The origin of the "Jerusalem" part of the name is uncertain. Italian settlers in the United States called the plant , the Italian word for sunflower, because of its familial relationship to the garden sunflower (both plants are members of the genus "Helianthus"). Over time, the name "girasole" (pronounced closer to in southern Italian dialects) may have been changed to Jerusalem. In other words, English speakers would have corrupted "girasole artichoke" (meaning, "sunflower artichoke") to Jerusalem artichoke. Another explanation for the name is that the Puritans, when they came to the New World, named the plant with regard to the "New Jerusalem" they believed they were creating in the wilderness. Also, various other names have been applied to the plant, such as the French or Canada potato, "topinambour", and lambchoke. Sunchoke, a name by which it is still known today, was invented in the 1960s by Frieda Caplan, a produce wholesaler who was trying to revive the plant's appeal. The artichoke part of the Jerusalem artichoke's name comes from the taste of its edible tuber. Samuel de Champlain, the French explorer, sent the first samples of the plant to France, noting its taste was similar to that of an artichoke. The name "topinambur", in one account, dates from 1615, when a member of the Brazilian coastal tribe called the Tupinambá visited the Vatican at the same time that a sample of the tuber from Canada was on display there, presented as a critical food source that helped French Canadian settlers survive the winter. The New World connection resulted in the name "topinambur" being applied to the tuber, the word now used in French, German, Italian, Romanian, Russian, and Spanish. Jerusalem artichokes were first cultivated by the Native Americans long before the arrival of the Europeans; this extensive cultivation obscures the exact native range of the species. The French explorer Samuel de Champlain discovered that the native people of Nauset Harbor in Massachusetts had cultivated roots that tasted like artichoke. The following year, Champlain returned to the same area to discover that the roots had a flavour similar to chard and was responsible for bringing the plant back to France. Some time later, Petrus Hondius, a Dutch botanist, planted a shrivelled Jerusalem artichoke tuber in his garden at Terneuzen and was surprised to see the plant proliferate.