Oaks of the World

General dataClassificationsList of speciesLocal namesBack to
home page

 Quercus intricata
AuthorTrel. 1922
Synonymsmicrophylla var. crispata A.DC. 1864
Local namesintricate oak ; dwarf oak ; Coahuila scrub oak ;
RangeMexico (Coahuila, Nuevo Leon, Durango, Zacatecas)  ; Texas (Chisos Mount., Eagle Mount.) ; from 1500 to 2500 m ; restricted area;
Growth habit 0.5-2 m; evergreen; intricate branches; thicket forming;
Leaves 1-5 x 0.5-3 cm ; evergreen; elliptic or oblong; very thick, leathery, rough, sometimes convex; apex pointed, base rounded; margin wavy, strongly revolute, entire or with 1-8 pairs of short teeth (less than 2 mm long); shiny grey green above, glabrous or with stellate hairs; yellowish grey or silvery tomentose beneath, becoming sometimes glabrescent; 6-10 veins pairs, hairless, prominent beneath; petiole 2-5 mm, tomentose;
Flowers spring; male catkins 2-3 cm long, with numerous flowers; female catkins 3-10 mm, with 1-5 pubescent flowers;
Fruitsacorn globose, 1 cm in diameter; light brown; single or paired; cup subsessile or shortly stalked (to 1.5 cm long), scaly, hairless, covering almost all of nut; maturing in 1 year; cotyledons distinct;

Bark, twigs and

bark grey, scaly, rough; twig slender, yellowish grey tomentose, becoming dark brown; bud pubescent at first, rounded, dark brown, 1-1.5 mm long;
Hardiness zone, habitat hardiness zone : 7; dry, calcareous, rocky soils;
Miscellaneous-- A. Camus : n° 255 ;
-- section Quercus ;
-- closely related to Mexican species
Q.microphylla Née, but leaves of Q.intricata are pointed and not rough;
-- no hybrid known;
Subspecies and
--- For Trelease = f. ovata Trel., f. angusta Trel., f. erratica Trel. ( Mexico) ;