caltrop. It includes around 285 species in 22 genera.In the APG III system of classification, the families Zygophyllaceae and Krameriaceae compose the order Zygophyllales...

. The approximately 17 species it contains are native to tropical and warm temperate regions of the Americas

Americas

The Americas, or America , are lands in the Western hemisphere, also known as the New World. In English, the plural form the Americas is often used to refer to the landmasses of North America and South America with their associated islands and regions, while the singular form America is primarily...

. The flower

Flower

A flower, sometimes known as a bloom or blossom, is the reproductive structure found in flowering plants . The biological function of a flower is to effect reproduction, usually by providing a mechanism for the union of sperm with eggs...

 and fruit

Fruit

In broad terms, a fruit is a structure of a plant that contains its seeds.The term has different meanings dependent on context. In non-technical usage, such as food preparation, fruit normally means the fleshy seed-associated structures of certain plants that are sweet and edible in the raw state,...

 morphology is similar to Tribulus

Tribulus

Tribulus is a genus of plants found in many warm regions. The best-known member is T. terrestris , a widespread weed and also the source of a dietary supplement....

. 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.

Selected species

• Kallstroemia californica
  Kallstroemia californica
  Kallstroemia californica is a species of flowering plant in the caltrop family known by the common name California caltrop. It is native to the deserts of the Southwestern United States, California, and northern Mexico.-Description:...
  
  (S.Watson) Vail – California Caltrop
• Kallstroemia grandiflora
  Kallstroemia grandiflora
  Kallstroemia grandiflora, or Arizona Poppy, is a summer annual herb of the deserts of the Southwestern United States, California, and northern Mexico....
  
  Torr. ex A.Gray – Arizona Poppy
• Kallstroemia hirsutissima Vail ex Small – Hairy Caltrop
• Kallstroemia maxima (L.) Hook. & Arn. – Big Caltrop
• Kallstroemia parviflora Norton – Warty Caltrop
• Kallstroemia perennans B.L. Turner – Perennial Caltrop
• Kallstroemia pubescens (G.Don) Dandy – Caribbean Caltrop

External links