Oak vs Groningen

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An oak is a tree or shrub in the genus Quercus (; Latin "oak tree") of the beech family, Fagaceae. There are approximately 500 extant species of oaks. The common name "oak" also appears in the names of species in related genera, notably Lithocarpus (stone oaks), as well as in those of unrelated species such as Grevillea robusta (silky oaks) and the Casuarinaceae (she-oaks). The genus Quercus is native to the Northern Hemisphere, and includes deciduous and evergreen species extending from cool temperate to tropical latitudes in the Americas, Asia, Europe, and North Africa. North America contains the largest number of oak species, with approximately 90 occurring in the United States, while Mexico has 160 species of which 109 are endemic. The second greatest center of oak diversity is China, which contains approximately 100 species.

Oaks have spirally arranged leaves, with lobate margins in many species; some have serrated leaves or entire leaves with smooth margins. Many deciduous species are marcescent, not dropping dead leaves until spring. In spring, a single oak tree produces both male flowers (in the form of catkins) and small female flowers, meaning that the trees are monoecious. The fruit is a nut called an acorn or oak nut borne in a cup-like structure known as a cupule; each acorn contains one seed (rarely two or three) and takes 6–18 months to mature, depending on their species. The acorns and leaves contain tannic acid, which helps to guard from fungi and insects. The live oaks are distinguished for being evergreen, but are not actually a distinct group and instead are dispersed across the genus.

Source: Wikipedia

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Groningen (, also UK: , US: , Dutch: [ˈɣroːnɪŋə(n)] (listen); Gronings: Grun'n) is the main municipality as well as the capital city of the eponymous province in the Netherlands. It is the largest city in the north of the Netherlands and has 231,037 inhabitants (31 January 2019) on a total area of 180.21 km2 (69.58 sq mi), and land area of 168.93 km2 (65.22 sq mi) with a population density of 1,367 per km2 (3,540 per square mile).

It merged with Ten Boer and Haren municipalities on 1 January 2019. The Groningen-Assen metropolitan area has about half a million inhabitants. Groningen is an old city (more than 950 years) and was the regional power of the north of the Netherlands, a semi-independent city-state and member of the German Hanseatic League. Groningen is a university city, with students forming an estimated 25% of its total population.

Source: Wikipedia