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Ilex (/ ˈ aɪ l ɛ k s /) or holly [3] is a genus of over 570 species of flowering plants in the family Aquifoliaceae, and the only living genus in that family. [4] Ilex has the most species of any woody dioecious angiosperm genus. [5] The species are evergreen or deciduous trees, shrubs, and
The leaves of both species are similar in outline and toothed and bristled very much the same way, but the leaves are brighter in the American holly and larger. [citation needed] The American holly, called the evergreen or Christmas holly (Ilex opaca Aiton) was named the state tree of Delaware on 1 May 1939. [19]
The holly blue is subject to marked population cycles which appear to be caused by interactions with the parasitoid ichneumon wasp Listrodromus nycthemerus. The wasp lays an egg on a holly blue caterpillar, inserting the egg into the caterpillar's body and the adult wasp emerges from the chrysalis, killing the chrysalis before its emergence.
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Aquifoliaceae: holly family; Ilex: holly trees; Ilex ambigua: Carolina holly Aquifoliaceae (holly family) Ilex amelanchier: serviceberry holly; sarvis holly Aquifoliaceae (holly family) Ilex aquifolium: European holly Aquifoliaceae (holly family) Ilex cassine: dahoon Aquifoliaceae (holly family) Ilex coriacea: sweet gallberry; large gallberry holly
Ilex aquifolium, the holly, common holly, English holly, European holly, or occasionally Christmas holly, is a species of flowering plant in the family Aquifoliaceae, native to western and southern Europe, northwest Africa, and southwest Asia.
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