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Chart illustrating leaf morphology terms. The following terms are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (that is, the leaf blade or 'lamina' is undivided) or compound (that is, the leaf blade is divided into two or more leaflets). [1]
canyon live oak Fagaceae (beech family) 805 Quercus coccinea: scarlet oak Fagaceae (beech family) 806 Quercus ellipsoidalis: northern pin oak; Hill's oak Fagaceae (beech family) 809 Quercus falcata: southern red oak Fagaceae (beech family) 812 Quercus frainetto: Hungarian oak Fagaceae (beech family) Quercus garryana: Oregon white oak; Garry oak
An estimated 31% of the world's oak species are threatened with extinction, while 41% of oak species are considered to be of conservation concern. The countries with the highest numbers of threatened oak species (as of 2020) are China with 36 species, Mexico with 32 species, Vietnam with 20 species, and the US with 16 species.
– Chinkapin oak – eastern, central, and southwestern US (West Texas and New Mexico), northern Mexico; Quercus ningqiangensis S.Z.Qu & W.H.Zhang – southeastern China; Quercus oblongifolia Torr. – Arizona blue oak, Southwestern blue oak, or Mexican blue oak – # southwestern U.S., northwestern Mexico; Quercus obtusata Bonpl. – Mexico
Quercus ilicifolia, commonly known as bear oak or scrub oak, is a small shrubby oak native to the Eastern United States and, less commonly, in southeastern Canada. Its range in the United States extends from Maine to North Carolina , with reports of a few populations north of the international frontier in Ontario . [ 3 ]
Quercus agrifolia, the California live oak, [3] or coast live oak, is an evergreen [4] live oak native to the California Floristic Province.Live oaks are so-called because they keep living leaves on the tree all year, adding young leaves and shedding dead leaves simultaneously rather than dropping dead leaves en masse in the autumn like a true deciduous tree. [5]
Quercus × morehus, [3] Abram's oak in Kellogg's original description [4] (later called oracle oak by Jepson [5]), is a named hybrid between the red oaks Quercus kelloggii (California black oak) and Quercus wislizeni (interior live oak). [6]
Aside from tree waratah, it has also been called the satin oak, pink silky oak, satin silky oak, red silky oak, red oak, lowland bull oak, [6] and Queensland waratah. [2] The genus name is derived from Ancient Greek allo- 'other' or 'strange' and xylon 'wood' and refers to their unusual cell architecture compared with the related genera Telopea ...