Myrtaceae

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Description: The Myrtaceae are primarily shrubs and understory trees in this area, and they are easy to recognize vegetatively. All of the New World species have simple, opposite leaves with punctations (tiny translucent dots of sequestered oil in the leaf, which are visible through a hand lens when the leaf is held up to the light). The crushed leaf has a pleasant, fruity or spicy aroma. The bark is usually whitish or reddish, thin and papery, and often flaking.

Economic uses: Many New World species of Myrtaceae have edible fruit; the best-known is Psidium guajava, the guava or guayaba. In Costa Rica you’ll also find the more acidic cas (P. friedrichsthalianum). The Old World genera Eucalyptus and Melaleuca are widely cultivated as ornamentals and shade trees.


Descripción: Casi todas las Myrtaceas de esta área son arbustos y árboles pequeños, y es fácil identificarlas estérilmente. Todas las especies de esta zona tienen hojas simples y opuestas con puntos translúcidos (motas de aceite dentro de la hoja, que se pueden ver a contra la luz con una lupa de mano). La hoja estrujada tiene un olor dulce similar a frutas o especias. La corteza es rojiza o blancuzca, fina, y usualmente escamosa.

Usos económicos: Muchas Myrtaceas del nuevo mundo tienen frutos comestibles. En Costa Rica las plantas más comunes son la guayaba (Psidium guajava) y el cas (P. friedrichsthalianum). Los géneros Eucalyptus y Melaleuca, del viejo mundo, son cultivados en muchas partes como ornamentales y para sombra.


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