Question: Which leader, who unified Germany in the 1860s has a genus of plants in Madagascar named after him? 

 The genus is named for the first chancellor of the German Empire Otto von Bismarck and the epithet for its only species, Bismarckia nobilis, comes from Latin for 'noble'. Bismarckia is a monotypic genus of flowering plant in the palm family endemic to western and northern Madagascar where they grow in open grassland. <SEP> While German-speaking people have a long history, Germany as a nation state dates only from 1871.  Earlier periods are subject to definition debates.  The Franks, for instance, were a union of Germanic tribes; nevertheless, some of the Franks later identified themselves as Dutch, Flemish, French and again others as Germans.  The capital of medieval ruler Charlemagne's empire was the city of Aachen, now part of Germany, yet he was a Frank.  France was named after the Franks and the Dutch and Flemish people are the only ones to speak a language that descends from Frankish (the language of the Franks).  Hence nearly all continental Western European historians can claim his victories as their heritage.  The Holy Roman Empire he founded was largely but far from entirely German speaking.  The Kingdom of Prussia, which unified Germany in the 19th century, had significant territory in what is now Poland.  In the early 19th century, the philosopher Schlegel referred to Germany as a "Kulturnation", a nation of shared culture and political disunity, analogous to ancient Greece.  Until the unification of 1871, Austria was considered a part of Germany even though much of its empire was not in the Holy Roman Empire and was non-German. <SEP> Lesbian, gay, bisexual and transgender (LGBT) rights in Germany have evolved significantly over the course of the last decades.  During the 1920s, LGBT people in Berlin were generally tolerated by society and many bars and clubs specifically pertaining to gay men were opened.  Although same-sex sexual activity between men was already made illegal under Paragraph 175 by the German Empire in 1871, Nazi Germany extended these laws during World War II, which resulted in the persecution and deaths of thousands of homosexual citizens.  The Nazi extensions were repealed in 1950 and same-sex sexual activity between men was decriminalised in both East and West Germany in 1968 and 1969, respectively.  The age of consent was equalized in unified Germany in 1994. <SEP>  In the 1860s, he engineered a series of wars that unified the German states, deliberately excluding Austria, into a powerful German Empire under Prussian leadership. Otto Eduard Leopold, Prince of Bismarck, Duke of Lauenburg (1 April 1815 – 30 July 1898), known as Otto von Bismarck (] ), was a conservative Prussian statesman who dominated German and European affairs from the 1860s until 1890.  With that accomplished by 1871, he skillfully used balance of power diplomacy to maintain Germany's position in a Europe which, despite many disputes and war scares, remained at peace.  For historian Eric Hobsbawm, it was Bismarck who "remained undisputed world champion at the game of multilateral diplomatic chess for almost twenty years after 1871, [and] devoted himself exclusively, and successfully, to maintaining peace between the powers".  However, his annexation of Alsace-Lorraine gave new fuel to French nationalism and promoted Germanophobia in France.  This helped set the stage for the First World War.