Oaks of the World

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  Quercus conzattii
Author Trel. 1921 Proc. Amer. Philos. Soc. 60: 33 1921.
Synonyms Q. urbanii f. parvifolia Martinez 1954
Local names
Range Mexico (Sierra Madre de Oaxaca, SW Puebla). 1700-2800 m;
Growth habit 3-15 m
Leaves 6-15 cm long X 4-12 wide; obovate or suborbicular, convex; variable apex; base obtuse, cordate; margin revolute with 4-6 pairs of arisate teeth; adaxially light green, hairless except on veins; abaxially pale grey tomentose, made of stipitate fasciculate trichomes with 10-25 rays 0,4-0,8 mm long; 9-11 vein pairs, straight, impressed above; petiole 1-2 cm long, densely pubescent;
Flowers in March; male catkins with 30 flowers; female catkins 1-6 cm long, bearing 2-8 flowers;
Fruits acorn 1 cm long, 5 or more together on a 1-1.5 cm long peduncle; enclosed 1/3 to 1/2 in the cup; cup 8-10 mm wide, 4-6 mm high ; maturation in August same year;

Bark, twigs and
buds

twig thick (4 mm in diameter) with a dense, persistent, yellow pubescence; buds ovoid, pubescent, 3-5 mm long ; stipules deciduous 8-11 cm long;
Hardiness zone, habitat dry, rocky slopes.
Miscellaneous

-- Sub-genus Quercus, Section Lobatae, sub-section Racemiflorae
-- This taxon has been sometimes considered as a variety of Q. urbanii

-- Resembles Q. mcvaughii which differs in having larger and higher cups, only 1 or 2 acorns together, maturation biennal, fasciculate trichomes nearly sessile underneath, the pubescence being yellow.


Subspecies and
varieties
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