Types of Proteas

Types of Proteas image by http://www.openstockphotography.org/image-licensing/Protea-cynaroides/Protea_cynaroides_6.jpg
Types of Proteas image by http://www.openstockphotography.org/image-licensing/Protea-cynaroides/Protea_cynaroides_6.jpg

Overview

Proteas are shrubs that vary from a low, spreading habit to tree-like habit 20 feet tall. All proteas are adapted to grow in hot climates, but the 1,500-plus species of proteas are adapted for different altitude, soil type and soil moisture. There are three leaf types, but many leaf shapes.

Isobilateral

Isobilateral protea leaves are the same on both sides. The leaves are upright to face the sun in both the morning and afternoon, but shade the sides at noon to save water. Some are branched.

Terete

Terete protea leaves are short, thin and cylindrical, like pine needles or rosemary. Their compact size minimizes surface area where water can be lost. Some are branched.

Canaliculate

Canaliculate protea leaves hug close to the stem so that they shade the stem from heat while they protect the soft inner-leaf surface, where pores take in carbon dioxide for photosynthesis.

Fire

To survive fire, some protea burn, then grow back from a woody tuber on their roots. Other protea have seeds that stay dormant in ant tunnels until high heat causes germination. Some protea hold their seeds on the dead flower head until a burn releases them.

Southern Hemisphere

Protea are found only in the Southern hemisphere, mostly in Cape Province, South Africa. Members of their family, proteacea, are also found in New South Wales, Australia, and in South America.

References

  • Diversity
  • Royal Botanical Gardens Kew
  • Protea World Atlas

Who Can Help

  • Proteacea photos

About this Author

Sara Kirchheimer holds a Bachelor of Science in physical geography from Arizona State University and is currently retired from the transportation and travel industry in northern Europe and the western United States. In addition to commercial writing, she has contributed art exhibit reviews to Phoenix Arts and hurricane update articles to New Orleans Indymedia.

Photo by: http://www.openstockphotography.org/image-licensing/Protea-cynaroides/Protea_cynaroides_6.jpg

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