There are two flower arrangements in hydrangeas with corymb style inflorescences, which includes the commonly grown "bigleaf hydrangea"- Hydrangea macrophylla. Plants in wild populations typically have few to none of the showy flowers, while cultivated hydrangeas have been bred and selected to have more of the larger type flowers. These showy flowers are often extended in a ring, or to the exterior of the small flowers. Typically the flowerheads contain two types of flowers: small non-showy fertile flowers in the center or interior of the flowerhead, and large, sterile showy flowers with large colorful sepals (tepals). Hydrangea flowers are produced from early spring to late autumn they grow in flowerheads ( corymbs or panicles) most often at the ends of the stems. This led to people believing Lepaute's name was Hortense, but the Larousse remarks that this is erroneous, and that the name probably came from hortus, garden. However, the flower's accepted name later became Hortensia. Philibert Commerson attempted to name the flower Lepautia or Peautia after Lepaute. The earlier name, Hortensia, is a Latinised version of the French given name Hortense, honoring French astronomer and mathematician Nicole-Reine Hortense Lepaute. Hydrangea is derived from Greek and means ‘water vessel’ (from ὕδωρ húdōr "water" + ἄγγος ángos or αγγεῖον angeîon "vessel"), in reference to the shape of its seed capsules. The flowers of hydrangea act as natural pH indicators, sporting blue flowers when the soil is acidic and pink ones when the soil is alkaline. They can be either deciduous or evergreen, though the widely cultivated temperate species are all deciduous. Most are shrubs 1–3 m (3 ft 3 in – 9 ft 10 in) tall, but some are small trees, and others lianas reaching up to 30 m (100 ft) by climbing up trees. By far the greatest species diversity is in eastern Asia, notably China, Korea, and Japan. Hydrangea, ( / h aɪ ˈ d r eɪ n dʒ i ə/) commonly named the hortensia, is a genus of more than 75 species of flowering plants native to Asia and the Americas.
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