North Lawn (White House) requirement for public views of the White House. The Olmsted plan presented the landscape largely as seen today: retaining or planting large specimen trees and shrubs on the perimeter to create boundaries for visual privacy, but opened with generous sight lines of the house from north and south. The lawn is planted with a grass variety called tall fescue ("Festuca arundinacea)." Trees on the North lawn include fern-leaf beech ("Fagus sylvatica asplenifolia"), American elm ("Ulmus americana"), white oak ("Quercus alba"), white saucer magnolia ("Magnolia × soulangeana"), red maple ("Acer rubrum"), American Chestnut Tree ("Castanea dentata)" and American and English boxwood
Dioscorea sylvatica variable species, with several extremely distinct varieties. It is threatened from illegal collecting for traditional medicine, as well as for the horticultural trade. As a consequence it is listed as Vulnerable. Dioscorea sylvatica Dioscorea sylvatica ("forest elephants foot") is a species of a twining tuberous vine that is native to Africa. It is common and widespread in forest and thicket, throughout the summer rainfall areas of East and Southern Africa. It produces a distinctively flattened caudex, often with lobes that spread out. The creeping shoots grow throughout most of the year, though each will periodically die back and be replaced