Oaks of the World

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  Quercus x morisii
Author Borzi 1881 Nuovo Giorn. Bot. Ital. 13: 10
Synonyms ilex x suber
= x bertrandii Albert & Reynier 1902
= x mixta Villalobos ex Colmeiro 1888
= x morisii f. mixta (Villar ex Colm.) Franco & Vasc. 1954 Enum. Pl. Penins. Hispano-Lusit. 4: 677
= hispanica Colm. & Bout.
= x pseudomorisii A.Camus 1935
Local names
Range France, Spain, Portugal, Italy, Sardinia, Sicily, Algeria;
Growth habit 5-20 m;
Leaves 3-7.5 x 2-4.5 cm, oblong lanceolate or lanceolate; leathery; lustrous light green, hairless above; whitish tomentose beneath; apex pointed, base truncate or subcordate; margin dentate-serrate, with mucronate regular teeth, sometimes entire at basal half; few, prominent secondary veins; petiole tomentose 0.5-1.2 cm;
Flowers male flowers with 4-5 slightly pubescent anthers and longer, narrower stigmas than in Q. ilex; pistillate flowers on tomentose, 1-2 cm long rachis;
Fruits acorn solitary with stiff, tomentose, 1-3 cm long stalk; cup bell-shaped enclosing 1/2 of acorn, covered with numerous, silky scales with straight, free tip; maturing in 1 year;

Bark, twigs and
buds

bark thick but not or weakly corky; young twig densely whitish tomentose; bud small, tomentose, with persistent bracts;
Hardiness zone, habitat prefers wet, not calcareous soils;
Miscellaneous -- Differs from Q.suber in having leaves less pubescent beneath, cup less fringed at margin, bark less corky;
-- Q. x pseudomorisii Camus is not different, as it is actually the hybrid between Q. ilex and Q. suber var. occidentalis;

Subspecies and
varieties

-- For today's Authors, Q.x mixta is more precisely the hybrid between Q.suber and Q.rotundifolia;
to 7 m tall; leaves 1.5-3.5 x 0.8-2.5 cm, evergreen, leathery, ovate-lanceolate to oblong, margin spiny dentate, adaxially glabrescent, abaxially densely tomentose; petiole 3-10 mm long, stellate pubescent; acorn 1.5-3.5 cm; peduncle to 0.8 cm; cup 1.2-3 cm in diameter;

-- According to F.M. Vázquez, A. Coombes & al. 20118, the name of this taxon has changed, becoming : Q. x avellaniformis nothosubsp. morisii (Borzi) F.M. Vázquez & al. 2018; see Q. avellaniformis.

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