Question: Which is a flowering plant the tolerates sandy soil and low rainfall: Luma or Cowpea?

Limnophila aromatica (synonym: Limnophila chinensis var.  aromatica; also called rice paddy herb) is a tropical flowering plant in the plantain family, Plantaginaceae.  It is native to Southeast Asia, where it flourishes in hot temperatures and grows most often in watery environments, particularly in flooded rice fields.  It is called "Ngò ôm" or "ngò om" or "ngổ" in Vietnam and used as an herb and also cultivated for use as an aquarium plant.  The plant was introduced to North America in the 1970s due to Vietnamese immigration following the Vietnam War.  It is called "ma om" (ម្អម) in Khmer.  It is used in traditional Cambodian soup dishes and Southern Vietnamese cuisine.  It can grow in flooded rice paddies during wet season but it grows best on drained but still wet sandy soil of harvested rice paddies for a few months after the rainy season ended.  It dies out soon after it flowers.  Rural Cambodians often harvest them and put them on the roof of their houses to dry for later use. <SEP>  Due to its tolerance for sandy soil and low rainfall it is an important crop in the semi-arid regions across Africa and other countries.  It requires very few inputs, as the plants root nodules are able to fix atmospheric nitrogen, making it a valuable crop for resource poor farmers and well-suited to intercropping with other crops. The cowpea, "Vigna unguiculata", is an annual herbaceous legume from the genus "Vigna".  The whole plant is used as forage for animals, with its use as cattle feed likely responsible for its name. <SEP>  It is native to the Valdivian temperate rain forests of Chile and Argentina. Luma is a genus of flowering plants in the myrtle family Myrtaceae, described as a genus in 1853. <SEP> Spinney Hills is in East Quogue, New York on the eastern end of the Long Island Central Pine Barrens region.  It is often used as a hiking, hunting, and off-roading area for dirt bikers, quadders, paintballers, and four-wheelers that includes miles of trails with near beach sand consistency.  Spinney hills gets its name because of Spinney Road, which used to connect the East Quogue side of the hills to Sears Bellows County Park and Flanders (home of the Big Duck) to the north prior to the construction of the Sunrise Highway New York State Route 27.  This region was created by glacial deposits of rock and sand during the last ice age.  The sandy soil also absorbs most rainfall so there are few ponds or rivers in the area.  There is a shallow glacial well in Spinney Hills known as an aquifer, which is where most of the rainfall in the region is stored.  These hills are the continuation of a long east west ridge of hills known as the Ronkonkoma Moraine, which form the 'backbone' of Long Island.  Much of this region is undeveloped other than a sand mine to the west and Southampton Pines to the east.  There have been large scale legal battles between private real estate companies and the Town of Southampton over the future of the area, being it is one of the last expanses of wilderness left on Long Island.  There is a very large native population of white-tailed deer in the region due to lack of natural predators.  In the higher elevations small sections of the hills have an almost alpine-desert look, with sandy open plateaus and extremely dwarfed vegetation .  The Dwarf Pitch Pine which dominate the region grow not much taller than twenty feet in height due to dry, nutrient-poor soil.  There is a desert effect in the Pine Barrens, with relatively higher daytime temperatures and cooler nighttime temperatures than the coast, only a few miles away.  There are spectacular views of the Atlantic Ocean and Peconic Bay from certain peaks in this region if one knows where to hike.  The consistent ocean breeze at the higher elevations passing through the long brushy needles of the Dwarf Pitch Pines creates a gentle whisping sound, or white noise, adding a peaceful ambience to the big skies and expansiveness one feels in this region.