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Pakistan | Family List | Fagaceae

Quercus Linn., Sp. Pl. 994. 1753. Gen. Pl. ed. 5.431.1754; Boiss., Fl. Or. 4:1162. 1879; Hook. f., Fl. Brit. Ind. 5:600.1888; Collett, Fl. Siml. 473.1902; Kanjilal, For. Fl. Siw. Jaun., For. Div. 400.1911; Brandis, Ind. Trees, 626.1911; Camus, A. Les Chenes, Monog. du genre Quercus, Vol 1-3. 1934-54; Parker, For. Fl. Punj. ed. 3.493. 1956; Maleev in Kom., Fl. URSS. 5:322.1936; Hutch., Gen. Fl. Pl.2:131. 1967; Menitsky in Rech.f., Fl. Iran. 77:3.1971.

Monoecious, evergreen or deciduous trees, rarely shrubs. Leaves usually toothed or lobed, stipulate. Male flowers in catkins, solitary or in clusters on them. Perianth campanulate or cupular, 3-6-lobed; stamens usually 6, pistillode sometimes present. Female flowers solitary or in clusters of 3 on erect spikes; perianth surrounded by an involucre of scales; ovary 3-5-locular; styles usually as many as the loculi. The fruit partially enclosed in a cupule formed by the accrescent and hardened involucral scales; seed solitary, rarely more.

Over 400 species are distributed in America, temperate Europe, Asia, and sub-tropical Africa. Represented here by 6 species.

1 Leaves pinnatifid or –partite, auricled at the base   Quercus robur
+ Leaves entire or spiny-toothed, not auricled at the base   (2)
2 (1) Bract 3-4 mm long. Styles sub-capitate. The accrescent scales of the cupule in annular rings   Quercus glauca
+ Bract less than 2.5 mm long. Styles linear or clavate. The cupule of imbricate scales   (3)
3 (2) Lower leaf surface rusty tomentose. Acorn subglobose, the cupule covering only its base   Quercus semecarpifolia
+ Lower leaf surface white-tomentose to glabrescent and pale green. Acorn ovoid or oblong, the cupule covering 1/3 to 2/3 of it   (4)
4 (3) Leaves always coarsely toothed. Upper leaf surfaces dark green and spiny, lower white tomentose   Quercus incana
+ Leaves entire to spiny toothed, upper surface green, lower pale to white tomentose, becoming glabrescent   (5)
5 (4) Small tree or shrub. Young shoots and under surfaces of leaves stellate pubescent. Anthers hairy. Acorn more or less cylindric   Quercus baloot
+ A medium to large sized tree. Young shoots and under surfaces of leaves glabrescent. Anthers glabrous. Acorn more or less ovoid   Quercus dilatata

Lower Taxa

Related Synonym(s):


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