<P> Popular areas within Hyde Park include Speakers' Corner (located in the northeast corner near Marble Arch), close to the former site of the Tyburn gallows, and Rotten Row, which is the northern boundary of the site of the Crystal Palace . </P> <P> Flowers were first planted in Hyde Park in 1860 by William Andrews Nesfield . The next year, the Italian Water Garden was constructed at Victoria Gate, including fountains and a summer house . Queen Anne's Alcove was designed by Sir Christopher Wren and was moved to the park from its original location in Kensington Gardens . </P> <P> During the late 20th century, over 9,000 elm trees in Hyde Park were killed by Dutch elm disease . This included many trees along the great avenues planted by Queen Caroline, which were ultimately replaced by limes and maples . The park now holds 4 acres (1.6 ha) of greenhouses which hold the bedding plants for the Royal Parks . A scheme is available to adopt trees in the park, which helps fund their upkeep and maintenance . A botanical curiosity is the weeping beech, which is known as "the upside - down tree". A rose garden, designed by Colvin & Moggridge Landscape Architects, was added in 1994 . </P> <P> There are a number of assorted statues and memorials around Hyde Park . The Cavalry Memorial was built in 1924 at Stanhope Gate . It moved to the Serpentine Road when Park Lane was widened to traffic in 1961 . South of the Serpentine is the Diana, Princess of Wales memorial, an oval stone ring fountain opened on 6 July 2004 . To the east of the Serpentine, just beyond the dam, is London's Holocaust Memorial . The 7 July Memorial in the park commemorates the victims of 7 July 2005 London bombings . </P>

What kind of trees are in hyde park london
find me the text answering this question