Petrea

Directory

References

Discover

Ice Sledge Hockey, Hockey Canada Cup, USA (left) vs Canada, 2009. UBC Thunderbird Arena, Vancouver, BC, competition site for Olympic ice hockey and Paralympic ice sledge hockey. Vancouver 2010 Olympic and Paralympic Winter Games, Vancouver Olympics

10 Best Hockey Players of All Time

The Judiciary Committee of the U.S. House of Representatives receiving a deputation of female suffragists, January 11, 1871, a lady delegate (identified as Victoria Woodhull) reading her argument (cont'd)

Who Was the First Woman to Run for President of the United States?

VAN, TURKEY - OCTOBER 25: A building and car ruined during the earthquake of Van-Ercis on October 25, 2011 in Van, Turkey. It is 604 killed and 4152 injured in Van-Ercis Earthquake.

What Is an Aftershock?

Bristlecone pine (Pinus Longaeva) on the slope of Mount Washington in Great Basin National Park in the Nevada desert.

How Can Some Trees Survive for Thousands of Years?

Snowshoe hare (Lepus americanus) with its Summer coat on the left side and its winter coat on the right.

7 Animals That Turn White in Winter

Vietnam War. U.S. President Lyndon B. Johnson awards the Distinguished Service Cross to First Lieutenant Marty A. Hammer, during a visit to military personnel, Cam Ranh Bay, South Vietnam, October 26, 1966. President Johnson

Vietnam War Timeline

The impeachment trial of Pres. Andrew Johnson, illustration from Frank Leslie's Illustrated Newspaper, March 28, 1868.

What If the President Is Impeached?

Petrea

plant genus

Learn about this topic in these articles:

characteristics

In Verbenaceae
Outstanding among the 30 Petrea species, all tropical American, is a woody evergreen vine called purple wreath, or sandpaper vine (P. volubilis). It bears long, hanging clusters of violet-blue pansylike flowers and has oval leaves so rough as to be likened to sandpaper. The 220 species of the genus…
Read More